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Norihiro Sugita

Section

Cyberscience Center

Job title

Professor

Degree

博士（工学）（東北大学）
修士（工学）（東北大学）

researchmap

https://researchmap.jp/read0210629

J-GLOBAL ID

200901070232121692

Committee Memberships 16

ヒューマンインタフェース学会　評議員

2022/03 - Present
計測自動制御学会　代議員

2021/04 - Present
IEEE consumer technology society　Audio/Video systems and signal processing technical committee member

2020/12 - Present
日本生体医工学会　広報委員会委員

2017/10 - Present
日本生体医工学会東北支部　幹事

2017/10 - Present
計測自動制御学会東北支部　専門委員

2017/01 - Present
計測自動制御学会東北支部　庶務幹事

2020/01 - 2021/01
計測自動制御学会システムインテグレーション部門人工生命体システム部会　委員

2008/04 - 2019/03
ヒューマンインタフェース学会　論文編集委員

2016/01 - 2017/04
計測自動制御学会東北支部　庶務幹事

2016/01 - 2016/12
電気学会編修専門第3部会　委員

2014/05 - 2016/04
電気学会東北支部　総務企画幹事

2014/05 - 2016/04
計測自動制御学会東北支部　会計幹事

2014/01 - 2015/12
社団法人電子情報技術産業協会「心理的負荷測定システム開発委員会」　委員

2009/05 - 2010/03
社団法人電子情報技術産業協会「快適３Ｄ基盤研究推進委員会」　委員

2009/05 - 2010/03
社団法人電子情報技術産業協会「映像酔いガイドライン検証システム開発委員会」　委員

2007/07 - 2009/03

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Professional Memberships 4

日本バーチャルリアリティ学会
日本生体医工学会
The Institute of Electrical and Electronics Engineers
計測自動制御学会

Research Interests 5

Non-contact measurement of bio-signals
Telemedicine
Visual stimulation
Virtual reality
Bio-signal processing

Research Areas 3

Life sciences / Rehabilitation science /
Manufacturing technology (mechanical, electrical/electronic, chemical engineering) / Control and systems engineering /
Life sciences / Medical systems /

Awards 15

IEEE LifeTech 2022 Excellent Paper Award for Oral Presentation

2022/03　Basic Approach to Estimation of Blood Oxygen Saturation Using an RGB Color Camera without Infrared Light
第59回日本人工臓器学会若手萌芽ポスターセッション優秀賞

2021/11　非接触高速度画像による末梢循環の可視化と脈波伝播速度推定の試み
インテリジェント・システム・シンポジウム2021最優秀論文賞

2021/09　4次元CTデータの内挿・外挿によるX線透視像中の腫瘍像推定モデルの性能向上の試み
第28回インテリジェント・システム・シンポジウム最優秀論文賞

2018/09　マーカレス腫瘍追跡のための隠れマルコフモデルを用いたX線動画像からの物体輝度抽出
SICE Annual Conference 2016 Poster Presentation Award

2016/09　A Real-Time Homography-Based Tracking Method for Tracking Deformable Tumor Motion in Fluoroscopy
SICE システム・情報部門 SSI研究奨励賞

2015/11　公益社団法人計測自動制御学会　呼吸性移動時系列の最大リャプノフ指数推定に基づく予測可能性の検討
研究奨励賞

2015/11　一般社団法人石田實記念財団　足こぎ車いすの遠隔リハビリテーションシステムに関する研究
生体医工学シンポジウム2014 ベストリサーチアワード

2014/09　Pilot study on evaluation of baroreflex function using green light photoplethysmogram
優秀論文発表A賞

2014/01　一般社団法人電気学会　呼吸性位置変動時系列予測の性能改善のための知的モデル化の試み
生体医工学シンポジウム2013 ベストリサーチアワード

2013/09　一般社団法人日本生体医工学会　生理的指標を用いた3次元映像の生体影響評価における心理的影響の減衰
生体医工学シンポジウム2012 ベストリサーチアワード

2012/09　Physiological Evaluation of Visually-Induced Motion Sickness Using Independent Component Analysis of Photoplethysmogram
生体医工学シンポジウム2011 ベストリサーチアワード

2011/09
第22回安藤博記念学術奨励賞

2009/06
The 9th International Symposium on Future Medical Engineering based on Bio-nanotechnology Young Investigator Award

2007/01　21st Century COE Program　Physiological Assessment of Effects of Visual Stimulation Using Finger Photoplethysmography
The 6th International Symposium on Future Medical Engineering based on Bio-nanotechnology young Investigator Award

2005/11　21st Century COE Program　Evaluation of Reproducibility of Visually-Induced Motion Sickness Based on a Physiological Index ρmax

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Papers 145

Blood Pressure Estimation from Photoplythmography Using Hybrid Scattering–LSTM Networks Peer-reviewed

Osama A. Omer, Mostafa Salah, Ammar M. Hassan, Mohamed Abdel-Nasser, Norihiro Sugita, Yoshifumi Saijo

BioMedInformatics　4　(1)　139-157　2024/01/09
Publisher: MDPI AG
DOI： 10.3390/biomedinformatics4010010 　

eISSN： 2673-7426

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One of the most significant indicators of heart and cardiovascular health is blood pressure (BP). Blood pressure (BP) has gained great attention in the last decade. Uncontrolled high blood pressure increases the risk of serious health problems, including heart attack and stroke. Recently, machine/deep learning has been leveraged for learning a BP from photoplethysmography (PPG) signals. Hence, continuous BP monitoring can be introduced, based on simple wearable contact sensors or even remotely sensed from a proper camera away from the clinical setup. However, the available training dataset imposes many limitations besides the other difficulties related to the PPG time series as high-dimensional data. This work presents beat-by-beat continuous PPG-based BP monitoring while accounting for the aforementioned limitations. For a better exploration of beats’ features, we propose to use wavelet scattering transform as a better descriptive domain to cope with the limitation of the training dataset and to help the deep learning network accurately learn the relationship between the morphological shapes of PPG beats and the BP. A long short-term memory (LSTM) network is utilized to demonstrate the superiority of the wavelet scattering transform over other domains. The learning scenarios are carried out on a beat basis where the input corresponding PPG beat is used for predicting BP in two scenarios; (1) Beat-by-beat arterial blood pressure (ABP) estimation, and (2) Beat-by-beat estimation of the systolic and diastolic blood pressure values. Different transformations are used to extract the features of the PPG beats in different domains including time, discrete cosine transform (DCT), discrete wavelet transform (DWT), and wavelet scattering transform (WST) domains. The simulation results show that using the WST domain outperforms the other domains in the sense of root mean square error (RMSE) and mean absolute error (MAE) for both of the suggested two scenarios.
Non-Contact Measurement of Blood Oxygen Saturation Using Facial Video Without Reference Values Peer-reviewed

Soma Sasaki, Norihiro Sugita, Takanori Terai, Makoto Yoshizawa

IEEE Journal of Translational Engineering in Health and Medicine　12　76-83　2023/09
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
DOI： 10.1109/jtehm.2023.3318643 　

eISSN： 2168-2372
Prediction and prevention system for Severe Acute Respiratory Syndrome CoronaVirus 2 infection by preempting the onset of a cough Peer-reviewed

Tomoyuki Yambe, Yasuyuki Shiraishi, Akihiro Yamada, Aoi Fukaya, Genta Sahara, Makoto Yoshizawa, Norihiro Sugita

2023 45th Annual International Conference of the IEEE Engineering in Medicine & Biology Society (EMBC)　1-4　2023/07
Publisher: IEEE
DOI： 10.1109/embc40787.2023.10340250 　
Comprehensive evaluation of machine learning algorithms for predicting sleep–wake conditions and differentiating between the wake conditions before and after sleep during pregnancy based on heart rate variability Peer-reviewed

Xue Li, Chiaki Ono, Noriko Warita, Tomoka Shoji, Takashi Nakagawa, Hitomi Usukura, Zhiqian Yu, Yuta Takahashi, Kei Ichiji, Norihiro Sugita, Natsuko Kobayashi, Saya Kikuchi, Ryoko Kimura, Yumiko Hamaie, Mizuki Hino, Yasuto Kunii, Keiko Murakami, Mami Ishikuro, Taku Obara, Tomohiro Nakamura, Fuji Nagami, Takako Takai, Soichi Ogishima, Junichi Sugawara, Tetsuro Hoshiai, Masatoshi Saito, Gen Tamiya, Nobuo Fuse, Susumu Fujii, Masaharu Nakayama, Shinichi Kuriyama, Masayuki Yamamoto, Nobuo Yaegashi, Noriyasu Homma, Hiroaki Tomita

Frontiers in Psychiatry　14　2023/06/06
Publisher: Frontiers Media SA
DOI： 10.3389/fpsyt.2023.1104222 　

eISSN： 1664-0640

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Introduction Perinatal women tend to have difficulties with sleep along with autonomic characteristics. This study aimed to identify a machine learning algorithm capable of achieving high accuracy in predicting sleep–wake conditions and differentiating between the wake conditions before and after sleep during pregnancy based on heart rate variability (HRV). Methods Nine HRV indicators (features) and sleep–wake conditions of 154 pregnant women were measured for 1 week, from the 23rd to the 32nd weeks of pregnancy. Ten machine learning and three deep learning methods were applied to predict three types of sleep–wake conditions (wake, shallow sleep, and deep sleep). In addition, the prediction of four conditions, in which the wake conditions before and after sleep were differentiated—shallow sleep, deep sleep, and the two types of wake conditions—was also tested. Results and Discussion In the test for predicting three types of sleep–wake conditions, most of the algorithms, except for Naïve Bayes, showed higher areas under the curve (AUCs; 0.82–0.88) and accuracy (0.78–0.81). The test using four types of sleep–wake conditions with differentiation between the wake conditions before and after sleep also resulted in successful prediction by the gated recurrent unit with the highest AUC (0.86) and accuracy (0.79). Among the nine features, seven made major contributions to predicting sleep–wake conditions. Among the seven features, “the number of interval differences of successive RR intervals greater than 50 ms (NN50)” and “the proportion dividing NN50 by the total number of RR intervals (pNN50)” were useful to predict sleep–wake conditions unique to pregnancy. These findings suggest alterations in the vagal tone system specific to pregnancy.
Development of a Cloud System for Monitoring Blood Perfusion and Autonomic Nervous System Indices: The Mirror-Magical Project Invited

Makoto Yoshizawa, Norihiro Sugita, Emi Yuda, Tomoyuki Yambe

J106-C　(3)　90-98　2022/11/18

DOI： 10.14923/transelej.2022JCI0018 　

eISSN： 1881-0217
Characteristics of Pulse Waveform in Chronic Atrial Fibrillation: Simultaneous Comparison with ECG

Emi Yuda, Yuki Ogata, Yoshimi Shoji, Makoto Yoshizawa, Norihiro Sugita, Junichiro Hayano

2022 Joint 12th International Conference on Soft Computing and Intelligent Systems and 23rd International Symposium on Advanced Intelligent Systems (SCIS&ISIS)　1-4　2022/11

DOI： 10.1109/scisisis55246.2022.10001913 　

ISSN： 2377-6870
Improved Tumor Image Estimation in X-Ray Fluoroscopic Images by Augmenting 4DCT Data for Radiotherapy Peer-reviewed

Takumi Shinohara, Kei Ichiji, Jiaoyang Wang, Noriyasu Homma, Xiaoyong Zhang, Norihiro Sugita, Makoto Yoshizawa

Journal of Advanced Computational Intelligence and Intelligent Informatics　26　(4)　471-482　2022/07/20
Publisher: Fuji Technology Press Ltd.
DOI： 10.20965/jaciii.2022.p0471 　

ISSN： 1343-0130

eISSN： 1883-8014

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Measurement of tumor position is important for the radiotherapy of lung tumors with respiratory motion. Although tumors can be observed using X-ray fluoroscopy during radiotherapy, it is often difficult to measure tumor position from X-ray image sequences accurately because of overlapping organs. To measure tumor position accurately, a method for extracting tumor intensities from X-ray image sequences using a hidden Markov model (HMM) has been proposed. However, the performance of tumor intensity extraction depends on limited knowledge regarding the tumor motion observed in the four-dimensional computed tomography (4DCT) data used to construct the HMM. In this study, we attempted to improve the performance of tumor intensity extraction by augmenting 4DCT data. The proposed method was tested using simulated datasets of X-ray image sequences. The experimental results indicated that the HMM using the augmentation method could improve tumor-tracking performance when the range of tumor movement during treatment differed from that in the 4DCT data.
Basic Approach to Estimation of Blood Oxygen Saturation Using an RGB Color Camera without Infrared Light Peer-reviewed

Makoto Yoshizawa, Norihiro Sugita, Akira Tanaka, Atsushi Togashi, Isao Kaji, Tomoyuki Yambe

2022 IEEE 4th Global Conference on Life Sciences and Technologies (LifeTech)　68-71　2022/03/07
Publisher: IEEE
DOI： 10.1109/lifetech53646.2022.9754752 　
Heart Rate Information-Based Machine Learning Prediction of Emotions Among Pregnant Women Peer-reviewed

Xue Li, Chiaki Ono, Noriko Warita, Tomoka Shoji, Takashi Nakagawa, Hitomi Usukura, Zhiqian Yu, Yuta Takahashi, Kei Ichiji, Norihiro Sugita, Natsuko Kobayashi, Saya Kikuchi, Yasuto Kunii, Keiko Murakami, Mami Ishikuro, Taku Obara, Tomohiro Nakamura, Fuji Nagami, Takako Takai, Soichi Ogishima, Junichi Sugawara, Tetsuro Hoshiai, Masatoshi Saito, Gen Tamiya, Nobuo Fuse, Shinichi Kuriyama, Masayuki Yamamoto, Nobuo Yaegashi, Noriyasu Homma, Hiroaki Tomita

Frontiers in Psychiatry　12　2022/01/27
Publisher: Frontiers Media SA
DOI： 10.3389/fpsyt.2021.799029 　

eISSN： 1664-0640

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In this study, the extent to which different emotions of pregnant women can be predicted based on heart rate-relevant information as indicators of autonomic nervous system functioning was explored using various machine learning algorithms. Nine heart rate-relevant autonomic system indicators, including the coefficient of variation R-R interval (CVRR), standard deviation of all NN intervals (SDNN), and square root of the mean squared differences of successive NN intervals (RMSSD), were measured using a heart rate monitor (MyBeat) and four different emotions including “happy,” as a positive emotion and “anxiety,” “sad,” “frustrated,” as negative emotions were self-recorded on a smartphone application, during 1 week starting from 23rd to 32nd weeks of pregnancy from 85 pregnant women. The k-nearest neighbor (k-NN), support vector machine (SVM), logistic regression (LR), random forest (RF), naïve bayes (NB), decision tree (DT), gradient boosting trees (GBT), stochastic gradient descent (SGD), extreme gradient boosting (XGBoost), and artificial neural network (ANN) machine learning methods were applied to predict the four different emotions based on the heart rate-relevant information. To predict four different emotions, RF also showed a modest area under the receiver operating characteristic curve (AUC-ROC) of 0.70. CVRR, RMSSD, SDNN, high frequency (HF), and low frequency (LF) mostly contributed to the predictions. GBT displayed the second highest AUC (0.69). Comprehensive analyses revealed the benefits of the prediction accuracy of the RF and GBT methods and were beneficial to establish models to predict emotions based on autonomic nervous system indicators. The results implicated SDNN, RMSSD, CVRR, LF, and HF as important parameters for the predictions.
生体信号処理を用いたCOVID-19罹患推定技術の現状と課題

湯田恵美, 杉田典大, 吉澤誠

生体医工学　Annual60　(Abstract)　121_1-121_1　2022
Publisher: 公益社団法人日本生体医工学会
DOI： 10.11239/jsmbe.annual60.121_1 　

ISSN： 1347-443X

eISSN： 1881-4379

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スマートウォッチやスマートリングなどのウェアラブルセンサは，心拍数や身体加速度などの生体情報を計測・収集して管理する健康管理機能を有し，運動や睡眠の客観的評価に役立つデバイスとして普及しつつある．そして，我が国が目指すべき未来の目標として，超早期の疾患予測・予防の実現が提唱されており，未病状態から健康な状態に引き戻すための方法の確立と疾患の発症自体の抑制・予防の推進が重要視されている．非侵襲手法で生体信号時系列データ得られるウェアラブルデバイスは，人間の健康状態の推定や改善に大きく寄与することが期待され，得られたビッグデータを解析する研究が世界中で進展している．米国ではウェアラブルセンサから得られた皮膚体温，心拍数および関連指標と，COVID-19の特徴である発熱，咳，疲労などの症状発現との関連を観察するビッグデータプロジェクトが発足し，生理学的反応検出と罹患予測のアルゴリズム開発を目的として生体情報の収集が進んでいる(TemPredict Study)．体内ウイルスの早期検出は感染症の封じ込めにも重要であり，とりわけ医療従事者は，早期予測によって蔓延危険性を低減することができる．このように，パンデミックとの戦いに貢献しうる容易計測手法が模索され，生体信号処理を用いた生体ビッグデータ研究も発展しつつある．報告者らは，これまでにウェアラブルセンサから得られた生体信号に機械学習技術を応用して疾患の予兆を捉える複数の研究に着手しており，心疾患や精神疾患，睡眠障害のスクリーニングを行うアルゴリズムの研究開発を行ってきた．本発表では，COVID-19の推定に関する最新研究について具体的に紹介した上で，生体医工学分野における展開可能性について述べる．
Remote, Non-Contact and Continuous Extraction of Multiple Peoples’ Autonomic Nervous System Indices from One Fish-Eye Camera

