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Affiliation Department |
電気・機械工学科 電気電子分野
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Title |
Associate Professor |
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External Link |
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KODERA Sachiko
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Degree
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Doctor (Engineering) ( 2019.03 Nagoya Institute of Technology )
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修士（工学） ( 2006.03 名古屋工業大学 )
Research Areas
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Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Communication and network engineering / Computational electromagnetics, Temperature, Biophysical modeling, Thermoregulation
From School
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Nagoya Institute of Technology Faculty of Engineering Graduated
- 2002.03
From Graduate School
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Nagoya Institute of Technology Graduate School, Division of Engineering Master's Course Completed
- 2006.03
Papers
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SHARM: Segmented Head Anatomical Reference Models Reviewed
E. A. Rashed, M. Al-Shatouri, I. Laakso, S. Kodera, A. Hirata
Biomedical Signal Processing and Control 104 107481 2025.06
Language：English Publishing type：Research paper (scientific journal)
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Recent advances and future perspective in computational bioelectromagnetics for exposure assessments. Reviewed International coauthorship International journal
Yinliang Diao, Wout Joseph, Dragan Poljak, Luca Giaccone, Sachiko Kodera, Ilkka Laakso, Kenichi Yamazaki, Kun Li, Kensuke Sasaki, Emmeric Tanghe, Mario Cvetković, Walid El Hajj, Takashi Hikage, Fatih Kaburcuk, Gernot Schmid, Anna Šušnjara Nejašmić, Thomas Tarnaud, Vitas Anderson, Kenneth R Foster, Theodoros Samaras, Richard A Tell, Soichi Watanabe, Chung-Kwang Chou, Akimasa Hirata
Bioelectromagnetics 46 ( 3 ) e70002 2025.04
Language：English Publishing type：Research paper (scientific journal)
In the last few decades, extensive efforts have been dedicated to developing computational methods for modeling the interaction of the human body with electromagnetic fields (EMFs). These studies are crucial for the establishment of exposure limits in international standards and guidelines for human protection from EMF, as well as for advancing personalized dosimetry assessment for medical applications using EMF. To summarize the state-of-the-art knowledge in this field, the IEEE International Committee on Electromagnetic Safety (ICES) held an International Workshop on Computational Bioelectromagnetics in February 2024. This review summarizes the technical presentations and discussions from the workshop and was contributed by multiple authors, encompassing topics such as the tissue dielectric property measurement, low-frequency and radio-frequency bioelectromagnetic modeling methods, stochastic modeling in electromagnetic-thermal dosimetry, intercomparison studies, and computational uncertainties. The insights gained from this workshop will guide future research and aid in the development of more accurate and reliable exposure assessment methods.
DOI： 10.1002/bem.70002
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Power absorption and temperature rise in deep learning based head models for local radiofrequency exposures Reviewed International coauthorship International journal
Sachiko Kodera, Reina Yoshida, Essam A Rashed, Yinliang Diao, Hiroyuki Takizawa, Akimasa Hirata
Physics in medicine & biology 2025.02
Authorship：Lead author, Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：IOP publishing
Abstract
Objective: Computational uncertainty and variability of power absorption and temperature rise in humans for radiofrequency (RF) exposure is a critical factor in ensuring human protection. This aspect has been emphasized as a priority. However, accurately modeling head tissue composition and assigning tissue dielectric and thermal properties remains a challenging task. This study investigated the impact of segmentation-based versus segmentation-free models for assessing localized RF exposure. 
Approach: Two computational head models were compared: one employing traditional tissue segmentation and the other leveraging deep learning to estimate tissue dielectric and thermal properties directly from magnetic resonance images. The finite-difference time-domain method and the bioheat transfer equation was solved to assess temperature rise for local exposure. Inter-subject variability and dosimetric uncertainties were analyzed across multiple frequencies.
Main Results: The comparison between the two methods for head modeling demonstrated strong consistency, with differences in peak temperature rise of 7.6±6.4%. The segmentation-free model showed reduced inter-subject variability, particularly at higher frequencies where superficial heating dominates. The maximum relative standard deviation in the inter-subject variability of heating factor was 15.0% at 3 GHz and decreased with increasing frequencies.
