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Paper Abstract and Keywords
Presentation 2025-07-10 09:35
Accuracy Improvement of Tensor-Conductance Model for Human Exposure to Low-Frequency Magnetic Field Exposure
Eikei Yamada, Sachiko Kodera, Akimasa Hirata (NITech) EMT2025-8 MW2025-21 OPE2025-11 EST2025-7 MWPTHz2025-21
Abstract (in Japanese) (See Japanese page) 
(in English) In recent years, non-invasive stimulation of brain tissue using electromagnetic fields has attracted attention in the medical field. At the same time, concerns about potential adverse health effects from electromagnetic field exposure have grown, leading international organizations to issue guidelines that use the induced electric field strength inside the body as an evaluation index. Because the induced electric field strength in the body cannot be measured directly, calculations using anatomical human body models are performed. One of the evaluation methods for these calculations is the SPFD method. However, human body models composed of voxels typically employ tissue segmentation, which can result in sharp conductivity changes at tissue interfaces and make them prone to staircasing errors. To reduce these numerical errors, approaches such as introducing a tensor model that uses a mesh and defines edge conductance as a tensor, as well as implementing the SPFD method with a simplified model, have been considered. In this study, we build upon previous research to construct a three-dimensional SPFD method and investigate improvements in speed and accuracy when applying the Multigrid method. Furthermore, using a realistic human head model, we verify the effectiveness of reducing staircasing errors at the cortical surface.
Keyword (in Japanese) (See Japanese page) 
(in English) SPFD method / tensor mode / staircasing errors / / / / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 111, EST2025-7, pp. 1-5, July 2025.
Paper # EST2025-7 
Date of Issue 2025-07-03 (EMT, MW, OPE, EST, MWPTHz) 
ISSN Online edition: ISSN 2432-6380
Copyright
and
reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF EMT2025-8 MW2025-21 OPE2025-11 EST2025-7 MWPTHz2025-21

Conference Information
Committee EMT OPE EST MWPTHz MW IEE-EMT  
Conference Date 2025-07-10 - 2025-07-11 
Place (in Japanese) (See Japanese page) 
Place (in English) Okhotsk JA Bldg. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Workshop on Optical and Microwave technologies 
Paper Information
Registration To EST 
Conference Code 2025-07-EMT-OPE-EST-MWPTHz-MW-EMT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Accuracy Improvement of Tensor-Conductance Model for Human Exposure to Low-Frequency Magnetic Field Exposure 
Sub Title (in English)  
Keyword(1) SPFD method  
Keyword(2) tensor mode  
Keyword(3) staircasing errors  
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1st Author's Name Eikei Yamada  
1st Author's Affiliation Nagoya Institute of Technology (NITech)
2nd Author's Name Sachiko Kodera  
2nd Author's Affiliation Nagoya Institute of Technology (NITech)
3rd Author's Name Akimasa Hirata  
3rd Author's Affiliation Nagoya Institute of Technology (NITech)
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Speaker Author-1 
Date Time 2025-07-10 09:35:00 
Presentation Time 25 minutes 
Registration for EST 
Paper # EMT2025-8, MW2025-21, OPE2025-11, EST2025-7, MWPTHz2025-21 
Volume (vol) vol.125 
Number (no) no.108(EMT), no.109(MW), no.110(OPE), no.111(EST), no.112(MWPTHz) 
Page pp.1-5 
#Pages 5 
Date of Issue 2025-07-03 (EMT, MW, OPE, EST, MWPTHz) 

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