Makoto Yoshizawa, Norihiro Sugita, Akira Tanaka, Noriyasu Homma, Emi Yuda, Tomoyuki Yambe

Proceedings of the International Display Workshops　28　573-574　2021/12/02
Publisher: International Display Workshops General Incorporated Association
DOI： 10.36463/idw.2021.0573 　

ISSN： 1883-2490
Performance Evaluation of Cross Correlation Functions Based on Correlation Filters

Shunsuke Yamaki, Shuntaro Seki, Norihiro Sugita, Makoto Yoshizawa

2021 20th International Symposium on Communications and Information Technologies (ISCIT)　145-149　2021/10/19
Publisher: IEEE
DOI： 10.1109/iscit52804.2021.9590596 　
A study on indoor physical activity monitoring using Bluetooth signal strength Peer-reviewed

Saida Salima Nawrin, Kei Ichiji, Shunsuke Yamaki, Norihiro Sugita, Makoto Yoshizawa

2021 IEEE 3rd Global Conference on Life Sciences and Technologies (LifeTech)　489-493　2021/03/09
Publisher: IEEE
DOI： 10.1109/lifetech52111.2021.9391957 　
A Cloud System for Extraction of Autonomic Nervous System Indices and Blood Pressure Variabilities from Video Images

Makoto Yoshizawa, Norihiro Sugita, Akira Tanaka, Noriyasu Homma, Tomoyuki Yambe

Proceedings of the International Display Workshops　27　983-984　2020/12/10
Publisher: International Display Workshops General Incorporated Association
DOI： 10.36463/idw.2020.0983 　

ISSN： 1883-2490
Eye movements and physiological measurements during watching artificial three-dimensional image with vertical parallax Invited

Norihiro Sugita, Makoto Yoshizawa

Proceedings of the International Display Workshops　28　535-538　2020/12/09
Publisher: International Display Workshops General Incorporated Association
DOI： 10.36463/idw.2020.0535 　

ISSN： 1883-2490
A Deep Learning Aided Drowning Diagnosis for Forensic Investigations using Post-Mortem Lung CT Images Peer-reviewed

Noriyasu Homma, Xiaoyong Zhang, Amber Qureshi, Takuya Konno, Yusuke Kawasumi, Akihito Usui, Masato Funayama, Ivo Bukovsky, Kei Ichiji, Norihiro Sugita, Makoto Yoshizawa

2020 42nd Annual International Conference of the IEEE Engineering in Medicine & Biology Society (EMBC)　1262-1265　2020/07
Publisher: IEEE
DOI： 10.1109/embc44109.2020.9175731 　
Comparison of Visible and Infrared Video Plethysmography Captured from Different Regions of the Human Face Peer-reviewed

Norihiro Sugita, Tomoya Matsuzaki, Makoto Yoshizawa, Kei Ichiji, Shunsuke Yamaki, Noriyasu Homma

2020 42nd Annual International Conference of the IEEE Engineering in Medicine & Biology Society (EMBC)　4187-4190　2020/07
Publisher: IEEE
DOI： 10.1109/embc44109.2020.9176138 　
Noise Reduction Technique for Single-Color Video Plethysmography Using Singular Spectrum Analysis Peer-reviewed

Norihiro Sugita, Metin Akay, Yasemin M. Akay, Makoto Yoshizawa

IEEE Journal of Biomedical and Health Informatics　24　(6)　1788-1795　2020/06
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
DOI： 10.1109/jbhi.2019.2949883 　

ISSN： 2168-2194

eISSN： 2168-2208
Noncontact monitoring of heart rate responses to taste stimuli using a video camera Peer-reviewed

Masnani Bt Mohamed, Makoto Yoshizawa, Norihiro Sugita, Shunsuke Yamaki, Kei Ichiji

Indonesian Journal of Electrical Engineering and Computer Science　18　(1)　293-300　2020/04/01
Publisher: Institute of Advanced Engineering and Science
DOI： 10.11591/ijeecs.v18.i1.pp293-300 　

ISSN： 2502-4752

eISSN： 2502-4760
Hidden Markov model-based extraction of target objects in X-ray image sequence for lung radiation therapy Peer-reviewed

Masahiro Shindo, Kei Ichiji, Noriyasu Homma, Xiaoyong Zhang, Shungo Okuda, Norihiro Sugita, Shunsuke Yamaki, Yoshihiro Takai, Makoto Yoshizawa

IEEJ Transactions on Electronics, Information and Systems　140　(1)　49-60　2020

DOI： 10.1541/ieejeiss.140.49 　

ISSN： 0385-4221

eISSN： 1348-8155
A Modeling Approach to Investigate the Relationship Between Motion Sickness Severity and Visual Motion Invited

Akira Tanaka, Norihiro Sugita, Makoto Yoshizawa, Tomoyuki Yambe

Proceedings of the International Display Workshops　26　1152-1154　2019/11
Publisher: International Display Workshops General Incorporated Association
DOI： 10.36463/idw.2019.vhf5-1 　

ISSN： 1883-2490
Estimation of Absolute Blood Pressure Using Video Images Captured at Different Heights from the Heart International-journal Peer-reviewed

Norihiro Sugita, Taihei Noro, Makoto Yoshizawa, Kei Ichiji, Shunsuke Yamaki, Noriyasu Homma

2019 41st Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)　4458-4461　2019/07
Publisher: IEEE
DOI： 10.1109/embc.2019.8856362 　

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The risk of cardiovascular diseases is related to the absolute level of blood pressure as well as its fluctuation while sleeping or during daily activities. To assess the risk, a simpler method to monitor daily blood pressure is desirable. In recent years, there has been a focus on developing a method to obtain pulse waves from video images of the human body. This is a promising technique to acquire biometric information without contact. In this study, we propose a new method to estimate the absolute level of blood pressure by using two video images of human hands captured at different heights from the heart. We focus on the amplitude difference of pulse waves obtained from the video images and derive an equation to estimate blood pressure based on the relationship between the internal pressure and the cross-sectional area of the blood vessel. The accuracy of the estimation was evaluated using data obtained from 5 healthy subjects performing cycling exercises that change their blood pressure. The average value of the root mean square error between the real value and the estimated value was 25.7 mmHg, while that of correlation coefficient was 0.66. There were large individual differences, particularly in the estimation of the absolute value of blood pressure. This result suggests the need for individual correction of the compliance curve, which represents the relationship between the internal pressure and the cross-sectional area of the blood vessel.
Effect of viewing a three-dimensional movie with vertical parallax Peer-reviewed

Norihiro Sugita, Katsuhiro Sasaki, Makoto Yoshizawa, Kei Ichiji, Makoto Abe, Noriyasu Homma, Tomoyuki Yambe

Displays　58　20-26　2019/07
Publisher: Elsevier BV
DOI： 10.1016/j.displa.2018.10.007 　

ISSN： 0141-9382
Contactless Technique for Measuring Blood-Pressure Variability from One Region in Video Plethysmography Peer-reviewed

Norihiro Sugita, Makoto Yoshizawa, Makoto Abe, Akira Tanaka, Noriyasu Homma, Tomoyuki Yambe

Journal of Medical and Biological Engineering　39　(1)　76-85　2019/02
Publisher: Springer Science and Business Media LLC
DOI： 10.1007/s40846-018-0388-8 　

ISSN： 1609-0985

eISSN： 2199-4757
掌映像からの血圧情報推定に関する研究

野呂泰平, 松嵜朋也, 吉澤誠, 杉田典大, 八巻俊輔, 市地慶

生体医工学　Annual57　(Abstract)　S187_2-S187_2　2019
Publisher: 公益社団法人日本生体医工学会
DOI： 10.11239/jsmbe.annual57.s187_2 　

ISSN： 1347-443X

eISSN： 1881-4379

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近年，ビデオカメラからの映像を用いて非接触で生体情報を取得する研究が盛んに行われている．ヘモグロビンの吸光度が緑色の波長帯域で高いという原理に基づいて，身体映像中の緑色輝度値の変化から脈波（映像脈波と呼ぶ）を計測することができる．本研究では映像脈波を用いて，血圧の絶対値を推定する手法を提案する．映像脈波は血管内の血液量変化を反映するため，血管の断面積と相関していると考えられる．そこで血管内圧と断面積の関係式を用いて，心臓からの高さが異なる2ヶ所で計測した映像脈波の振幅値の比から血管内圧を推定する式を導出した．健常な5名の被験者を対象として，安静とぺダリング運動を交互に行い血圧を変化させる実験を行った．実験の結果，実際の血圧値と推定値の相関係数は平均で0.64，推定値誤差は平均で42.7 mmHgであったが，最も良い被験者では相関係数0.89，推定値誤差は7.15 mmHgであった．誤差の原因としては，提案式に含まれる定数項の値が被験者毎に異なっているためであると考えられることから，今後，この定数値を安定的に求める方法の確立が必要である．
第23回大会報告

北濵兼一, 今村文彦, 吉澤誠, 高嶋和毅, 杉田典大, 市地慶, 松永忠雄, 藤田和之, 鏡慎吾, 田中明, 阿部亨, 鈴木優, 片山統裕, 坂本修一, 昆陽雅司, 永野光, 遠藤恵一, 今村伊知郎, 吉田ひさよ, 崔正烈, 北村喜文, 木村敏幸, 八巻俊輔, 城山一真, 苗村健

日本バーチャルリアリティ学会誌　23　(4)　6-47　2018/12/31
Publisher: 特定非営利活動法人日本バーチャルリアリティ学会
DOI： 10.18974/jvrsj.23.4_6 　

ISSN： 1342-6680

eISSN： 2435-8746
An Optimization Technique to Extract Video Pulse Wave for Non-Contact Remote Monitoring of Autonomic Nervous System and Blood Pressure Variability Peer-reviewed

Makoto Yoshizawa, Norihiro Sugita, Akira Tanaka, Kei Ichiji, Noriyasu Homma, Tomoyuki Yambe

2018 IEEE 7th Global Conference on Consumer Electronics (GCCE)　425-428　2018/10
Publisher: IEEE
DOI： 10.1109/gcce.2018.8574732 　
Extraction of Blood Pressure Information from Video Plethysmography Invited

Norihiro Sugita, Makoto Yoshizawa, Akira Tanaka, Makoto Abe, Noriyasu Homma, Tomoyuki Yambe

2018 40th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)　2018/07
Development of System to Reproduce Outside Environments when Driving with Cycling Wheelchair Peer-reviewed

Norihiro Sugita, Kenta Ogawa, Makoto Yoshizawa, Noriyasu Homma, Kazunori Seki, Yasunobu Handa

Transactions of the Virtual Reality Society of Japan　23　(1)　3-11　2018/03

DOI： 10.18974/tvrsj.23.1_3 　

ISSN： 2423-9593
Remote and non-contact extraction techniques of autonomic nervous system indices and blood pressure variabilities from video images

Makoto Yoshizawa, Norihiro Sugita, Akira Tanaka, Noriyasu Homma, Tomoyuki Yambe

Proceedings of the International Display Workshops　968-971　2018
Publisher: International Display Workshops
ISSN： 1883-2490
Non-contact blood pressure estimation using video pulse waves for ubiquitous health monitoring Peer-reviewed

Makoto Yoshizawa, Norihiro Sugita, Makoto Abe, Akira Tanaka, Noriyasu Homma, Tomoyuki Yambe

2017 IEEE 6th Global Conference on Consumer Electronics, GCCE 2017　2017-　1-3　2017/12/19
Publisher: Institute of Electrical and Electronics Engineers Inc.
DOI： 10.1109/GCCE.2017.8229429 　
Adverse Effect of Watching Three-Dimensional Image with Vertical Disparity Invited

Norihiro Sugita, Katsuhiro Sasaki, Makoto Yoshizawa, Tomoyuki Yambe

The 6th International Conference on Visually Induced Motion Sensations (VIMS2017)　14-14　2017/11
最大リャプノフ指数推定に基づく呼吸性移動時系列の予測可能性の検討 Peer-reviewed

市地慶, 本間経康, 張曉勇, 武田賢, 髙井良尋, 杉田典大, 吉澤誠

東北医学雑誌　129　(1)　47-47　2017/08
Remote and Non-Contact Monitoring System of Physiological Indices to Cope with Visually Induced Motion Sickness

Makoto Yoshizawa, Norihiro Sugita, Makoto Abe, Akira Tanaka, Noriyasu Homma, Tomoyuki Yambe

The International Society of Electrophysiology and Kinesiology 2016　2016/09
Blood perfusion display based on video pulse wave Peer-reviewed

Makoto Yoshizawa, Norihiro Sugita, Makoto Abe, Akira Tanaka, Kazuma Obara, Tsuyoshi Yamauchi, Noriyasu Homma, Tomoyuki Yambe

2016 38th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)　4763-4767　2016/08

DOI： 10.1109/embc.2016.7591792 　

ISSN： 1557-170X
A Tele-Electrocardiographic Monitoring System for Patients with Chronic Diseases at Home Peer-reviewed

Yoshizawa M, Ohuchi H, Nunokawa K, Taniuchi K, Okaniwa T, Sugita N, Abe M, Homma N, Yambe T

Austin Emergency Medicine　2　(6)　1031-1-1031-4　2016/06/13
The Pilot Study of Evaluating Fluctuation in the Blood Flow Volume of the Radial Artery, a Site for Traditional Pulse Diagnosis Peer-reviewed

Masashi Watanabe, Soichiro Kaneko, Shin Takayama, Yasuyuki Shiraishi, Takehiro Numata, Natsumi Saito, Takashi Seki, Norihiro Sugita, Satoshi Konno, Tomoyuki Yambe, Makoto Yoshizawa, Nobuo Yaegashi, Tadashi Ishii

Medicines　3　(2)　11-11　2016/05/17
Publisher: MDPI AG
DOI： 10.3390/medicines3020011 　

eISSN： 2305-6320

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Background: Radial artery (RA) pulse diagnosis has been used in traditional Asian medicine. Blood pressure (BP) and pulse rate related to heart rate variability (HRV) can be monitored via the RA. The fluctuation in these parameters has been assessed using fast Fourier transform (FFT) analytical methods that calculate power spectra. Methods: We measured blood flow volume (Volume) in the RA and evaluated its fluctuations. Normal participants (n = 34) were enrolled. We measured the hemodynamics of the right RA for approximately 50 s using ultrasonography. Results: The parameters showed the center frequency (CF) of the power spectrum at low frequency (LF) and high frequency (HF). More than one spectral component indicated that there were fluctuations. The CF at LF for Volume was significantly different from that for vessel diameter (VD); however, it was significantly correlated with blood flow velocity (Velocity). On the other hand, the CF at HF for Volume was significantly different from that for Velocity; however, it was significantly correlated with VD. Conclusion: It is suggested that fluctuation in the Volume at LF of RA is influenced by the fluctuation in Velocity; on the other hand, fluctuation in the Volume at HF is influenced by the fluctuation in VD.
Sensorless cardiac phase detection for synchronized control of ventricular assist devices using nonlinear kernel regression model Peer-reviewed

Yoshihiro Hirohashi, Akira Tanaka, Makoto Yoshizawa, Norihiro Sugita, Makoto Abe, Tsuyoshi Kato, Yasuyuki Shiraishi, Hidekazu Miura, Tomoyuki Yambe

Journal of Artificial Organs　19　(2)　114-120　2016/01/13

DOI： 10.1007/s10047-015-0880-7 　

ISSN： 1434-7229

eISSN： 1619-0904
Mass Detection Using Deep Convolutional Neural Network for Mammographic Computer-Aided Diagnosis

Shintaro Suzuki, Xiaoyong Zhang, Noriyasu Homma, Kei Ichiji, Norihiro Sugita, Yusuke Kawasumi, Tadashi Ishibashi, Makoto Yoshizawa

2016 55TH ANNUAL CONFERENCE OF THE SOCIETY OF INSTRUMENT AND CONTROL ENGINEERS OF JAPAN (SICE)　1382-1386　2016

DOI： 10.1109/SICE.2016.7749265 　
A Real-Time Homography-Based Tracking Method for Tracking Deformable Tumor Motion in Fluoroscopy

Xiaoyong Zhang, Noriyasu Homma, Kei Ichiji, Norihiro Sugita, Yoshihiro Takai, Makoto Yoshizawa