Significance: This study highlights the advantages of segmentation-free deep-learning models for RF dosimetry, particularly in reducing inter-subject variability and improving computational efficiency. While the differences between the two models are relatively small compared to overall dosimetric uncertainty, segmentation-free models offer a promising approach for refining individual-specific exposure assessments. These findings contribute to improving the accuracy and consistency of human protection guidelines against RF electromagnetic field exposure.Other Link： https://iopscience.iop.org/article/10.1088/1361-6560/adb935/pdf
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高速高精度脳機能イメージングのための脳波電流源推定精度の数値的評価 Reviewed
新津 正宗，小寺 紗千子，田中 裕士，阪本 卓也，平田 晃正
電子情報通信学会論文誌C 2025.02
Authorship：Corresponding author Language：Japanese Publishing type：Research paper (scientific journal)
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個々人の血流ばらつきを考慮した複合物理解析による知覚温度上昇推定 Invited Reviewed
新井 紀香，湯浅 明子，上原 信太郎，牛澤 一樹，大高 洋平，Chun Ren Phang，後藤 俊幸，平田 晃正，小寺 紗千子
電子情報通信学会論文誌C 2025.01
Authorship：Last author, Corresponding author Language：Japanese Publishing type：Research paper (scientific journal)
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Estimating the perception threshold of electrostimulation and heating for radiofrequency contact current Reviewed
S. Kodera, S. Kimura, S. Uehara, A. Yuasa, K. Ushizawa, Y. Otaka, A. Hirata
IEEE Transactions on Electromagnetic Compatibility Early access 2024.11
Authorship：Lead author, Corresponding author Language：English Publishing type：Research paper (scientific journal)
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Assessment of whole-body-average SAR for exposure to electromagnetic fields up to 30 GHz using body model with scaled dielectric parameters Reviewed International coauthorship
Y. Diao, S. Kodera, K. Li, and A. Hirata
IEEE Transactions on Electromagnetic Compatibility 2024.11
Language：English Publishing type：Research paper (scientific journal)
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Differential impact of SARS-CoV-2 infection during different outbreak periods on incident diabetes in Japan: a matched cohort study utilizing health insurance claims Reviewed
Akiko Matsumoto, Sachiko Kodera, Tatsuya Matsuura, Yoko Takayama, Yuya Yamada, Akimasa Hirata
Environmental Health and Preventive Medicine 2024.10
Language：English Publishing type：Research paper (scientific journal)
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Electric field envelope focality in superficial brain areas with linear alignment montage in temporal interference stimulation Reviewed International coauthorship
A. Hirata, Y. Akazawa, S. Kodera, N. Otsuru, I. Laakso
Computers in Biology and Medicine 178 108697 2024.08
Language：English
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A novel multivariate time series forecasting dendritic neuron model for COVID-19 pandemic transmission tendency Reviewed International coauthorship
C. Tang, Y. Todo, S. Kodera, R. Sun, A. Shimada, and A. Hirata
Neural Networks 179 106527 2024.07
Language：English Publishing type：Research paper (scientific journal)
Books and Other Publications
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感染症流行予測とArtificial Intelligence
平田晃正，小寺紗千子（ Role： Joint author）
医学書院 「臨床検査」 2024.12
Language：jpn Book type：Textbook, survey, introduction
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深層学習(AI)に基づく新型コロナウィルス感染症流行の予測
平田晃正，小寺紗千子，Rashed Essam A.（ Role： Joint author）
臨床と微生物，近代出版 2022.05
Language：jpn Book type：Textbook, survey, introduction
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COVID-19 and Environment - Impact of a Global Pandemic - Reviewed
S. Kodera, E. A. Rashed（ Role： Joint editor）
International Journal of Environmental Research and Public Health 2022
Total pages：280 Language：eng Book type：Scholarly book
Misc
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Evaluation of Electric Field For Perception and Pain Thresholds by TMS
盛山隆聖, 小寺紗千子, 谷恵介, 田中悟志, 平田晃正
電子情報通信学会技術研究報告(Web) 123 ( 370(EST2023 99-121) ) 2024