2016 55TH ANNUAL CONFERENCE OF THE SOCIETY OF INSTRUMENT AND CONTROL ENGINEERS OF JAPAN (SICE)　1673-1677　2016

DOI： 10.1109/SICE.2016.7749183 　
Estimation of heart rate variability using a compact radiofrequency motion sensor Peer-reviewed

Norihiro Sugita, Narumi Matsuoka, Makoto Yoshizawa, Makoto Abe, Noriyasu Homma, Hideharu Otake, Junghyun Kim, Yukio Ohtaki

Medical Engineering & Physics　37　(12)　1146-1151　2015/12

DOI： 10.1016/j.medengphy.2015.09.008 　

ISSN： 1350-4533

eISSN： 1873-4030
Evaluation of visual fatigue while watching artificial three-dimensional image with vertical parallax Peer-reviewed

Katsuhiro Sasaki, Makoto Yoshizawa, Norihiro Sugita, Makoto Abe

2015 IEEE 4th Global Conference on Consumer Electronics (GCCE)　666-667　2015/10

DOI： 10.1109/gcce.2015.7398690 　
Remote monitoring of autonomic nervous system indices using video cameras Peer-reviewed

Makoto Yoshizawa, Norihiro Sugita, Makoto Abe, Kazama Obara, Akira Tanaka, Noriyasu Homma, Tomoyuki Yambe

2015 IEEE 4th Global Conference on Consumer Electronics (GCCE)　670-671　2015/10

DOI： 10.1109/gcce.2015.7398691 　
Easy Extraction of Blood Pressure Variability from Body Video Images Using Simulink Invited

Makoto Yoshizawa, Norihiro Sugita, Makoto Abe, Kazuma Obara, Akira Tanaka, Noriyasu Homma, Tomoyuki Yambe

2015 37th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)　2015/08
Techniques for estimating blood pressure variation using video images Peer-reviewed

Norihiro Sugita, Kazuma Obara, Makoto Yoshizawa, Makoto Abe, Akira Tanaka, Noriyasu Homma

2015 37th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)　4218-4221　2015/08

DOI： 10.1109/embc.2015.7319325 　

ISSN： 1557-170X
Evaluation of Baroreflex Function Using Green Light Photople-thysmogram in Consideration of Resistance to Artifacts Peer-reviewed

Makoto Abe, Makoto Yoshizawa, Kazuma Obara, Norihiro Sugita, Noriyasu Homma, Tomoyuki Yambe

Advanced Biomedical Engineering　4　1-6　2015/01/28
Publisher: Japanese Society for Medical and Biological Engineering
DOI： 10.14326/abe.4.1 　

ISSN： 2187-5219

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The maximum cross-correlation coefficient (ρ_max) between blood pressure (BP) and heart rate (HR) variability for frequency components limited to the Mayer wave-related band is useful for the evaluation of baroreflex function. However, continuous BP measurement with an expensive and bulky measuring device is required to calculate ρ_max. This study proposes a simpler method to obtain ρ_max using a green light photoplethysmogram (PPG). A green PPG sensor is less affected by motion artifacts than a near-infrared PPG sensor. In this study, an electrocardiogram, continuous BP, green PPG, and near-infrared PPG were obtained from the subjects. HR, mean BP, and pulse transit time were estimated from the signals, and ρ_max was subsequently calculated. Compared to the ρ_max obtained from the near-infrared PPG signal, the ρ_max obtained from the green PPG signal is closer in value to the ρ_max obtained from mean BP. These results show that the green PPG sensor can be used to estimate baroreflex function instead of using continuous BP measurement.
TUMOR MOTION TRACKING USING KV/MV X-RAY FLUOROSCOPY FOR ADAPTIVE RADIATION THERAPY Peer-reviewed

Xiaoyong Zhang, Noriyasu Homma, Kei Ichiji, Makoto Abe, Norihiro Sugita, Ivo Bukovsky, Yoshihiro Takai, Makoto Yoshizawa

2015 INTERNATIONAL WORKSHOP ON COMPUTATIONAL INTELLIGENCE FOR MULTIMEDIA UNDERSTANDING (IWCIM)　1-4　2015
Relationship between Visual Fatigue and Vertical Parallax Amount

Katsuhiro Sasaki, Makoto Yoshizawa, Norihiro Sugita, Makoto Abe

Proc. of the 5th International Symposium on Visual Image Safety　29-30　2014/09/15
Assessment of motor function in hemiplegic patients using a virtual cycling wheel chair Peer-reviewed

Remi Ishikawa, Norihiro Sugita, Makoto Abe, Makoto Yoshizawa, Kazunori Seki, Yasunobu Handa

Proc. of the 10th International Conference on Disability, Virtual Reality and Associated Technologies　321-324　2014/09/02
MFER出力のホルター心電計の非MFER解析ソフトウェアでの解析精度検討 Peer-reviewed

鎌田弘之, 佐々木和也, 遠山明人, 吉澤誠, 杉田典大, 阿部誠

日本遠隔医療学会雑誌　10　(2)　240-241　2014/09
A kernel-based method for markerless tumor tracking in kV fluoroscopic images Peer-reviewed

Xiaoyong Zhang, Noriyasu Homma, Kei Ichiji, Makoto Abe, Norihiro Sugita, Yoshihiro Takai, Yuichiro Narita, Makoto Yoshizawa

Physics in Medicine and Biology　59　(17)　4897-4911　2014/08/07

DOI： 10.1088/0031-9155/59/17/4897 　

ISSN： 0031-9155

eISSN： 1361-6560
在宅看取り用遠隔医療システム

吉澤誠, 杉田典大, 阿部誠, 本間経康, 大内仁, 布川憲司, 山家智之

生体医工学　52　2014/06

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A Faster 1-D Phase-Only Correlation-Based Method for Estimations of Translations, Rotation and Scaling in Images Peer-reviewed

Xiaoyong Zhang, Noriyasu Homma, Kei Ichiji, Makoto Abe, Norihiro Sugita, Makoto Yoshizawa

IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES　E97A　(3)　809-819　2014/03

DOI： 10.1587/transfun.E97.A.809 　

ISSN： 1745-1337
Change of psychological effects in assessment of biological effects of three-dimensional scenography based on a physiological index Peer-reviewed

Makoto Abe, Daiki Niinuma, Makoto Yoshizawa, Norihiro Sugita, Noriyasu Homma, Tomoyuki Yambe, Shin-Ichi Nitta

Transactions of Japanese Society for Medical and Biological Engineering　52　(1)　11-17　2014

DOI： 10.11239/jsmbe.52.11 　

ISSN： 1347-443X 1881-4379
Heart rate reliability prediction for the estimated value from sheet-shaped microdisplacement sensor signal Peer-reviewed

Ken Ogihara, Norihiro Sugita, Makoto Yoshizawa, Noriyasu Homma, Makoto Abe, Kazuma Obara, Narumi Matsuoka, Koichi Saito, Atushi Goto

Transactions of Japanese Society for Medical and Biological Engineering　52　(1)　18-24　2014

DOI： 10.11239/jsmbe.52.18 　

ISSN： 1347-443X 1881-4379
Verification of a Method of Detecting Life-threatening Arrhythmias from Human Data for Use in Implantable Cardioverter-Defibrillator Peer-reviewed

Makoto ABE, Makoto YOSHIZAWA, Norihiro SUGITA, Noriyasu HOMMA, Kazuo SHIMIZU, Moe GOTO, Masashi INAGAKI, Masaru SUGIMACHI, Kenji SUNAGAWA

Advanced Biomedical Engineering　3　(0)　59-64　2014
Publisher: Japanese Society for Medical and Biological Engineering
DOI： 10.14326/abe.3.59 　

eISSN： 2187-5219
Discrimination Ability and Reproducibility of a New Index Reflecting Autonomic Nervous Function Based on Pulsatile Amplitude of Photoplethysmography Peer-reviewed

Yusuke Kano, Makoto Yoshizawa, Norihiro Sugita, Makoto Abe, Noriyasu Homma, Akira Tanaka, Tsuyoshi Yamauchi, Hidekazu Miura, Yasuyuki Shiraishi, Tomoyuki Yambe

2014 36TH ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY (EMBC)　1794-1800　2014

DOI： 10.1109/EMBC.2014.6943957 　

ISSN： 1557-170X
Visual Fatigue Induced by Accommodation Convergence Mismatch While Viewing Three-dimensional Television Peer-reviewed

Norihiro Sugita, Tatsuya Yamaga, Makoto Yoshizawa, Makoto Abe, Akira Tanaka, Tomoyuki Yambe, Shin-ichi Nitta

2014 IEEE 3RD GLOBAL CONFERENCE ON CONSUMER ELECTRONICS (GCCE)　250-251　2014

DOI： 10.1109/GCCE.2014.7031210 　
Improving the Detection Algorithm for Life-Threatening Arrhythmias: Implementation in Implantable Cardioverter-Defibrillators Peer-reviewed

Makoto Abe, Makoto Yoshizawa, Telma Keiko Sugai, Noriyasu Homma, Norihiro Sugita, Kazuo Shimizu, Moe Goto, Masashi Inagaki, Masaru Sugimachi, Kenji Sunagawa

ELECTRONICS AND COMMUNICATIONS IN JAPAN　96　(12)　1-8　2013/12

DOI： 10.1002/ecj.11585 　

ISSN： 1942-9533

eISSN： 1942-9541
A Kernel-Based Method for Real-Time Markerless Tumor Tracking in Fluoroscopic Image Sequence Peer-reviewed

Xiaoyong Zhang, Noriyasu Homma, Yoshihiro Takai, Yuichiro Narita, Kei Ichiji, Makoto Abe, Norihiro Sugita, Makoto Yoshizawa

Proc. of the SICE Annual Conference 2013　828-832　2013/09/14
Moving Object Segmentation in Surveillance Video Based on Adaptive Mixtures Peer-reviewed

Xiaoyong Zhang, Noriyasu Homma, Kei Ichiji, Makoto Abe, Norihiro Sugita, Makoto Yoshizawa

Proc. of the SICE Annual Conference 2013　1322-1325　2013/09/14
Volume registration based on 3-D phase correlation for tumor motion estimation in 4-D CT Peer-reviewed

Xiaoyong Zhang, Noriyasu Homma, Makoto Abe, Norihiro Sugita, Yoshihiro Takai, Yuichiro Narita, Makoto Yoshizawa

2013 35th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)　5095-5098　2013/07

DOI： 10.1109/embc.2013.6610694 　

ISSN： 1557-170X
A Great Impact of Green Video Signals on Tele-Healthcare in Daily Life, Especially for Rural or Disaster Areas

Yoshizawa Makoto, Tanaka Akira, Sugita Norihiro, Abe Makoto, Homma Noriyasu, Obara Kazuma, Yambe Tomoyuki

BME　51　M-55-M-55　2013
Publisher: Japanese Society for Medical and Biological Engineering
DOI： 10.11239/jsmbe.51.M-55 　

ISSN： 1347-443X
Evaluation of Baroreflex System for Elderly People in Disaster Areas Using Electrocardiogram and Plethysmogram

Yoshizawa Makoto, Tanaka Akira, Sugita Norihiro, Abe Makoto, Homma Noriyasu, Konno Satoshi, Yambe Tomoyuki

BME　51　M-9-M-9　2013
Publisher: Japanese Society for Medical and Biological Engineering
DOI： 10.11239/jsmbe.51.M-9 　

ISSN： 1347-443X
Tele-Echographic Image Archiving System Using a Tablet Computer and a Virtual Probe

Sugita Norihiro, Yoshizawa Makoto, Abe Makoto, Homma Noriyasu, Yambe Tomoyuki, Saijo Yoshifumi

BME　51　M-10-M-10　2013
Publisher: Japanese Society for Medical and Biological Engineering
DOI： 10.11239/jsmbe.51.M-10 　

ISSN： 1347-443X
Evaluation of Navigation Skill of Elderly People Using the Cycling Wheel Chair in a Virtual Environment Peer-reviewed

Norihiro Sugita, Makoto Yoshizawa, Yoshihisa Kojima, Akira Tanaka, Makoto Abe, Noriyasu Homma, Toshitsugu Kikuchi, Kazunori Seki, Yasunobu Handa

2013 IEEE VIRTUAL REALITY CONFERENCE (VR)　125-+　2013

DOI： 10.1109/VR.2013.6549394 　

ISSN： 1087-8270
A Hybrid Image Filtering Method for Computer-Aided Detection of Microcalcification Clusters in Mammograms Peer-reviewed

Xiaoyong Zhang, Noriyasu Homma, Shotaro Goto, Yosuke Kawasumi, Tadashi Ishibashi, Makoto Abe, Norihiro Sugita, Makoto Yoshizawa

Journal of Medical Engineering　2013　1-8　2013
Publisher: Hindawi Limited
DOI： 10.1155/2013/615254 　

ISSN： 2314-5129

eISSN： 2314-5137

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The presence of microcalcification clusters (MCs) in mammogram is a major indicator of breast cancer. Detection of an MC is one of the key issues for breast cancer control. In this paper, we present a highly accurate method based on a morphological image processing and wavelet transform technique to detect the MCs in mammograms. The microcalcifications are firstly enhanced by using multistructure elements morphological processing. Then, the candidates of microcalcifications are refined by a multilevel wavelet reconstruction approach. Finally, MCs are detected based on their distributions feature. Experiments are performed on 138 clinical mammograms. The proposed method is capable of detecting 92.9% of true microcalcification clusters with an average of 0.08 false microcalcification clusters detected per image.
A Time-Varying Seasonal Autoregressive Model-Based Prediction of Respiratory Motion for Tumor following Radiotherapy Peer-reviewed

Kei Ichiji, Noriyasu Homma, Masao Sakai, Yuichiro Narita, Yoshihiro Takai, Xiaoyong Zhang, Makoto Abe, Norihiro Sugita, Makoto Yoshizawa

COMPUTATIONAL AND MATHEMATICAL METHODS IN MEDICINE　2013　390325-1-390325-9　2013

DOI： 10.1155/2013/390325 　

ISSN： 1748-670X
Physiological Evaluation of Visually Induced Motion Sickness Using Independent Component Analysis of Photoplethysmogram Peer-reviewed

Makoto ABE, Makoto YOSHIZAWA, Norihiro SUGITA, Akira TANAKA, Noriyasu HOMMA, Tomoyuki YAMBE, Shin-ichi NITTA

Advanced Biomedical Engineering　2　(0)　25-31　2013
Publisher: Japanese Society for Medical and Biological Engineering
DOI： 10.14326/abe.2.25 　

eISSN： 2187-5219
Expansion capsules for diet control with artificial organ technology Peer-reviewed

Tomoyuki Yambe, Yasuyuki Shiraishi, Hidekazu Miura, Norihiro Sugita, Makoto Yoshizawa

Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS　5739-5742　2013

DOI： 10.1109/EMBC.2013.6610854 　

ISSN： 1557-170X
Telemedicine with Electric doctor's bag and the quantitative evaluation of the radial pulse wave to prevent cardiovascular event in Sendai Quake Peer-reviewed

Tomoyuki Yambe, Hidekazu Miura, Yasuyuki Shiraishi, Muneichi Shibata, Makoto Yoshizawa, Norihiro Sugita

2013 IEEE Region 10 Humanitarian Technology Conference, R10-HTC 2013　47-52　2013

DOI： 10.1109/R10-HTC.2013.6669012 　
Evaluation of motor performances of hemiplegic patients using a virtual cycling wheelchair: An exploratory trial Peer-reviewed

Norihiro Sugita, Makoto Yoshizawa, Yoshihisa Kojima, Makoto Abe, Noriyasu Homma, Kazunori Seki, Nobuyasu Handa

Computational and Mathematical Methods in Medicine　2013　512965-1-512965-6　2013

DOI： 10.1155/2013/512965 　

ISSN： 1748-670X 1748-6718
Markerless Lung Tumor Motion Tracking by Dynamic Decomposition of X-Ray Image Intensity. International-journal Peer-reviewed

Noriyasu Homma, Yoshihiro Takai, Haruna Endo, Kei Ichiji, Yuichiro Narita, Xiaoyong Zhang, Masao Sakai, Makoto Osanai, Makoto Abe, Norihiro Sugita, Makoto Yoshizawa

Journal of medical engineering　2013　340821-340821　2013

DOI： 10.1155/2013/340821 　

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We propose a new markerless tracking technique of lung tumor motion by using an X-ray fluoroscopic image sequence for real-time image-guided radiation therapy (IGRT). A core innovation of the new technique is to extract a moving tumor intensity component from the fluoroscopic image intensity. The fluoroscopic intensity is the superimposition of intensity components of all the structures passed through by the X-ray. The tumor can then be extracted by decomposing the fluoroscopic intensity into the tumor intensity component and the others. The decomposition problem for more than two structures is ill posed, but it can be transformed into a well-posed one by temporally accumulating constraints that must be satisfied by the decomposed moving tumor component and the rest of the intensity components. The extracted tumor image can then be used to achieve accurate tumor motion tracking without implanted markers that are widely used in the current tracking techniques. The performance evaluation showed that the extraction error was sufficiently small and the extracted tumor tracking achieved a high and sufficient accuracy less than 1 mm for clinical datasets. These results clearly demonstrate the usefulness of the proposed method for markerless tumor motion tracking.
Virtual Walking System for Smart Aging Peer-reviewed

Norihiro Sugita, Ryota Sugihara, Makoto Yoshizawa, Noriyasu Homma, Makoto Abe, Ryuta Kawashima

Transactions of the Virtual Reality Society of Japan　17　(4)　497-504　2012/12
Publisher: THE VIRTUAL REALITY SOCIETY OF JAPAN
DOI： 10.18974/tvrsj.17.4_497 　

ISSN： 1344-011X

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In this study, a novel virtual walking system has been developed for putting the concept of advocating a positive acceptance of the later stages of life or aging, called smart aging, into practice. An essential core of the system can be found in striking the right balance between virtual and real worlds for old people to use pleasantly and safely. The system consists of a laptop computer, micro-projectors, and a completely new screen system mounted on the walking frame, called "walking frame mounted display (WFMD)." Users can physically walk with pleasure by the virtual reality technology and safely by the WFMD in the virtual environment. Furthermore, the WFMD does not require any sensors to be worn and is sufficiently inexpensive for home use. Comparison of experimental results clearly demonstrates that the real walking in a virtual environment using the WFMD is easier to use for old people than stamping their feet on the "Wii balance board" in the same environment.
Application of a Telemedical Tool in an Isolated Island and a Disaster Area of the Great East Japan Earthquake Peer-reviewed

Makoto Yoshizawa, Tomoyuki Yambe, Norihiro Sugita, Satoshi Konno, Makoto Abe, Noriyasu Homma, Futoshi Takei, Katsuhiko Yokota, Yoshifumi Saijo, Shin-ichi Nitta

IEICE TRANSACTIONS ON COMMUNICATIONS　E95B　(10)　3067-3073　2012/10

DOI： 10.1587/transcom.E95.B.3067 　

ISSN： 0916-8516

eISSN： 1745-1345
New implantable therapeutic device for the control of an atrial fibrillation attack using the Peltier element Peer-reviewed

TomoyukiYambe, Taketada Sumiyoshi, Chihiro Koga, Yasuyuki Shiraishi, Hidekazu Miura, Norihiro Sugita, Akira Tanaka, Makoto Yoshizawa

2012 Annual International Conference of the IEEE Engineering in Medicine and Biology Society　5741-5744　2012/08

DOI： 10.1109/embc.2012.6347298 　

ISSN： 1557-170X
Tumor image extraction from fluoroscopy for a markerless lung tumor motion tracking and prediction Peer-reviewed

Noriyasu Homma, Keita Ishihara, Yoshihiro Takai, Haruna Endo, Kei Ichiji, Masao Sakai, Yuichiro Narita, Makoto Abe, Norihiro Sugita, Makoto Yoshizawa

Medical Imaging 2012: Image-Guided Procedures, Robotic Interventions, and Modeling　2012/02/23

DOI： 10.1117/12.911960 　

ISSN： 0277-786X
Telemedicine System Necessary in Disaster Areas Peer-reviewed

Norihiro Sugita, Makoto Yoshizawa, Hitoshi Kawata, Tomoyuki Yambe, Satoshi Konno, Yoshifumi Saijo, Makoto Abe, Noriyasu Homma, Shin-ichi Nitta

2012 PROCEEDINGS OF SICE ANNUAL CONFERENCE (SICE)　1661-1664　2012
Evaluation of Autonomic Nervous Function for Elderly People Using Electrocardiogram and Plethysmogram Peer-reviewed

Makoto Yoshizawa, Norihiro Sugita, Makoto Abe, Noriyasu Homma, Satoshi Konno, Tomoyuki Yambe, Shin-ichi Nitta

2012 PROCEEDINGS OF SICE ANNUAL CONFERENCE (SICE)　1665-1668　2012
Lung Tumor Motion Estimation Using 3-D Phase Correlation for Radiotherapy Treatment Peer-reviewed

Xiaoyong Zhang, Noriyasu Homma, Yoshihiro Takai, Yuichiro Narita, Makoto Abe, Norihiro Sugita, Makoto Yoshizawa

2012 PROCEEDINGS OF SICE ANNUAL CONFERENCE (SICE)　754-758　2012
DoG-Based Detection of Architectural Distortion in Mammographic Images for Computer-Aided Detection Peer-reviewed

Takeshi Handa, Xiaoyong Zhang, Noriyasu Homma, Tadashi Ishibashi, Yusuke Kawasumi, Makoto Abe, Norihiro Sugita, Makoto Yoshizawa

2012 PROCEEDINGS OF SICE ANNUAL CONFERENCE (SICE)　762-767　2012
Development of a Virtual Reality System to Evaluate Skills Needed to Drive a Cycling Wheel-Chair Peer-reviewed

Norihiro Sugita, Yoshihisa Kojima, Makoto Yoshizawa, Akira Tanaka, Makoto Abe, Noriyasu Homma, Kazunori Seki, Nobuyasu Handa

2012 ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY (EMBC)　6019-6022　2012

DOI： 10.1109/EMBC.2012.6347366 　

ISSN： 1557-170X
Respiratory Motion Prediction for Tumor Following Radiotherapy by using Time-variant Seasonal Autoregressive Techniques Peer-reviewed

Kei Ichiji, Noriyasu Homma, Masao Sakai, Yoshihiro Takai, Yuichiro Narita, Mokoto Abe, Norihiro Sugita, Makoto Yoshizawa

2012 ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY (EMBC)　6028-6031　2012

DOI： 10.1109/EMBC.2012.6347368 　

ISSN： 1557-170X
Improving detection algorithm of life-threatening arrhythmias for implementation of implantable cardioverter-defibrillators Peer-reviewed

Makoto Abe, Makoto Yoshizawa, Telma Keiko Sugai, Noriyasu Homma, Norihiro Sugita, Kazuo Shimizu, Moe Goto, Masashi Inagaki, Masaru Sugimachi, Kenji Sunagawa

IEEJ Transactions on Electronics, Information and Systems　132　(12)　1943-1948　2012
Publisher: Institute of Electrical Engineers of Japan
DOI： 10.1541/ieejeiss.132.1943 　

ISSN： 1348-8155 0385-4221
植込み型除細動器用致死性不整脈検出アルゴリズムの高速・高精度化 Peer-reviewed

阿部誠, テルマ・ケイコ・スガイ, 吉澤誠, 本間経康, 杉田典大, 清水一夫, 後藤萌, 稲垣正司, 杉町勝, 砂川賢二

Transactions of the Japanese Society for Medical and Biological Engineering　49　(6)　932-938　2011/12/10
Publisher: Japanese Society for Medical and Biological Engineering
DOI： 10.11239/jsmbe.49.932 　

ISSN： 1347-443X

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The implantable cardioverter-defibrillator (ICD) is an effective therapeutic device for rescuing patients with cardiac diseases from death caused by life-threatening arrhythmias. The authors previously have proposed a detection algorithm of life-threatening arrhythmia with a multiple regression model. In this research, we have developed the algorithm so as to accurately classify cardiac rhythms and to reduce in the computational time with a microcontroller used in the ICD. The experimental results showed that the proposed method kept a high accuracy to detect cardiac rhythms. In addition, the validation of implementation of the proposed algorithm in the microcontroller indicated that the result of detection of cardiac rhythms could be attained within computational time of 60 ms. For the practical application, it is necessary to evaluate the power consumption of the ICD working with the proposed method.
Evaluation of temporal relationship between a physiological index and a subjective score using average mutual information Peer-reviewed

Norihiro Sugita, Makoto Yoshizawa, Akira Tanaka, Makoto Abe, Noriyasu Homma, Shigeru Chiba, Tomoyuki Yambe, Shin-ichi Nitta

DISPLAYS　32　(4)　201-208　2011/10

DOI： 10.1016/j.displa.2011.04.003 　

ISSN： 0141-9382

eISSN： 1872-7387
Methods for assessment of effects of habitual exercise on the autonomic nervous function using plethysmogram Peer-reviewed

Makoto Yoshizawa, Norihiro Sugita, Tomoyuki Yambe, Satoshi Konno, Telma Keiko Sugai, Makoto Abe, Noriyasu Homma

2011 Annual International Conference of the IEEE Engineering in Medicine and Biology Society　1157-1160　2011/08

DOI： 10.1109/iembs.2011.6090271 　

ISSN： 1557-170X
Changes of Blood Flow Volume in the Superior Mesenteric Artery and Brachial Artery with Abdominal Thermal Stimulation Peer-reviewed

Shin Takayama, Takashi Seki, Masashi Watanabe, Shigeru Takashima, Norihiro Sugita, Satoshi Konno, Takashi Takeda, Hiroyuki Arai, Tomoyuki Yambe, Nobuo Yaegashi, Makoto Yoshizawa, Shigenao Maruyama, Shin-Ichi Nitta

EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE　2011　1-10　2011

DOI： 10.1093/ecam/nep110 　

ISSN： 1741-427X

eISSN： 1741-4288
Estimation of baroreflex function using independent component analysis of photoplethysmography Peer-reviewed

Makoto Abe, Makoto Yoshizawa, Norihiro Sugita, Akira Tanaka, Noriyasu Homma, Tomoyuki Yambe, Shin-Ichi Nitta

IEEJ Transactions on Electronics, Information and Systems　131　(9)　1540-1546　2011
Publisher: Institute of Electrical Engineers of Japan
DOI： 10.1541/ieejeiss.131.1540 　

ISSN： 1348-8155 0385-4221
電子診療鞄の展開と評価 Peer-reviewed

杉田典大, 吉澤誠, 山家智之, 西條芳文, 金野敏, 仁田新一

日本遠隔医療学会雑誌　6　(2)　207-210　2010/09/20
Dynamic characteristics between the subjective score of motion sickness discomfort and video global motion Peer-reviewed

Akira Tanaka, Norihiro Sugita, Makoto Yoshizawa, Makoto Abe, Tomoyuki Yambe

2010 Annual International Conference of the IEEE Engineering in Medicine and Biology　4　1368-1369　2010/08

DOI： 10.1109/iembs.2010.5626739 　

ISSN： 1557-170X
A mobile communications system for home-visit medical services: The Electronic Doctor's Bag Peer-reviewed

M Yoshizawa, T Yambe, S Konno, Y Saijo, N Sugita, T K Sugai, M Abe, T Sonobe, Y Katahira, S Nitta

2010 Annual International Conference of the IEEE Engineering in Medicine and Biology　2010/08

DOI： 10.1109/iembs.2010.5626577 　

ISSN： 1557-170X
Brief Effect of Acupuncture on the Peripheral Arterial System of the Upper Limb and Systemic Hemodynamics in Humans Peer-reviewed

Shin Takayama, Takashi Seki, Masashi Watanabe, Yasutake Monma, San Yue Yang, Norihiro Sugita, Satoshi Konno, Yoshifumi Saijo, Tomoyuki Yambe, Nobuo Yaegashi, Makoto Yoshizawa, Shin-ichi Nitta

JOURNAL OF ALTERNATIVE AND COMPLEMENTARY MEDICINE　16　(7)　707-713　2010/07

DOI： 10.1089/acm.2009.0355 　

ISSN： 1075-5535

eISSN： 1557-7708
RADIAL ARTERY HEMODYNAMIC CHANGES RELATED TO ACUPUNCTURE Peer-reviewed

Shin Takayama, Takashi Seki, Norihiro Sugita, Satoshi Konno, Hiroyuki Arai, Yoshifumi Saijo, Tomoyuki Yambe, Nobuo Yaegashi, Makoto Yoshizawa, Shin-ichi Nitta

EXPLORE-THE JOURNAL OF SCIENCE AND HEALING　6　(2)　100-105　2010/03

DOI： 10.1016/j.explore.2009.12.001 　

ISSN： 1550-8307

eISSN： 1878-7541
Quantitative Evaluation of Autonomic Nervous Activity using Independent Component Analysis for Photoplethysmographic Signal

Abe M, Yoshizawa M, Sugita N, Tanaka A, Chiba S, Yambe T, Nitta S

5th International Symposium on Medical, Bio- and Nano-Electronics　99-100　2010/02
Pulse Transmission Time based on Temporal Difference in the Instantaneous Phase between Electrocardiogram and Photoplethysmogram Signals Peer-reviewed

Masayuki Murakoshi, Makoto Yoshizawa, Norihiro Sugita, Makoto Abe, Noriyuki Homma, Tomoyuki Yambe, Shin-ichi Nitta

Proc. of The Fifteenth International Symposium on Artificial Life and Robotics　489-492　2010/02
Estimation of Blood Pressure Variability from the Temporal Difference

Norihiro Sugita, Makoto Yoshizawa, Masayuki Murakoshi, Makoto Abe, Noriyasu Homma, Tomoyuki Yambe, Shin-ichi Nitta

5th International Symposium on Medical, Bio- and Nano-Electronics　23-27　2010/02
The effect of viewing 3D images on autonomic circulatory regulations

Akira Tanaka, Norihiro Sugita, Makoto Yoshizawa

Neuro-Ophthalmology Japan　27　(4)　372-380　2010

ISSN： 0289-7024
The Effect of Warming of the Abdomen and of Herbal Medicine on Superior Mesenteric Artery Blood Flow - a Pilot Study Peer-reviewed

Shin Takayama, Takashi Seki, Masashi Watanabe, Shigeru Takashima, Norihiro Sugita, Satoshi Konno, Koh Iwasaki, Tomoyuki Yambe, Makoto Yoshizawa, Shin-ichi Nitta, Shigenao Maruyama, Nobuo Yaegashi

FORSCHENDE KOMPLEMENTARMEDIZIN　17　(4)　195-201　2010

DOI： 10.1159/000317845 　

ISSN： 1661-4119

eISSN： 1661-4127
Extraction of the Mayer wave component in blood pressure from the instantaneous phase difference between electrocardiograms and photoplethysmograms Peer-reviewed

Norihiro Sugita, Makoto Yoshizawa, Masayuki Murakoshi, Makoto Abe, Noriyasu Homma, Tomoyuki Yambe, Shin-ichi Nitta

Artificial Life and Robotics　15　(4)　522-525　2010

DOI： 10.1007/s10015-010-0861-0 　

ISSN： 1433-5298 1614-7456
Human brain activities related to manual control of a nonholonomic system Peer-reviewed

Noriyasu Homma, Shinpei Kato, Takakuni Goto, Masao Sasaki, Norihiro Sugita, Makoto Yoshizawa, Yukihito Yomogida, Yuko Sassa, Motoaki Sugiura, Jorge Reira, Ryuta Kawashima

International Journal of Advanced Computer Engineering　2　(2)　129-133　2009/12
Baroreflex Sensitivity of an Arterial Wall During Rotary Blood Pump Assistance Peer-reviewed

Tomoyuki Yambe, Kou Imachi, Yasuyuki Shiraishi, Tasuku Yamaguchi, Mune‐ichi Shibata, Takeshi Kameyama, Makoto Yoshizawa, Norihiro Sugita

Artificial Organs　33　(9)　767-770　2009/09/17

DOI： 10.1111/j.1525-1594.2009.00864.x 　

ISSN： 0160-564X

eISSN： 1525-1594
Estimation of blood pressure variability using independent component analysis of photoplethysmographic signal Peer-reviewed

Makoto Abe, Makoto Yoshizawa, Norihiro Sugita, Akira Tanaka, Shigeru Chiba, Tomoyuki Yambe, Shin-ichi Nitta

2009 Annual International Conference of the IEEE Engineering in Medicine and Biology Society　348-351　2009/09

DOI： 10.1109/iembs.2009.5333155 　

ISSN： 1557-170X
A Method for Calculating Pulse Transmission Time Based on Low Rate-Sampled Electrocardiogram and Plethysmogram

Masayuki Murakoshi, Makoto Yoshizawa, Norihiro Sugita, Makoto Abe, Akira Tanaka, Tomoyuki Yambe, Shin-ichi Nitta

4th International Symposium on Medical, Bio- and Nano-Electronics　83-84　2009/03

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Sendai, Japan
多次元の血圧反射機能感受性定量診断 Peer-reviewed

山家智之, 金野敏, 西條芳文, 白石泰之, 仁田新一, 上月正博, 吉澤誠, 杉田典大, 田中明, 山口済, 片平美明, 秋野能久, 柴田宗一, 渡辺誠, 三引義明, 大沢上, 佐藤尚

心臓リハビリテーション　14　(1)　108-114　2009/02/10
QUANTITATIVE EVALUATION OF EFFECTS OF VISUALLY INDUCED MOTION SICKNESS USING PHOTOPLETHYSMOGRAPHY Peer-reviewed