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Estimation of Heat Stroke Patients in Nagoya City
2020 ( 18 ) 45 - 50 2020.10
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Fundamental Study on Whole Body Average SAR for Millimeter Wave Using the FDTD Method
119 ( 243 ) 33 - 37 2019.10
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5G Communications Systems and Radiofrequency Exposure Limits Invited Reviewed International coauthorship
K. R. Foster, S. Kodera, A. Hirata
3 ( 2 ) 2019.09
Language：English Publishing type：Article, review, commentary, editorial, etc. (scientific journal)
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Temperature Elevation for Brief Exposure in GHz Region (エレクトロニクスシミュレーション)
小寺 紗千子, 平田 晃正
118 ( 249 ) 17 - 21 2018.10
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Modeling of thermoregulatory response of heat adaptation in humans and its application to thermal analysis
118 ( 209 ) 11 - 16 2018.09
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Temperature in the Human Brain for RF Exposure Considering the Vasodilation (エレクトロニクスシミュレーション)
小寺 紗千子, 平田 晃正
118 ( 209 ) 5 - 9 2018.09
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Development of body core temperature computation method with arterial and venous temperatures taken into account
118 ( 144 ) 191 - 196 2018.07
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Variability and Difference of Thermal Time Constants in Human and Rat
117 ( 408 ) 137 - 142 2018.01
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Comparison of Thermal Response between Rat and Human for Exposure from Dipole Antenna
117 ( 245 ) 55 - 59 2017.10
Presentations
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微小末梢神経の皮膚に対する角度による痛覚閾値の変化
柘植陵真・小寺紗千子・平田晃正
電子情報通信学会エレクトロニクスシミュレーション研究会 2024.10 電子情報通信学会
Event date： 2024.10
Language：Japanese Presentation type：Oral presentation (general)
Venue：秋田県 Country：Japan
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4G/5G通信システムを想定した複数電波同時ばく露における生体温度上昇評価
南元佑太、小寺紗千子、井山隆弘、東山潤司、鈴木恭宣、平田晃正
電子情報通信学会エレクトロニクスシミュレーション研究会 2024.10 電子情報通信学会
Event date： 2024.10
Language：Japanese Presentation type：Oral presentation (general)
Venue：秋田県 Country：Japan
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機械学習によるTMSにより刺激された運動野対応部位の高精度推定
田邉拓巳・小寺紗千子・平田晃正
電子情報通信学会エレクトロニクスシミュレーション研究会 2024.10 電子情報通信学会
Event date： 2024.10
Language：Japanese Presentation type：Oral presentation (general)
Venue：秋田県 Country：Japan
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複合物理計算とウェアラブルデバイス技術の融合による熱中症対策 Invited
都甲 浩芳、小寺 紗千子、高河原 和彦
電子情報通信学会ソサイエティ大会 2024.09 電子情報通信学会
Event date： 2024.09
Language：Japanese Presentation type：Oral presentation (invited, special)
Venue：埼玉県 Country：Japan
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磁界ばく露に対する痛覚閾値の周波数特性に関する検討
加藤 輝也、小寺 紗千子、平田 晃正
電子情報通信学会ソサイエティ大会 2024.09 電子情報通信学会
Event date： 2024.09
Language：Japanese Presentation type：Oral presentation (general)
Venue：埼玉県 Country：Japan
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上肢電気刺激における体性感覚誘発電位に対する波源推定
多田 悠希、田中 裕士、小寺 紗千子、和坂 俊昭、平田 晃正
電子情報通信学会ソサイエティ大会 2024.09 電子情報通信学会
Event date： 2024.09
Language：Japanese Presentation type：Oral presentation (general)
Venue：埼玉県 Country：Japan
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脳腫瘍患者TMS刺激による脳機能診断における頭部モデル構築手法の影響
盛山 隆聖、小寺 紗千子、ラシド イサム、田村 学、平田 晃正
電子情報通信学会ソサイエティ大会 2024.09 電子情報通信学会
Event date： 2024.09
Language：Japanese Presentation type：Oral presentation (general)
Venue：埼玉県 Country：Japan
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歩行動作による人体の静電容量特性のばらつき評価
中西 隆一、小寺 紗千子、平田 晃正
電子情報通信学会ソサイエティ大会 2024.09 電子情報通信学会
Event date： 2024.09
Language：Japanese Presentation type：Oral presentation (general)
Venue：埼玉県 Country：Japan
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上肢電気刺激における体性感覚誘発電位に対する波源推定
多田 悠希, 田中 裕士, 小寺 紗千子, 和坂 俊昭, 平田 晃正
電子情報通信学会ソサイエティ大会 2024.09 電子情報通信学会
Event date： 2024.09
Language：Japanese Presentation type：Oral presentation (general)
Venue：埼玉県 Country：Japan
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パッチアレイアンテナを用いた人体背部ばく露装置の開発
加藤将馬，小寺紗千子，平田晃正
電子情報通信学会エレクトロニクスシミュレーション研究会 2024.07 電子情報通信学会
Event date： 2024.07
Language：Japanese Presentation type：Oral presentation (general)