MAKOTO ABE, MAKOTO YOSHIZAWA, NORIHIRO SUGITA, AKIRA TANAKA, SHIGERU CHIBA, TOMOYUKI YAMBE, SHIN-ICHI NITTA

Nano-Biomedical Engineering 2009　411-419　2009/02
Publisher: PUBLISHED BY IMPERIAL COLLEGE PRESS AND DISTRIBUTED BY WORLD SCIENTIFIC PUBLISHING CO.
DOI： 10.1142/9781848163539_0043 　
Clinical research on the accuracy in determining the pulse wave rising point

T. Yambe, Y. Shiraishi, Y. Saijo, H. Liu, S. Nitta, K. Imachi, A. Baba, T. Yamaguchi, S. Sugawara, Y. Katahira, N. Ohsawa, Y. Mibiki, M. Watanabe, M. Shibata, N. Sato, T. Kameyama, N. Akino, M. Munakata, M. Honda, M. Yoshizawa, N. Sugita

Scripta Medica Facultatis Medicae Universitatis Brunensis Masarykianae　82　(3)　164-174　2009

ISSN： 1211-3395
Relationship between Physiological Indices and a Subjective Score in Evaluating Visually Induced Motion Sickness Peer-reviewed

Norihiro Sugita, Makoto Yoshizawa, Akira Tanaka, Makoto Abe, Shigeru Chiba, Tomoyuki Yambe, Shin-ichi Nitta

Lecture Notes in Computer Science　114-119　2009

DOI： 10.1007/978-3-642-02771-0_13 　

ISSN： 0302-9743

eISSN： 1611-3349
Development of new quantitative diagnosis machine to evaluate the Baroreflex sensitivity of an artery for patients with hypertension Peer-reviewed

Tomoyuki Yambe, Norihiro Sugita, Makoto Yoshizawa

2009 ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY, VOLS 1-20　888-+　2009

DOI： 10.1109/IEMBS.2009.5332644 　

ISSN： 1557-170X
The Herbal Medicine Daikenchuto Increases Blood Flow in the Superior Mesenteric Artery Peer-reviewed

Shin Takayama, Takashi Seki, Masashi Watanabe, Yasutake Monma, Norihiro Sugita, Satoshi Konno, Koh Iwasaki, Takashi Takeda, Tomoyuki Yambe, Makoto Yoshizawa, Shin-ichi Nitta, Nobuo Yaegashi

The Tohoku Journal of Experimental Medicine　219　(4)　319-330　2009

DOI： 10.1620/tjem.219.319 　

ISSN： 0040-8727

eISSN： 1349-3329
Quantitativeevaluation of the baroreflex sensitivity of an artery Peer-reviewed

T. Yambe, Y. Shiraishi, Y. Saijo, H. Liu, S. Nitta, K. Imachi, A. Baba, T. Yamaguchi, S. Sugawara, Y. Katahira, N. Ohsawa, Y. Mibiki, M. Watanabe, M. Shibata, N. Sato, T. Kameyama, N. Akino, M. Munakata, M. Honada, M. Yoshizawa, N. Sugita

SCRIPTA MEDICA (BRNO)　81　(4)　249-260　2008/12
Comparison of maximum cross-correlation coefficient between blood pressure and heart rate with traditional index associated with baroreflex sensitivity Peer-reviewed

Norihiro Sugita, Makoto Yoshizawa, Makoto Abe, Akira Tanaka, Shigeru Chiba, Tomoyuki Yambe, Shin-ichi Nitta

2008 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society　2574-2577　2008/08

DOI： 10.1109/iembs.2008.4649726 　

ISSN： 1557-170X
A method for evaluating effects of visually-induced motion sickness using ICA for photoplethysmography Peer-reviewed

Makoto Abe, Makoto Yoshizawa, Norihiro Sugita, Akira Tanaka, Shigeru Chiba, Tomoyuki Yambe, Shin-ichi Nitta

2008 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society　4591-4594　2008/08

DOI： 10.1109/iembs.2008.4650235 　

ISSN： 1557-170X
Interpolation of the subjective score of visually-induced motion sickness by using physiological parameters Peer-reviewed

Akira Tanaka, Norihiro Sugita, Makoto Yoshizawa, Makoto Abe, Tomoyuki Yambe

2008 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society　4595-4596　2008/08

DOI： 10.1109/iembs.2008.4650236 　

ISSN： 1557-170X
光電容積脈波を用いた映像酔いの生体影響評価 Peer-reviewed

阿部誠, 吉澤誠, 杉田典大, 田中明, 千葉滋, 山家智之, 仁田新一

The Transactions of Human Interface Society　10　(2)　69-76　2008/05
Quantitative evaluation of effects of visually-induced motion sickness based on causal coherence functions between blood pressure and heart rate Peer-reviewed

N. Sugita, M. Yoshizawa, A. Tanaka, K. Abe, S. Chiba, T. Yambe, S. Nitta

DISPLAYS　29　(2)　167-175　2008/03

DOI： 10.1016/j.dispia.2007.09.017 　

ISSN： 0141-9382

eISSN： 1872-7387
Assessment of Effects of Visually-induced Motion Sickness Using Physiological Index Obtained from Photoplethysmography Peer-reviewed

Makoto Abe, Makoto Yoshizawa, Norihiro Sugita, Akira Tanaka, Shigeru Chiba, Tomoyuki Yambe, Shin-ichi Nitta

Proc. of the 1st International Symposium on Visually Induced Motion Sickness, Figure, and Photosensitive Epileptic Seizures　139-144　2007/12/10
脈波伝播速度と加齢に関する国際共同研究

山家智之, 杉田典大, 吉澤誠, MilyaginViktor

日本臨床生理学会雑誌　37　(5)　76-76　2007/10
病態生理心血管調節の機構血圧反射システムを介した血管調節機構の定量診断装置の開発

山家智之, 杉田典大, 吉澤誠

日本臨床生理学会雑誌　37　(5)　66-66　2007/10
A pilot study on pupillary and cardiovascular changes induced by stereoscopic video movies Peer-reviewed

Hiroshi Oyamada, Atsuhiko Iijima, Akira Tanaka, Kazuhiko Ukai, Haruo Toda, Norihiro Sugita, Makoto Yoshizawa, Takehiko Bando

JOURNAL OF NEUROENGINEERING AND REHABILITATION　4　(37)　2007/10

DOI： 10.1186/1743-0003-4-37 　

ISSN： 1743-0003
Evaluation of adaptation to visually induced motion sickness based on the maximum cross-correlation between pulse transmission time and heart rate Peer-reviewed

Norihiro Sugita, Makoto Yoshizawa, Makoto Abe, Akira Tanaka, Takashi Watanabe, Shigeru Chiba, Tomoyuki Yambe, Shin-ichi Nitta

JOURNAL OF NEUROENGINEERING AND REHABILITATION　4　(35)　2007/09

DOI： 10.1186/1743-0003-4-35 　

ISSN： 1743-0003
Estimation of Effects of Visually-Induced Motion Sickness Using Independent Component Analysis Peer-reviewed

Makoto Abe, Makoto Yoshizawa, Norihiro Sugita, Akira Tanaka, Shigeru Chiba, Tomoyuki Yambe, Shin-ichi Nitta

2007 29th Annual International Conference of the IEEE Engineering in Medicine and Biology Society　5501-5504　2007/08

DOI： 10.1109/iembs.2007.4353591 　

ISSN： 1557-170X
Pre-hypertension(前高血圧)の病態と臨床的意義新しい動脈の血圧反射機能感受性診断装置の発明による高血圧の発症予測

山家智之, 吉澤誠, 杉田典大, 田中明

Journal of Cardiology　50　(Suppl.I)　149-149　2007/08
Publisher:
ISSN： 0914-5087
Evaluation of Adaptation to Visually Induced Motion Sickness by Using Physiological Index Associated with Baroreflex Function Peer-reviewed

Norihiro Sugita, Makoto Yoshizawa, Makoto Abe, Akira Tanaka, Shigeru Chiba, Tomoyuki Yambe, Shin-ichi Nitta

2007 29th Annual International Conference of the IEEE Engineering in Medicine and Biology Society　303-306　2007/08

DOI： 10.1109/iembs.2007.4352284 　

ISSN： 1557-170X
光電容積脈波の独立成分分析を用いた映像酔いの評価法(3.2 第5回情報シナジー研究会, 3. 研究活動報告)—A Method for Estimation of Visually-Induced Motion Sickness Using IndependentComponent Analysis for Photoplethysmography

阿部, 誠, 吉澤, 誠, 杉田, 典大, 田中, 明, 千葉, 滋, 山家, 智之, 仁田, 新一

年報　6　101-106　2007/07
Publisher: 東北大学情報シナジーセンター

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紀要類 (bulletin)
動脈の血圧反射機能感受性診断装置の発明 Peer-reviewed

山家智之, 川田浩, 丸山満也, 金野敏, 西條芳文, 白石泰之, 仁田新一, 吉澤誠, 杉田典大, 田中明, 宗像正徳, 山口佑, 片平美明, 秋野能久, 本多正久, 柴田宗一, 渡辺誠, 三引義明, 大沢上, 佐藤尚

東北医学雑誌　119　(1)　73-77　2007/06/25
Evaluation of adaptation to visually induced motion sickness by using physiological index associated with baroreflex function Peer-reviewed

Norihiro Sugita, Makoto Yoshizawa, Makoto Abe, Akira Tanaka, Shigeru Chiba, Tomoyuki Yambe, Shin-ichi Nitta

2007 ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY, VOLS 1-16　303-+　2007

ISSN： 1094-687X
Independent Component Analysis of Finger Photoplethysmography for Evaluating Effects of Visually-Induced Motion Sickness Peer-reviewed

Makoto Abe, Makoto Yoshizawa, Norihiro Sugita, Akira Tanaka, Shigeru Chiba, Tomoyuki Yambe, Shin-ichi Nitta

Lecture Notes in Computer Science　177-184　2007

DOI： 10.1007/978-3-540-73335-5_20 　

ISSN： 0302-9743

eISSN： 1611-3349
Autonomic nervous activity revealed by a new physiological index rho(max) based on cross-correlation between mayer-wave components of blood pressure and heart rate

Akira Tanaka, Norihiro Sugita, Makoto Yoshizawa, Yasuyuki Shiraishi, Tomoyuki Yambe, Shin-Ichi Nitta

2006 SICE-ICASE INTERNATIONAL JOINT CONFERENCE, VOLS 1-13　4352-+　2006
Physiological evaluation of effects of visually-induced motion sickness using finger photoplethysmography

Makoto Abe, Makoto Yoshizawa, Norihiro Sugita, Akira Tanaka, Shigeru Chiba, Tomoyuki Yambe, Shin-ichi Nitta

2006 SICE-ICASE INTERNATIONAL JOINT CONFERENCE, VOLS 1-13　5252-+　2006

DOI： 10.1109/SICE.2006.315499 　
Assessment of biological effect of minimal acupuncture using causal coherence function between blood pressure and heart rate

Norihiro Sugita, Takashi Seki, Makoto Yoshizawa, Makoto Abe, Akira Tanaka, Ken-ichi Abe, Tomoyuki Yambe, Shin-ichi Nitta

2006 SICE-ICASE INTERNATIONAL JOINT CONFERENCE, VOLS 1-13　538-+　2006

DOI： 10.1109/SICE.2006.314862 　
Biphasic Effect of Visually-induced Motion Sickness Revealed by Time-Varying Correlation of Autonomic Nervous System Peer-reviewed

Norihiro Sugita, Makoto Yoshizawa, Makoto Abe, Akira Tanaka, Tomoyuki Yambe, Shin-ichi Nitta, Shigeru Chiba

The 11th International Conference on Human-Computer Interaction　CD-ROM　2005/07/22
Evaluation of the Effect of Visual Stimulation on Humans by Simultaneous Experiment with Multiple Subjects Peer-reviewed

Norihiro Sugita, Makoto Yoshizawa, Akira Tanaka, Ken-Ichi Abe, Shigeru Chiba, Tomoyuki Yambe, Shin-Ichi Nitta

2005 IEEE Engineering in Medicine and Biology 27th Annual Conference　5572-5575　2005
Publisher: IEEE
DOI： 10.1109/iembs.2005.1615747 　

ISSN： 0589-1019
Biphasic Response of Autonomic Nervous System to Visually-lnduced Motion Sickness Peer-reviewed

Norihiro Sugita, Makoto Yoshizawa, Akira Tanaka, Ken-ichi Abe, Tomoyuki Yambe, Shin-ichi Nitta, Shigeru Chiba

Transactions of the Virtual Reality Society of Japan　9　(4)　369-375　2004/12
Publisher: THE VIRTUAL REALITY SOCIETY OF JAPAN
DOI： 10.18974/tvrsj.9.4_369 　

ISSN： 1344-011X

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To quantitatively assess the effect of visually-induced motion sickness, a swaying motion picture was shown to 55 subjects, and their maximum cross-correlation coefficient (ρmax) between Mayer wave-related component in blood pressure variability and that in heart rate variability was analyzed. The physiological index ρmax reflects the state of baroreflex function governed by the autonomic nervous system. In the case of the subject group with extremely high total score in the simulator sickness questionnaire (SSQ), the decrease in ρmax could be observed at two positions in time, i.e., around one minute and around ten minutes after the beginning of presentation. Such biphasic response can lead to the hypothesis that the symptom caused by visually-induced motion sickness can be divided into two parts: the reflective response to avoid the unpleasant visual image and the cumulative symptom corresponding to feeling of sickness. To verify this hypothesis, an unpleasant video film including surgical operation and no swaying scenes was presented to the same subjects. The comparison between the swaying video and the unpleasant video showed that the responses of ρmax were partly similar to each other in the case of the subject group with high self-evaluated susceptibility to motion sickness.
Quantitative evaluation of the effect of visually-induced motion sickness using causal coherence function between blood pressure and heart rate Peer-reviewed

Norihiro Sugita, Makoto Yoshizawa, Akira Tanaka, Ken-ichi Abe, Shigeru Chiba, Tomoyuki Yambe, Shin-ichi Nitta

The 26th Annual International Conference of the IEEE Engineering in Medicine and Biology Society　2407-2410　2004/09

DOI： 10.1109/iembs.2004.1403696 　

ISSN： 1094-687X
Assessment of emotional reaction induced by visual stimulation based on cross-correlation between pulse wave transmission time and heart rate in the Mayer wave-band Peer-reviewed

Makoto Yoshizawa, Norihiro Sugita, Akira Tanaka, Tatsuya Masuda, Ken-ichi. Abe, Shigeru Chiba, Tomoyuki Yambe, Shin-ichi Nitta

The 26th Annual International Conference of the IEEE Engineering in Medicine and Biology Society　2411-2414　2004/09

DOI： 10.1109/iembs.2004.1403697 　

ISSN： 1094-687X
Mayer波帯における脈波伝播時間−心拍数間の相互相関を用いた情動反応の定量化 Peer-reviewed

吉澤誠, 杉田典大, 田中明, 増田達也, 阿部健一, 山家智之, 仁田新一

循環制御　25　(1)　41-49　2004/07/27

DOI： 10.11312/ccm.25.41 　
Assessment of effects of visually-induced motion sickness based on nonlinearity of baroreflex system: For standardization of visual image safety Peer-reviewed

Makoto Yoshizawa, Norihiro Sugita, Akira Tanaka, Ken-ichi Abe, Tomoyuki Yambe, Shin-ichi Nitta, Shigeru Chiba

Proc. of the CIE Midterm Meeting and International Lighting Congress　CD-ROM　2004/05/21
Assessment of emotional reaction induced by visual stimulation based on cross-correlation between pulse wave transmission time and heart rate in the mayer wave-band

Makoto Yoshizawa, Norihiro Sugita, Akira Tanaka, Tatsuya Masuda, Ken-Ichi Abe, Shigeru Chiba, Tomoyuki Yambe, Shin-Ichi Nitta

Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings　26　2411-2414　2004

ISSN： 0589-1019
Evaluation of the effect of visually-induced motion sickness based on pulse transmission time and heart rate

N Sugita, A Yoshizawa, A Tanaka, K Abe, T Yambe, S Nitta, S Chiba

SICE 2004 ANNUAL CONFERENCE, VOLS 1-3　2473-2476　2004
Quantitative Evaluation of Emotional Reaction Induced by Visual Stimulation Based on Cross-Correlation between Blood Pressure and Heart Rate Peer-reviewed

Norihiro Sugita, Makoto Yoshizawa, Akira Tanaka, Ken-ichi Abe, Tomoyuki Yambe, Shin-ichi Nitta

The 10th International Conference on Human-Computer Interaction　138-142　2003/06/22
Evaluation of biological effects of visual stimulation based on a portable measuring device for blood pressure and heart rate

N Sugita, M Yoshizawa, A Tanaka, T Masuda, K Abel, T Yambe, S Nitta

SICE 2003 ANNUAL CONFERENCE, VOLS 1-3　2030-2033　2003
Evaluation of Effect of Visual Stimulation on Human Based on Maximum Cross-Correlation Coefficient between Blood Pressure and Heart Rate Peer-reviewed

Norihiro Sugita, Makoto Yoshizawa, Akira Tanaka, Ken-ichi Abe, Tomoyuki Yambe, Shin-ichi Nitta

The Transactions of Human Interface Society　4　(4)　39-46　2002/03
Image generation that reflects physiological and psychological state in real time

N Sugita, M Yoshizawa, A Tanaka, K Abe, T Yambe, S Nitta

SICE 2002: PROCEEDINGS OF THE 41ST SICE ANNUAL CONFERENCE, VOLS 1-5　302-305　2002
Quantitative and physiological evaluation of three dimensional images Peer-reviewed

M Yoshizawa, N Sugita, A Tanaka, K Abe, T Yambe, S Nitta

VSMM 2001: SEVENTH INTERNATIONAL CONFERENCE ON VIRTUAL SYSTEMS AND MULTIMEDIA, PROCEEDINGS　864-871　2001

DOI： 10.1109/VSMM.2001.969762

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Misc. 40

Indoor localization by passively using Bluetooth radio waves without wearing a device

梅原優佑, 杉田典大, 市地慶, 本間経康

電子情報通信学会大会講演論文集(CD-ROM)　2023　2023

ISSN： 1349-144X
Saliency Map Visualization of Deep Learning for Alzheimer’s Disease Diagnosis Using PET Images

水野泰平, ZHANG X., ZHANG X., 市地慶, 杉田典大, 本間経康

インテリジェント・システム・シンポジウム(CD-ROM)　30th　2022
Estimation of organ motion from X-ray image sequences using particle filter for lung cancer radiotherpy

篠原匠, 市地慶, ZHANG X., ZHANG X., 杉田典大, 本間経康

インテリジェント・システム・シンポジウム(CD-ROM)　30th　2022
Reproducibility of Heart Rate Variability Indexes by 72-hour Continuous ECG Monitoring

湯田恵美, 金子格, 杉田典大, 酒井正夫, 吉澤誠, 早野順一郎, 早野順一郎

時間生物学　27　(2)　2021

ISSN： 1348-2025
Effect of discrete screen updating of panoramic images on spatial perceptio

31　(4)　24-27　2020/04
仮想環境でのリハビリテーション応用

杉田典大, 吉澤誠

電子情報通信学会誌　102　(8)　798-800　2019/08
血圧変動と血行状態をリアルタイムに表示する「魔法の鏡」

吉澤誠, 杉田典大

ネイチャーインタフェイス　75　7-9　2019
仮想環境と自律神経活動：健康安全を守る取り組みと自律神経活動を用いた評価

板東武彦, 田中明, 飯島淳彦, 杉田典大, 氏家弘裕

自律神経　55　(4)　262-268　2018
血行状態モニタリング装置“魔法の鏡”の開発

吉澤誠, 杉田典大

光技術コンタクト　55　(10)　4-11　2017/10
Publisher: 光学工業技術協会
ISSN： 0913-7289
Estimation of autonomic nervous activity using green light photoplethysmogram

116　(227)　29-34　2016/09/24
Publisher: 東京 : 電子情報通信学会
ISSN： 0913-5685
医工学的顔の望診~映像脈波による顔表面の血行動態解析~

田中明, 山田佑也, 杉田典大, 吉澤誠

日本統合医療学会誌　9　(3)　2016

ISSN： 2435-5372
Analysis of local pulse wave transit time in face using face video images

Yamada Yuya, Tanaka Akira, Sugita Norihiro, Yoshizawa Makoto

Transactions of Japanese Society for Medical and Biological Engineering　54　(27)　S216-S216　2016
Publisher: Japanese Society for Medical and Biological Engineering
DOI： 10.11239/jsmbe.54Annual.S216 　

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<p>Recently, it has been attracting attention that biological signal can be extracted from the changes in skin color tone of facial video image which obtained by an ordinary camera (e.g. web cam or phone camera). The aim of this study is to investigate the changes in features of pulse wave computed from facial image during cardiovascular regulation. In this study, right and left cheeks and lip sides were selected as regions of interest and video images of the ROIs were recorded at a frame rate of 250fps. Pulse waveform of each ROI was extracted from the changes in green color intensity of the ROI. In result, some indices such as difference of pulse transit time between two positions changed significantly under heating and exercising conditions. This result suggests that not only heart rate but also various indices of cardiovascular regulations can be obtained with non-contact from facial video image.</p>
Assessment of hip abduction in hemiplegic patients using cycling wheelchair

ISHIKAWA REMI, SUGITA NORIHIRO, ABE MAKOTO, YOSHIZAWA MAKOTO, SEKI KAZUNORI, HANDA YASUNOBU

Transactions of Japanese Society for Medical and Biological Engineering　53　S183_03-S183_03　2015
Publisher: Japanese Society for Medical and Biological Engineering
DOI： 10.11239/jsmbe.53.S183_03 　

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A cycling wheelchair (CWC) is a rehabilitation tool for hemiplegic patients. In previous studies, we proposed some indices to evaluate the motor function of the paralyzed leg of the patient driving a CWC. In this study, we focused on the involuntary leg abduction while rotating a CWC pedal, and proposed a new evaluation index based on the abduction motion. The leg abduction can be associated with motor dysfunction because it is due to the contracted muscles of the paralyzed leg. The proposed index requires signals from the gyro and accelerometer sensors attached to the shin of a CWC user. Based on these signals, the abduction angle and the knee position were estimated using a Kalman filter and a three-dimensional model of the leg, respectively. The proposed index is defined as the ratio between variances of the first and second main components of the leg motion trajectory. The main components were calculated by the principle component analysis. Experimental results obtained by employing healthy subjects, who imitated the leg abduction, showed that the proposed method is useful for evaluating the differences in the leg abduction patterns.
Estimation of Blood Pressure Variability from Body Video Images

OBARA KAZUMA, SUGITA NORIHIRO, ABE MAKOTO, YOSHIDA TOMOHISA, YOSHIZAWA MAKOTO

Transactions of Japanese Society for Medical and Biological Engineering　53　S129_02-S129_02　2015
Publisher: Japanese Society for Medical and Biological Engineering
DOI： 10.11239/jsmbe.53.S129_02 　

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Many studies have investigated the relationship between mental load and biological signals such as heart rate and blood pressure. In such studies, the experiments involved attaching sensors on the bodies of test subjects to measure biological signals. However, there are concerns regarding the additional psychological stress on the subjects caused by these sensors. To solve this problem, we propose a new non-contact method to measure not only heart rate but also blood pressure variability. In this method, the time delay is calculated between two pulse waves obtained from different parts of a subject's body captured by a video camera. This index is considered to have a negative correlation with blood pressure variability because it approximates the pulse transit time obtained from a photoplethysmograph. The proposed index was calculated from video images of 20 healthy subjects performing the Valsalva maneuver. The results showed that the correlation coefficient between blood pressure and the proposed index was approximately 0.6.
A Real-Time Homography-Based Algorithm for Markerless Deformable Lung Tumor Motion Tracking Using KV X-Ray Fluoroscopy

Zhang, X, Homma, N, Takai, Y, Ichiji, K, Sugita, N, Abe, M, Yoshizawa, M

MEDICAL PHYSICS　42　(6)　3656-3656　2015
A Kernel-Based Method for Non-Rigid Tumor Tracking in KV Image Sequence

X. Zhang, N. Homma, K. Ichiji, Y. Takai, Y. Narita, M. Abe, N. Sugita, M. Yoshizawa

MEDICAL PHYSICS　40　(6)　469　2013/06

DOI： 10.1118/1.4815509 　

ISSN： 0094-2405
Medical Responses Following the Sendai Quake (East Japan Earthquake, March 11, 2011)

Tomoyuki Yambe, Muneichi Shibata, Taketada Sumiyoshi, Yoshiaki Mibiki, Noboru Osawa, Yoshiaki Katahira, Minoru Yambe, Kou‐ichi Tabayashi, Masanori Yamashina, Eiji Sato, Shinichi Sato, Tetsuo Yagi, Makoto Watanabe, Yoshihira Akinno, Masanori Munakata, Naoki Owada, Masatoshi Akiyama, Yoshikatsu Saiki, Norihiro Sugita, Makoto Yoshizawa

Artificial Organs　36　(8)　760-763　2012/08/06

DOI： 10.1111/j.1525-1594.2012.01522.x 　

ISSN： 0160-564X

eISSN： 1525-1594
東日本大震災の中の大学と震災復興プロジェクト

吉澤誠, 山家智之, 杉田典大

日本バーチャルリアリティ学会誌　17　(1)　16-19　2012/03
Methods for Estimating a Cross-Correlation Index of the Baroreflex System by using a Plethysmography

Makoto Yoshizawa, Norihiro Sugita, Tomoyuki Yambe, Satoshi Konno, Telma Keiko Sugai, Makoto Abe, Noriyasu Homma, Shin-ichi Nitta

Nano-Biomedical Engineering 2012　566-576　2012
Department of Medical Engineering and Cardiology, Institute of Development, Aging and Cancer, Tohoku University in East Japan Earthquake

YAMBE Tomoyuki, SHIGA Takuya, SHIBATA Mune-ichi, SATO Naoshi, KATAHIRA Yoshiaki, YAGI Testuo, MUNAKATA Masanori, AKINO Yoshihisa, OWADA Naoki, SUGITA Norihiro, YOSHIZAWA Makoto

he Autonomic nervous system　48　(6)　410-413　2011/12/15

ISSN： 0288-9250
情報通信技術 (ICT) は医療福祉問題の救世主か？

吉澤誠, 杉田典大, 阿部誠, 西條芳文, 本間経康, 金野敏, 山家智之, 仁田新一

生体医工学　49　(2)　387-389　2011/12
Publisher: Japanese Society for Medical and Biological Engineering
DOI： 10.11239/jsmbe.49.387 　

ISSN： 1347-443X
循環調節系の変化と3D映像視聴

田中明, 杉田典大, 吉澤誠, 山家智之

自律神経　48　(3)　211-213　2011/06
循環制御機能をコントロールすることができる乗用車の可能性の展開

山家智之, 金野敏, 白石泰之, 劉紅煎, 川島隆太, 阿部恒之, 杉田典大, 吉沢誠, 関隆志

循環制御　30　(3)　127-141　2010/05
診断治療機能を保持する自動車の可能性

山家智之, 金野敏, 白石泰之, 川島隆太, 阿部恒之, 杉田典大, 吉沢誠, 関隆志

日本臨床生理学会雑誌　40　(1)　5-14　2010
IT映像環境における健康リスクと自律神経機能評価：国際標準に向けて

板東武彦, 木竜徹, 飯島淳彦, 氏家弘裕, 吉澤誠, 田中明, 杉田典大, 斎田真也, 千葉滋, 鵜飼一彦

自律神経　46　(5)　427-431　2009/10

ISSN： 0288-9250
脈のない人工心臓と，脈の診断

山家智之, 白石泰之, 金野敏, 馬場篤志, 井街宏, 田林晄一, 西條芳文, 杉田典大, 吉沢誠, 上月博, 阿部裕輔, 斎藤逸郎, 磯山隆, 山崎健二, 北野智哉, 山崎俊一, 亀山剛義, 秋野能久, 山口済, 片平美明, 柴田宗一, 大沢上, 佐藤尚

宮城県医師会報　755　12　2008/12/01
ESH2008サテライト欧州における動脈スティッフネス計測標準化のための国際ミーティング―大学病院とプライベートクリニックにおける動脈硬化follow―

山家智之, 劉紅煎, 金野敏, 白石泰之, 宋虎振, 羅雲, 山口済, 片平美明, 柴田宗一, 大沢上, 杉田典大, 吉澤誠, 早瀬敏行, 上月正博, 宗像正徳, 張秀敏, I. A. Milyagina, J. Zaloudic, B. Fiser, J. Siegelova, P. Dobsak

エレクトロニクスの臨床（別冊）　1-13　2008/08/31
科学技術振興調整費プロジェクトを中心とした統合医療・代替医療の科学的評価研究の現状 (日本統合医療学会誌)

仁田新一, 金野敏, 山家智之, 関隆志, 杉田典大, 吉澤誠

日本統合医療学会誌　1　(1)　19-22　2008/07
統合医療の医工学的評価と今後の展開―鍼が循環系に及ぼす影響の制御工学的解釈―

吉澤誠, 関隆志, 杉田典大, 阿部誠, 田中明, 金野敏, 川田浩, 山家智之, 仁田新一

日本統合医療学会会誌　1　(1)　28-32　2008/07
Publisher: 日本統合医療学会
多変数制御装置としての循環中枢―心拍数調節と血管抵抗調節の役割分担―

吉澤誠, 杉田典大, 阿部誠, 田中明, 山家智之, 仁田新一

臨床脳波　50　(6)　347-353　2008/06/01
工学的アプローチによる統合医療の評価 (シンポジウム統合医療の評価私達の身体は統合医療を求めている)

吉澤誠, 関隆志, 杉田典大

日本統合医療学会誌　4　(1)　60-64　2008
Publisher: 日本統合医療学会
New quantitative diagnosis machine for the baroreflex sensitivity of the heart and the artery

T. Yambe, M. Munakata, K. Tabayashi, M. Yoshizawa, A. Tanaka, N. Sugita

JOURNAL OF HYPERTENSION　25　S303-S303　2007/06

ISSN： 0263-6352
工学的アプローチによる統合医療の評価―自律神経系指標ρmaxの適用例―

吉澤誠, 関隆志, 杉田典大, 阿部誠, 田中明, 金野敏, 川田浩, 山家智之, 仁田新一

統合医療　4　(1,2)　60-64　2007/04
相補・代替医療の研究③（医工学から）

治療　89　700-707　2007
Publisher: 南山堂
ISSN： 0022-5207
Invention of the new diagnosis tool for the quantitative evaluation of the baroreflex sensitivity

Tomoyuki Yambe, Makoto Yoshizawa, Norihiro Sugita, Akira Tanaka, Mituya Maruyama, Satoshi Konno

JOURNAL OF HYPERTENSION　24　310-310　2006/12

ISSN： 0263-6352
統合医療における医工学の役割自律神経活動の解析を中心とした医工学的評価方法の開発 (日本統合医療学会誌)

仁田新一, 金野敏, 川田浩, 山家智之, 関隆志, 荒井啓行, 杉田典大, 吉澤誠

日本統合医療学会誌　3　(1)　31-37　2006/08
Publisher: 日本統合医療学会
3 From Estimation of Cardiac Function toward Prediction of Emotional State("State of the Art" Biomedical Technology Developed in Japan Will Inspire Intricate Applications in Cardiology in the 21st Century,Roundtable Discussion 7 (RT7) (I),The 70th Anniversary Annual Scientific Meeting of the Japanese Circulation Society)

Yoshizawa Makoto, Tanaka Akira, Sugita Norihiro, Yambe Tomoyuki, Nitta Shin-ichi, Chiba Shigeru

Circulation journal : official journal of the Japanese Circulation Society　70　90-90　2006/03/01
Publisher: Japanese Circulation Society
ISSN： 1346-9843
Quantitative evaluation of effects of visual stimulation based on cardiovascular parameters

Norihiro Sugita, Makoto Yoshizawa, Makoto Abe, Akira Tanaka, Ken-Ichi Abe, Shigeru Chiba, Tomoyuki Yambe, Shin-Ichi Nitta

FUTURE MEDICAL ENGINEERING BASED ON BIONANOTECHNOLOGY, PROCEEDINGS　1035-+　2006
Method to evaluate the physiological effects of visual stimulation using finger photoplethysmography

Makoto Abe, Makoto Yoshizawa, Norihiro Sugita, Akira Tanaka, Shigeru Chiba, Tomoyuki Yambe, Shin-Ichi Nitta

FUTURE MEDICAL ENGINEERING BASED ON BIONANOTECHNOLOGY, PROCEEDINGS　893-+　2006
生理的パラメータの相互相関を用いた映像の生体影響評価法

吉澤誠, 田中明, 杉田典大, 阿部健一, 山家智之, 仁田新一

BME　18　(1)　8-13　2004

DOI： 10.11239/jsmbe1987.18.8

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Books and Other Publications 14

生体センシング技術開発の現状と研究開発のポイント

杉田典大

情報機構　2024/02

ISBN: 9784865022636
日常人間ドック : 2040年からのヘルスケアメッセージ

吉澤誠, 杉田典大, 富田高弘, 大塚利彦

パレード,星雲社　2023/06

ISBN: 9784434316371
人間情報学 : 快適を科学する

吉澤誠, 杉田典大

近代科学社　2021/12

ISBN: 9784764960299
「非接触」が拓く新しいバイタルモニタリング

吉澤誠, 杉田典大

シーエムシー出版　2021/05

ISBN: 9784781316062
テレワーク社会を支えるリモートセンシング

杉田典大, 吉澤誠

シーエムシー出版　2021/04

ISBN: 9784781316024
IoHを指向する感情・思考センシング技術

吉澤誠, 杉田典大

シーエムシー出版　2019/08

ISBN: 9784781314303
ＶＲ／ＡＲ技術の開発動向と最新応用事例

杉田典大

技術情報協会　2018/02

ISBN: 9784861046940
生体情報センシングとヘルスケアへの最新応用

杉田典大

技術情報協会　2017/06

ISBN: 9784861046612
Assessment of motor finction in hemiplegic patients using a virtual cycling wheel chair