Venue：東京都 Country：Japan
Awards
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電子情報通信学会エレクトロニクスソサイエティ賞
2024.09 電子情報通信学会
都甲 浩芳, 小寺 紗千子, 高河原 和彦
Award type：Honored in official journal of a scientific society, scientific journal Country：Japan
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電子情報通信学会エレクトロニクスソサイエティ賞
2024.09 電子情報通信学会
都甲 浩芳，小寺 紗千子，高河原 和彦
Award type：Honored in official journal of a scientific society, scientific journal Country：Japan
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文部科学大臣賞 科学技術賞 開発部門
2024.04 文部科学省 新規感染症感染者数及び死者数予測システム の開発
平田 晃正，小寺 紗千子，E. A. Rashed
Award type：International academic award (Japan or overseas) Country：Japan
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日本オープンイノベーション大賞 学術会議会長賞
2022.02 内閣府 計算科学に基づく熱中症リスク管理と普及啓発【熱中症ゼロ社会に向けて】
平田晃正，都甲浩芳, 清水将, 堀江祐佳, 小寺紗千子
Award type：International academic award (Japan or overseas) Country：Japan
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文部科学大臣賞 科学技術賞 理解増進部門
2020.04 文部科学省 個人に応じたリスク管理に基づく熱中症予防普及啓発
平田 晃正，山本 祐圭，江川 隆輔，小寺 紗千子，木幡 咲英里
Award type：International academic award (Japan or overseas) Country：Japan
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Prizes for Science and Technology (Public Understanding Promotion Category))
2020.04 Commendation for Science and Technology, Minister of Education, Culture, Sports, Science, and Technology, Japan
A. Hirata, Y. Yamamoto, R. Egawa, S. Kodera, S. Kowata
Scientific Research Funds Acquisition Results
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6GHz超周波数帯における無線システム安全性の適合性評価
Grant number：24K00868 2024.04 - 2027.03
科学研究費補助金 基盤研究(B)
Authorship：Principal investigator Grant type：Competitive
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統計計算科学によるミリ波帯無線システム安全性の国際標準化
Grant number：21K04000 2021.04 - 2024.03
科学研究費補助金 基盤研究(C)
Authorship：Principal investigator Grant type：Competitive
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人体温熱生理応答への微気象の影響解明とモデル化
Grant number：20H05753 2020.04 - 2023.03
科学研究費補助金 学術変革領域研究(B)
Authorship：Coinvestigator(s) Grant type：Competitive
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Effect of Micrometeorology on Human Thermoreguatory Response and its Modeling
Grant number：20H05753 2020.04 - 2023.03
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Transformative Research Areas (B) Grant-in-Aid for Transformative Research Areas (B)
Authorship：Coinvestigator(s) Grant type：Competitive
Grant amount：\14170000 （ Direct Cost: \10900000 、 Indirect Cost：\3270000 ）
Past of Commissioned Research
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複合電波ばく露のヒト皮膚感覚に及ぼす影響評価
2023.07 - 2028.03
総務省 総務省生体電磁環境研究 General Consignment Study
増田宏、松本明子
Authorship：Principal investigator Grant type：Competitive
Committee Memberships
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電子情報通信学会 英文論文誌小特集編集委員会 編集委員
2023.11
Committee type：Academic society
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電子情報通信学会エレクトロニクスシミュレーション研究会 専門委員
2023.05
Committee type：Academic society
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総務省 電波防護指針の在り方に関する検討作業班 構成員
2022.12
Committee type：Government
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International Commission on Non-Ionizing Radiation Protection (ICNIRP) Scientific expert group, Member
2022.11
Committee type：Other
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Frontiers in Environmental Health Review Editor on the Editorial Board of Occupational safety and Health Interventions
2022.08
Committee type：Academic society
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IEEE International Committee on Electromagnetic Safety (ICES) Technical Committee 95, Subcommittee 6, Member
2022.01
Committee type：Academic society
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IEEE ICES Technical Committee 95, Subcommittee 6, Working Group 7 Co-Chair
2022.01
Committee type：Academic society
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Special Issue, Guest Editor
2021.09 - 2022.07
Committee type：Academic society
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文部科学省科学技術・学術政策研究所科学技術予測センター 専門調査員
2018.04
Committee type：Government