Remi Ishikawa, Norihiro Sugita, Makoto Abe, Makoto Yoshizawa, Kazunori Seki, Yasunobu Handa

Nova Science Publishers　2016/01

ISBN: 9781634840279
A respiratory motion prediction based on time-variant seasonal autoregressive model for real-time image-guided radiotherapy

Kei Ichiji, Noriyasu Homma, Masao Sakai, Makoto Abe, Norihiro Sugita, Makoto Yoshizawa

In-TechOpen　2013/07
Methods for Estimating a Cross-Correlation Index of the Baroreflex System by Using a Plethysmogram

Makoto Yoshizawa, Norihiro Sugita, Tomoyuki Yambe, Satoshi Konno, Telma Keiko Sugai, Makoto Abe, Noriyasu Homma, Shin-ichi Nitta

Imperial College Press　2012/02

ISBN: 9781848169050
Relationship between Physiological Indices and a Subjective Score in Evaluating Visually Induced Motion Sickness

Norihiro Sugita, Makoto Yoshizawa, Akira Tanaka, Makoto Abe, Shigeru Chiba, Tomoyuki Yambe, Shin-ichi Nitta

Springer　2009/07
Quantitative Evaluation of Effects of Visually Induced Motion Sickness Using Photoplethysmography

Makoto Abe, Makoto Yoshizawa, Norihiro Sugita, Akira Tanaka, Shigeru Chiba, Tomoyuki Yambe, Shin-ichi Nitta

Imperial College Press　2009/02
Independent Component Analysis of Finger Photoplethysmography for Evaluating Effects of Visually-Induced Motion Sickness

Makoto Abe, Makoto Yoshizawa, Norihiro Sugita, Akira Tanaka, Shigeru Chiba, Tomoyuki Yambe, Shin-ichi Nitta

Springer　2007

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Presentations 38

自動運転車における映像脈波に基づく乗り物酔いの評価

吉澤誠, 杉田典大, 湯田恵美, 山家智之, 八巻俊輔, 田中明, 山邉茂之, 細貝祐司, 山科瞬

日本生体医工学会大会プログラム・抄録集(Web)　2024
健康社会実現のためのサイバーフィジカルシステム Invited

杉田典大

東北大学電気・情報産学官フォーラム2022　2022/10
Objective Evaluation of Habituation using Psychomotor Vigilance Task-Comparison of Younger and older for Self-Driving-

湯田恵美, 吉田豊, 高橋信, 杉田典大, 吉澤誠

2022
生体信号処理を用いたCOVID-19罹患推定技術の現状と課題

湯田恵美, 杉田典大, 吉澤誠

生体医工学　2022
触れずに測る映像脈波の活用 Invited

杉田典大, 吉澤誠

日本光学会年次学術講演会　2021/10/29
触れずに測る生体信号 Invited

杉田典大, 吉澤誠

電子通信情報学会ヒューマン情報処理研究会　2021/02/19
近赤外映像による脈波情報推定

杉田典大, 吉澤誠

第59回日本生体医工学会大会　2020/05/26
Possibilities and Limitations of Video Plethysmography as Wear“less”-Monitoring

吉澤誠, 杉田典大, 湯田恵美, 田中明, 本間経康, 山家智之

2020
映像脈波を用いた血圧推定の可能性 Invited

杉田典大, 吉澤誠, 野呂泰平, 八巻俊輔, 市地慶, 本間経康, 山家智之

第58回日本生体医工学会大会　2019/06
深層学習は乳癌画像をどう読むか

本間経康, 本間経康, 張暁勇, 張暁勇, 高野寛己, 野呂恭平, 張彰, 陳家旗, 市地慶, 市地慶, 杉田典大, 酒井正夫, 吉澤誠, 川住祐介, 石橋忠司

2019/01/15
掌映像からの血圧情報推定に関する研究

野呂泰平, 松嵜朋也, 吉澤誠, 杉田典大, 八巻俊輔, 市地慶

生体医工学　2019

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近年，ビデオカメラからの映像を用いて非接触で生体情報を取得する研究が盛んに行われている．ヘモグロビンの吸光度が緑色の波長帯域で高いという原理に基づいて，身体映像中の緑色輝度値の変化から脈波（映像脈波と呼ぶ）を計測することができる．本研究では映像脈波を用いて，血圧の絶対値を推定する手法を提案する．映像脈波は血管内の血液量変化を反映するため，血管の断面積と相関していると考えられる．そこで血管内圧と断面積の関係式を用いて，心臓からの高さが異なる2ヶ所で計測した映像脈波の振幅値の比から血管内圧を推定する式を導出した．健常な5名の被験者を対象として，安静とぺダリング運動を交互に行い血圧を変化させる実験を行った．実験の結果，実際の血圧値と推定値の相関係数は平均で0.64，推定値誤差は平均で42.7 mmHgであったが，最も良い被験者では相関係数0.89，推定値誤差は7.15 mmHgであった．誤差の原因としては，提案式に含まれる定数項の値が被験者毎に異なっているためであると考えられることから，今後，この定数値を安定的に求める方法の確立が必要である．
マルチカメラ映像を用いた生体情報抽出に関する研究

戸沼大, 吉澤誠, 杉田典大, 本間経康

計測自動制御学会システム・情報部門学術講演会講演論文集　2019
Hidden Markov model-based extraction of tumor target in X-ray image sequence for markerless tumor tracking

新藤雅大, 市地慶, 本間経康, 張曉勇, 杉田典大, 八巻俊輔, 髙井良尋, 吉澤誠

2018/09
死人の脈を診る「魔法の鏡」―ビデオカメラによる遠隔・非接触生体情報抽出技術―

吉澤誠, 杉田典大, 田中明, 本間経康, 山家智之

光学シンポジウム講演予稿集　2018/06/21
Contact-less method for monitoring blood pressure changes using video plethysmography Invited

Sugita Norihiro, Yoshizawa Makoto, Abe Makoto, Tanaka Akira, Homma Noriyasu, Yambe Tomoyuki

2018/06
関心領域の画素数が映像からの心拍数推定精度に及ぼす影響に関する研究

戸沼大, 吉澤誠, 杉田典大, 本間経康

計測自動制御学会システム・情報部門学術講演会講演論文集(CD-ROM)　2018
Possibility of Games Using a Blood Perfusion Display: "The Mirror Magical"

2017/09/09
映像脈波によるサイバー健康管理

吉澤誠, 杉田典大, 阿部誠, 田中明, 本間経康, 山家智之

日本生体医工学会大会プログラム・抄録集(Web)　2017
ビデオカメラによる遠隔・非接触的血圧変動推定

吉澤誠, 杉田典大, 阿部誠, 田中明, 本間経康, 山家智之

日本生体医工学会大会プログラム・抄録集(Web)　2017
Estimation of autonomic nervous activity using green light photoplethysmogram

IEICE technical report　2016/09/24
A study on blood viscosity estimation using pulse wave signal

Tomohisa Yoshida, Norihiro Sugita, Makoto Abe, Makoto Yoshizawa, Hidekazu Miura, Yasuyuki Shiraishi, Tomoyuki Yammbe

Transactions of Japanese Society for Medical and Biological Engineering　2014/08/17

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Increased blood viscosity is closely associated with the risk of cardiovascular and lifestyle-related diseases such as diabetes. Conventional methods of measuring blood viscosity are not suitable for home use. In the present study, we suggested a new estimation method of blood viscosity using photoplethysmography. As an indicator of blood viscosity, we focused on the damping coefficient of a physical model that simulates the movement of a blood vessel. We calculated the damping coefficients from the blood pressure waveforms of a goat with reducing hemoglobin concentrations in the blood. The results suggested that the damping coefficient was correlated with the hemoglobin concentration, which in turn is correlated with the blood viscosity. Thus, the proposed method could possibility be used to measure blood viscosity.
Tele-healthcare systems for end-of-life decision at home

Makoto Yoshizawa, Hitoshi Ohuchi, Kenji Nunokawa, Kouichi Taniuchi, Norihiro Sugita, Makoto Abe, Noriyasu Homma, Tomoyuki Yambe

Transactions of Japanese Society for Medical and Biological Engineering　2014/08/17

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Super aging society such as Japan would need tele-healthcare systems for home medical care to suppress medical cost inflation. In this situation, we have developed a tele-healthcare system for end-of-life decision at home using a wireless electrocardiograph combined with a smartphone and a sphygmogram signal extracted from an ordinary video camera. The experimental results have indicated that long term monitoring through the smartphone and a server will provide rich information on the patient's terminal status for doctors in remote locations. However, it is necessary to collect many clinical data to predict the timing of end-of-life more precisely.
Development of motor function assessment system with cycling wheelchair for hemiplegic patient

Remi Ishikawa, Norihiro Sugita, Makoto Abe, Makoto Yoshizawa, Kazunori Seki, Yasunobu Handa

Transactions of Japanese Society for Medical and Biological Engineering　2014/08/17

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A cycling wheelchair (CWC) has been focused as a new rehabilitation tool for hemiplegic patients. These individuals can drive a CWC by rotating the pedals with their non-paralyzed feet. In previous studies, our group has developed a system that allows patients to safely practice driving a CWC in a virtual environment. To confirm the efficacy of rehabilitation with the system, changes in the motor performance of patients driving the CWC should be analyzed. Leg torques of patients rotating the CWC pedals are useful information to evaluate their motor performances. In this study, a new method to estimate the torque of each leg separately was proposed. The proposed method estimated the angle of CWC pedals using the Kalman filter and, the influence of the weight of users' legs is eliminated based on a human joint model. The accuracy of the proposed method was tested based on an experiment.
Effect of Repetitive Viewing of the Same Video Picture on the Biological Assessment of Three-Dimensional Scenography

2012/09/12
スマートフォンと仮想プローブを用いた遠隔超音波画像アーカイビングシステム

2012/05
視聴空間内の温度の違いが映像酔いに与える影響

2009/09/24
時間的推移から見た生理評価値と主観評価値の関連性

第23回生体・生理工学シンポジウム　2008/09/28
動脈と心臓の血圧反射機能の感受性を同時に定量的に計測できる新しい診断装置の発明

山家智之, 吉澤誠, 杉田典大

日本動脈硬化学会総会プログラム・抄録集　2007/06
心拍-血圧変動間の因果コヒーレンス関数による鍼効果の評価

第46回日本生体医工学会大会　2007/04/25
不快映像および手ぶれ映像視聴時における血圧-心拍数間の最大相互相関係数の変化

第19回生体・生理工学シンポジウム　2004/11/01
血圧-心拍数間の相互相関係数および因果的コヒーレンス関数を用いた映像刺激の生体影響評価

第42回日本エム・イー学会大会　2004/05/19
映像刺激を介した血圧ー心拍数間の最大相互相関係数と瞬時位相差のバイオフィードバック

第18回生体・生理工学シンポジウム　2003/10/06
Assessing a Simplified Analyzer of Physiological Indices for Reflecting Physiological and Psychological States in Virtual Spaces

YOSHIZAWA Makoto, SUGITA Norihiro, TANAKA Akira, MASUDA Tatsuya, ABE Ken-ichi, YAMBE Tomoyuki, NITTA Shin-ichi

Proceedings of the Virtual Reality Society of Japan annual conference　2003/09/17
情動反応を反映する生理的指標の音響・映像を用いたフィードバック制御

ヒューマンインタフェースシンポジウム2002　2002/09/01
血圧－心拍数間の相互相関係数を用いた映像刺激の影響評価

ヒューマンインタフェースシンポジウム2001　2001/10/03
乗り物酔いしやすさと3次元映像感受性の関連性の定量的評価

日本バーチャルリアリティ学会第6回大会　2001/09/19
血圧-心拍数間の相互相関に基づく3次元映像の評価

日本バーチャルリアリティ学会第5回大会　2000/09/18
3次元映像が生理的指標に及ぼす影響

吉澤誠, 杉田典大, 木林知子

日本バーチャルリアリティ学会第4回大会　1999/09/29

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Industrial Property Rights 26

BIOLOGICAL INFORMATION MEASUREMENT DEVICE, RECORDING MEDIUM

Makoto Yoshizawa, Norihiro Sugita

ZL 201880076250.X

Property Type: Patent
画像処理装置,画像処理方法および画像処理プログラム

本間経康, 市地慶, 新藤雅大, 杉田典大, 吉澤誠, 高井良尋

特許第7273416号

Property Type: Patent
トレーニング装置

半田康延, 関和則, 吉澤誠, 杉田典大

特許第7236086号

Property Type: Patent
BIOLOGICAL INFORMATION MEASURING APPARATUS AND BIOLOGICAL INFORMATION MEASURING METHOD, AND COMPUTER PROGRAM PRODUCT

Makoto Yoshizawa, Norihiro Sugita, Makoto Abe, Tomoyuki Yambe, Noriyasu Homma, Kazuma Obara, Akira Tanaka, Yuki Horihata

US 11,445,921 B2

Property Type: Patent
血圧推定装置、血圧推定方法及び血圧推定プログラム

吉澤誠, 杉田典大, 野呂泰平, 池宮大稀

特許第7034524号

Property Type: Patent
生体情報計測装置、生体情報計測プログラム、及び生体情報計測方法

吉澤誠, 杉田典大

特許第6620999号

Property Type: Patent
生体情報表示装置、生体情報表示方法、及び生体情報表示プログラム

吉澤誠, 杉田典大, 阿部誠, 山家智之, 本間経康, 小原一誠, 田中明, 堀畑友希

特許第6727599号

Property Type: Patent
生体情報計測装置、生体情報計測方法、生体情報表示装置及び生体情報表示方法

吉澤誠, 杉田典大, 阿部誠, 山家智之, 本間経康, 小原一誠, 田中明, 堀畑友希

特許第6683367号

Property Type: Patent
脈波伝播速度の測定方法、その測定方法を用いた測定システムの作動方法及び脈波伝播速度の測定システム並びに撮像装置

高森哲弥, 吉澤誠, 本間経康, 杉田典大, 阿部誠, 田中明

特許第6072893号

Property Type: Patent
自律神経機能測定装置

狩野佑介, 吉澤誠, 山家智之, 杉田典大

特許第5408751号

Property Type: Patent
呼吸指示プログラム、呼吸指示装置、呼吸指示システム、および呼吸指示処理方法

古田律克, 吉澤誠, 杉田典大, 山家智之

特許第5578518号

Property Type: Patent
ゲームプログラム、ゲーム装置、ゲームシステム、およびゲーム処理方法

阿部悟郎, 中山忠雄, 吉澤誠, 杉田典大, 山家智之

特許第5737667号

Property Type: Patent
生体情報処理プログラム、生体情報処理装置、生体情報処理方法および生体情報処理システム

吉澤誠, 杉田典大, 山家智之, 阿部誠

特許第5578515号

Property Type: Patent
ゲームプログラム、ゲーム装置、ゲームシステム、およびゲーム処理方法

阿部悟郎, 川邊智惠, 吉澤誠, 杉田典大, 山家智之

特許第5656160号

Property Type: Patent
情報処理プログラム，情報処理装置，情報処理方法および情報処理システム

古田律克, 吉澤誠, 杉田典大, 山家智之

特許第5804405号

Property Type: Patent
ゲームプログラム、ゲーム装置、制御方法、およびゲームシステム

古田律克, 阿部悟郎, 吉澤誠, 杉田典大, 山家智之

特許第5721067号

Property Type: Patent
情報処理プログラムおよび情報処理装置

古田律克, 吉澤誠, 山家智之, 杉田典大

特許第4936479号

Property Type: Patent
生体状況評価装置および生体評価信号算出方法

吉澤誠, 阿部誠, 杉田典大, バウ・ケンジ, 山中篤

特許第5161671号

Property Type: Patent
空調装置

二ツ山幸樹, 難波晋治, 中川剛, 吉澤誠, 杉田典大, 中村信志

特許第4968023号

Property Type: Patent
血圧反射機能測定装置

山家智之, 丸山満也, 川田浩, 吉澤誠, 田中明, 杉田典大, 金野敏, 仁田新一, 西條芳文, 宗像正徳

特許第4789203号

Property Type: Patent
IMAGE PROCESSING DEVICE, IMAGE PROCESSING METHOD, AND NON-TRANSITORY COMPUTER-READABLE RECORDING MEDIUM HAVING STORED THEREIN IMAGE PROCESSING PROGRAM

Noriyasu Homma, Masao Sakai, Kei Ichiji, Naoki Shibusawa, Xiaoyong Zhang, Makoto Abe, Norihiro Sugita, Makoto Yoshizawa, Yoshihiro Takai

US 10,504,225 B2

Property Type: Patent
STORAGE MEDIUM HAVING STORED THEREON INFORMATION PROCESSING PROGRAM, AND INFORMATION PROCESSING DEVICE

Makoto Yoshizawa, Tomoyuki Yambe, Norihiro Sugita, Norikatsu Furuta

US 10,709,978 B2

Property Type: Patent
画像処理装置、画像処理方法、及び、画像処理プログラム

本間経康, 酒井正夫, 市地慶, 澁澤直樹, 張曉勇, 阿部誠, 杉田典大, 吉澤誠, 髙井良尋

特許第6524497号

Property Type: Patent
STORAGE MEDIUM HAVING GAME PROGRAM STORED THEREIN, GAME APPRATUS, GAME SYSTEM, AND GAME PROGRAMING METHOD

Goro Abe, Tomoyuki Yambe, Norihiro Sugita, Makoto Yoshizawa, Tadao Nakayama

US 8,678,935 B2

Property Type: Patent
STORAGE MEDIUM HAVING GAME PROGRAM STORED THEREON, GAME APPARATUS, GAME SYSTEM, AND GAME PROCESSING METHOD

Goro Abe, Makoto Yoshizawa, Norihiro Sugita, Tomoyuki Yambe, Chie Kawabe

US 9,604,141 B2

Property Type: Patent
STORAGE MEDIUM HAVING STORED THEREON INFORMATION PROCESSING PROGRAM, AND INFORMATION PROCESSING DEVICE

Makoto Yoshizawa, Tomoyuki Yambe, Norihiro Sugita, Norikatsu Furuta

US 9,623,330 B2

Property Type: Patent

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Research Projects 11

イメージプレチスモグラムによる血管状態推定を用いた動脈紋認証に関する基礎的研究

杉田典大, 八巻俊輔, 湯田恵美, 市地慶

Offer Organization: 日本学術振興会

System: 科学研究費助成事業

Category: 基盤研究(B)

Institution: 東北大学

2021/04/01 - 2025/03/31

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本研究では，映像から得られる脈動情報であるイメージプレチスモグラム(IPG)の生成パターンが皮下の動脈走行状態によって決まるという仮説のもと，身体の各部位でみられるIPG生成パターンに基づいて個人認証を行う「動脈紋」認証の手法を確立することを目指している．本研究課題では，この「動脈紋」抽出に関する基礎的技術を確立すると共に，その認証精度について検証を行う．従来の生体認証が主に静止画像から捉えられる身体的特徴を用いるのに対し，本提案手法では経時的変化を伴うIPGの生成パターンから得られる身体的特徴を用いており，偽造が極めて困難であると考えられる．初年度にあたる今年度は，先行研究で報告されている，手掌部において得られるIPGで生じる特異的な脈動領域である「ホットスポット」の存在を確認するため，白色光と近赤外光を照射光として用いた際の手掌部マルチスペクトル画像から緑色光画素と近赤外光画素によるIPGデータをそれぞれ取得し，これに周波数スペクトル解析を行って脈動成分を抽出した後，手掌領域内における脈動強度の空間分布を計算した．3人の被験者に対して分析を行った結果，先行研究と同様に，脈動が強く現れる箇所とそうでない箇所が存在し，特に緑色光画素における脈動強度分布において個人毎に異なるパターンが生じることを確認した．次に，このIPG脈動強度分布パターンに認証として活用できる情報が含まれているか否かを調査するため，生体認証の基本要件である「普遍性」に着目して検証実験を実施した．実験では，複数の被験者から日付や時間帯を変えた場合のIPGを取得し，前述の脈動強度分布を求めた．その結果，測定回によらず，同一被験者の脈動強度分布では特に強い相関がみられることが確認された.
イメージプレチスモグラムによる血管状態推定を用いた動脈紋認証に関する基礎的研究

杉田典大, 八巻俊輔, 湯田恵美, 市地慶

Offer Organization: 日本学術振興会

System: 科学研究費助成事業

Category: 基盤研究(B)

Institution: 東北大学

2021/04/01 - 2025/03/31

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本研究では，映像から得られる脈動情報であるイメージプレチスモグラム(IPG)の生成パターンが皮下の動脈走行状態によって決まるという仮説のもと，身体の各部位でみられるIPG生成パターンに基づいて個人認証を行う「動脈紋」認証の手法を確立することを目指している．本研究課題では，この「動脈紋」抽出に関する基礎的技術を確立すると共に，その認証精度について検証を行う．従来の生体認証が主に静止画像から捉えられる身体的特徴を用いるのに対し，本提案手法では経時的変化を伴うIPGの生成パターンから得られる身体的特徴を用いており，偽造が極めて困難であると考えられる．初年度にあたる今年度は，先行研究で報告されている，手掌部において得られるIPGで生じる特異的な脈動領域である「ホットスポット」の存在を確認するため，白色光と近赤外光を照射光として用いた際の手掌部マルチスペクトル画像から緑色光画素と近赤外光画素によるIPGデータをそれぞれ取得し，これに周波数スペクトル解析を行って脈動成分を抽出した後，手掌領域内における脈動強度の空間分布を計算した．3人の被験者に対して分析を行った結果，先行研究と同様に，脈動が強く現れる箇所とそうでない箇所が存在し，特に緑色光画素における脈動強度分布において個人毎に異なるパターンが生じることを確認した．次に，このIPG脈動強度分布パターンに認証として活用できる情報が含まれているか否かを調査するため，生体認証の基本要件である「普遍性」に着目して検証実験を実施した．実験では，複数の被験者から日付や時間帯を変えた場合のIPGを取得し，前述の脈動強度分布を求めた．その結果，測定回によらず，同一被験者の脈動強度分布では特に強い相関がみられることが確認された.
Inconvenient truth of autonomous driving--Automatic detection and prevention of driver's motion sickness

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (B)

Institution: Tohoku University

2020/04/01 - 2024/03/31
Research on the structure of a cycling wheelchair to induce efficient nerve reflexes

SUGITA Norihiro, YOSHIZAWA makoto, HANDA yasunobu, SEKI kazunori

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (C)

Institution: Tohoku University

2016/04/01 - 2019/03/31

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A cycling wheelchair is a rehabilitation tool for hemiplegic patients and elderly people. It aids in the movement of patients with partial paralysis or weakened lower limb muscles through the use of rotating pedals. In this study, we aimed to clarify the structure of a cycling wheelchair that can be driven with a minimum force and is not a physical burden for users. To achieve this, new evaluation methods based on joint torque, exercise efficiency, and mechanical impedance at the musculoskeletal level were developed.
effects of sacral surface electrical stimulation on locomotive activities in human

Handa Yasunobu, MITSUHASHI Kousei, HUTAMI Ryoukou, YOSHIZAWA Makoto, SUGITA Norihiro

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (B)

Institution: Tohoku University

2015/04/01 - 2018/03/31

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We investigated the propulsive effect on walking and walking wheelchair (C - WC) drive by sacral surface electrical stimulation (SES). As a result, the maximum locomotion speed increased significantly in both healthy and walking disabled people. Here, muscle discharge of hamstring muscle and gastrocnemius muscle increased, and in C - WC driving, an increase in torque of hip joint extension and knee joint flexion was recognized, and it was considered to contribute to the promotion effect of SES. When SES was given to stroke hemiplegics during C - WC driving, the unevenness of the depression acceleration of both lower limbs was immediately equalized. This indicates that contraction process of the paralyzed limb muscles approaches normal. From the above results, it was considered that SES caused neuromodulation effect on the central nervous system networks related to locomotion by its afferent neural activities.
Risk Determination of Artificial Stereoscopic Vision Based on Searching for Onset Condition of 3D Sickness

Yoshizawa Makoto, HOMMA Noriyasu, SUGITA Norihiro, YAMBE Tomoyuki, TANAKA Akira

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (B)

Institution: Tohoku University

2012/04/01 - 2016/03/31

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Three dimensional visualization in movies, televisions and video games has been advancing rapidly. However, physiological and psychological effects of artificial stereoscopic vision on humans have not sufficiently been clarified. This study aimed at elucidation of the onset condition of so-called 3D sickness which is caused by artificial stereoscopic vision and the relationship between 3D sickness and visual fatigues. The experimental results have shown the followings: 1) Physiological indices for evaluation of 3D sickness may include psychological disturbance but it can be suppressed by adaptation. 2) It is possible that the cause of visual fatigue in stereoscopic vision can be explained using the contradiction between convergence and accommodation mechanisms. 3) Vertical disparity caused by the tilt of the head should be less than about 0.6 degree to avoid 3D sickness.
Non-contact measurement of blood pressure variability using video images

Sugita Norihiro

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Young Scientists (B)

Institution: Tohoku University

2013/04/01 - 2015/03/31

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It is important to know about a sudden blood pressure change that occurs in everyday life and may pose a danger to human health. In this study, a new non-contact method to measure blood pressure variability is proposed. As an index related to blood pressure variability, the time delay is calculated between two pulse waves obtained from different parts of a subject’s face or hand captured by a video camera. This index is considered to have a negative correlation with blood pressure variability because it approximates the pulse transit time obtained from a photoplethysmograph. The proposed index was calculated from video images of 20 healthy subjects performing the Valsalva maneuver. The results showed that the correlation coefficient between blood pressure and the proposed index was approximately 0.65.
Verification of role-sharing hypothesis of circulatory control and its application to health monitoring using sensors for video games

YOSHIZAWA Makoto, HOMMA Noriyasu, SUGITA Norihiro, YAMBE Tomoyuki, TANAKA Akira

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Challenging Exploratory Research

Institution: Tohoku University

2012/04/01 - 2015/03/31

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This study aimed at developing an estimation system of the baroreflex function, which can be used in daily life using the photoplethysmogram based on dynamics between blood pressure and heart rate. First, it was revealed that two indices, i.e., CVRR defined as the standard deviation of heart rate normalized by its mean value and μPA defined as the natural logarithm of the ratio of low frequency components to high frequency components of the pulse wave amplitude, have high discrimination ability and high reproducibility. Secondly, it was shown that a subject’s age can be estimated with these two indices with the correlation coefficient of 0.774. Finally, it was suggested that the baroreflex function can be estimated by processing the video images of a human body taken with an ordinary video camera.
The evaluation method for the effect of the various unnatural video components on viewers using physiological indices.

TANAKA Akira, YOSHIZAWA Makoto, SUGITA Norihiro, YAMBE Tomoyuki

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (C)

Institution: Fukushima University

2011 - 2013

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The aim of this study was to develop the evaluation method for the effect of the various unnatural video components such as excessive motion on viewers. In order to achieve this object, a new physiological index of autonomic nerve activity relating to vascular regulation was proposed. The model which represents the relationship between video motion and a degree of discomfort was also proposed using non-linear Hammerstein model, in which the discomfort level was estimated by using a multiple regression model whose explanatory variables ware several physiological indices including the proposed vascular index. The model could explain the change in a degree of discomfort with a correlation coefficient of 0.74. It seems that these results can contribute to an objective assessment of visual image safety.
Estimating system for a vascu I ar property based on pu I se wave responses to cuff pressure

SUGITA Norihiro

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Young Scientists (B)

Institution: Tohoku University

2009 - 2010

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The purpose of this study is development of estimating system for a vascular property with high accuracy. To fulfill this purpose, a system that can change pressure in the blood vessel in desired patterns was developed. In addition, a new algorithm to detect arrival times of pulse waves at a sensor was also developed. An experiment using the developed system showed that there is a possibility to decrease intraindividual variability in the vascular property estimation by controlling pressure in the blood vessel according to blood pressure measured in the other side of the body. And the proposed algorithm was relatively robust to noise included in pulse waves.
バーチャル・サイクリングチェアを用いた高次脳機能障害検査システムの開発

吉澤誠, 半田康延, 関和則, 田中明, 杉田典大

Offer Organization: 日本学術振興会

System: 科学研究費助成事業

Category: 萌芽研究

Institution: 東北大学

2006 - 2007

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足で漕ぐ方式の新しい車椅子であるサイクリングチェアは,片麻痺患者を対象とする場合,健常側の片足による駆動にも関わらず,手漕ぎ式車椅子に比較してその走行能力が格段に向上することが明らかとなっている.また,脳機能障害者で介助者なしでは自立歩行ができない患者であっても,安全な環境においてサイクリングチェアの訓練を続けることができれば,少なくともサイクリングチェアによる自立移動ができるようになる可能性がある. そこで本研究では,仮想空間内を走行するサイクリングチェア(バーチャル・サイクリングチェア)を構築し,脳卒中等による脳損傷を原因とする高次脳機能障害の代表的な症状である半側空間無視・地誌的障害(場所の認識の障害)などの定量的な検査ができるようにするとともに,サイクリングチェアの運転訓練によるリハビリを行うことにより,運転技能・筋力・体力の向上を目指すとともに,リハビリの効果を定量化できるようにすることを目的とした. 本年度では,昨年度製作したバーチャル・サイクリングチェア・システムにおいて,地誌的障害検査用仮想空間を構成した.そこで,事前に目標地点を表示した地図を提示した後に目標地点まで到達する課題と,地図を提示することなしにランドマークのみを記憶することで目標地点に到達する課題を作り,そのときの到達時間・経路錯誤回数・移動距離等を指標にして地誌的障害の程度を評価するシステムを構成した.健常者を対象とした実験の結果,本システムの基本的有効性が確かめられた.

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Social Activities 16

たのしいサイエンス・サマースクール

2013 - Present
みやぎ元気まつり2024

2024/08/03 - 2024/08/04
中学生のためのCG講座

2003 - 2019

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主に中学生を対象にして，CGのしくみについての講義を行い，実際にCGを用いたゲーム作りなどの体験を行う．
SICE Week 2012 ロボットと計測・制御展

2012/08/18 - 2012/08/19

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「SICE Annual Conference 2012」の併設行事として開催された市民向けイベント「SICE Week」において，研究開発中であるバーチャル足漕ぎ車椅子システムのデモ展示を行った．
模擬講義（青森県立八戸高校）

2022/09/08 -
高大連携講義（神奈川県立相模原高等学校）

2021/10/04 -
進路講演会（岩手県立花巻北高等学校）

2014/06/03 -

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高校生を対象とした模擬授業，または現在の研究の一端を話しながら，学部・学科などの紹介を行う．
第6回元気！健康！フェアinとうほく

2014/04/05 -

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第6回元気！健康！フェアinとうほくにおいて，研究開発中である遠隔医療システムのデモ展示を行った．
高大連携アドバンスト講義（秋田県立湯沢高等学校）

2013/09/11 -

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大学で行われている最新の研究内容などについて，高校生を対象とした講義を行う．
学都「仙台・宮城」サイエンス・デイ 2013

2013/07/21 -

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学都「仙台・宮城」サイエンス・デイ2013において，研究開発中であるバーチャル足こぎ車いすシステムのデモ展示を行った．
第5回元気！健康！フェアinとうほく

2013/04/06 -

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第5回元気！健康！フェアinとうほくにおいて，研究開発中である遠隔医療システムのデモ展示を行った．
夢の扉プラス「奇跡の車イスで足よ動け！」

2012/11/18 -
大学・学問体験講座（福島県立安積黎明高等学校）

2012/11/07 -

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大学で行われている最新の研究内容などについて，高校生を対象とした講義を行う．
学都「仙台・宮城」サイエンス・デイ 2012

2012/07/15 -

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学都「仙台・宮城」サイエンス・デイ2012において，研究開発中であるバーチャル足漕ぎ車椅子システムのデモ展示を行った．
サキどり特別版！驚きの足こぎ車いす

2012/03/19 -
第3回元気！健康！フェアinとうほく

2011/10/01 -

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第3回元気！健康！フェアinとうほくにおいて，研究開発中である遠隔医療システムのデモ展示を行った．

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Other 7

魔法の鏡

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ビデオカメラで撮影した身体映像から2次元の脈波情報を抽出し，これをリアルタイムに解析することにより自律神経機能を表わす生体指標を何のセンサも身に付けず遠隔的かつ非接触に意識することなく計測する方法を開発する．
画期的にコストパーフォマンスの高いホルター心電図システムの開発

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国際標準規格MFERを扱えるホルター心電計専用の解析ソフトを開発し，解析結果をよりタイムリーにネットワークシステムで担当医に提示するシステムを構築する．
アシスト・制動制御付き足こぎ車いす開発研究

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本研究開発では，足こぎ車いすの機能拡張を目指し，ロボット技術を応用した新しい足こぎ車いすを開発することを目標とする．
在宅終末期見守り用小型軽量無線式省電力心電計の開発

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電池交換無しで7日間連続測定できる無線式心電計を開発する．
生体情報センサ

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圧センサから出力される信号に対するディジタル信号処理技術の開発
生体情報を利用した自律神経機能推定に関する研究

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脈波などの生体情報を利用することで，自律神経機能を推定するアルゴリズムを開発する．
先進予防型健康社会創成クラスター構想

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超高齢社会，医療格差の顕在化などの全世界的な課題に対し，日本国内でも特にそれらが顕著な地域である東北地域において，本件への具体的な解決策の提示を図る．

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