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Paper Abstract and Keywords
Presentation 2016-12-16 11:20
Non-contact Measurement of the Dielectric Properties of Biological Tissues at 100 - 1000 kHz -- Simulation Using an Equivalent Circuit --
Shiro Kawai, Kenji Shiba (TUS) EMCJ2016-101
Abstract (in Japanese) (See Japanese page) 
(in English) The recent development of techniques such as wireless power transfer has led to increasing concerns about adverse effects of electromagnetic fields on the body. To evaluate theses effects, the dielectric properties of biological tissues must be determined. However, typical dielectric properties have a level of uncertainty when measured at frequencies below 1000 kHz because of the polarized capacitor values caused by the contact between the measurement probe or electrodes and the sample. A non-contact measuring method was developed using two transformers and a measuring case which can measure the dielectric properties of biological samples. The voltage ratio of the primary and tertiary coil V1/V3 and phase difference of the primary and tertiary coil θ1-θ3 were measured when the measuring case was filled with the NaCl solution (σ = 0.476 S/m) and used as a secondary coil. First, the voltage ratio and phase difference were measured when the lumped parameter elements, which have accurate values, were used as a secondary coil. Then, the conductivity σ and permittivity εr of the NaCl solution were obtained by comparing V1/V3 and θ1-θ3. As a result, σ = 0.476 S/m, εr = 3227 were obtained. Second, an equivalent circuit with two transformers and a measuring case was designed and calculated. The values σ = 0.476 S/m, εr = 12100 were obtained by comparing the measured results of the NaCl solution and the calculated results. The results indicate that our measurement method has the potential to measure the dielectric properties of biological tissues.
Keyword (in Japanese) (See Japanese page) 
(in English) Biological tissues / Dielectric properties / Non-contact measurement / / / / /  
Reference Info. IEICE Tech. Rep., vol. 116, no. 370, EMCJ2016-101, pp. 13-18, Dec. 2016.
Paper # EMCJ2016-101 
Date of Issue 2016-12-09 (EMCJ) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
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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)
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Conference Information
Committee EMCJ IEE-EMC  
Conference Date 2016-12-16 - 2016-12-16 
Place (in Japanese) (See Japanese page) 
Place (in English) Nagoya Institute of Technology 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Power electronics, Biomedical EMC, EMC 
Paper Information
Registration To EMCJ 
Conference Code 2016-12-EMCJ-EMC 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Non-contact Measurement of the Dielectric Properties of Biological Tissues at 100 - 1000 kHz 
Sub Title (in English) Simulation Using an Equivalent Circuit 
Keyword(1) Biological tissues  
Keyword(2) Dielectric properties  
Keyword(3) Non-contact measurement  
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1st Author's Name Shiro Kawai  
1st Author's Affiliation Tokyo University of Science (TUS)
2nd Author's Name Kenji Shiba  
2nd Author's Affiliation Tokyo University of Science (TUS)
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Speaker Author-1 
Date Time 2016-12-16 11:20:00 
Presentation Time 25 minutes 
Registration for EMCJ 
Paper # EMCJ2016-101 
Volume (vol) vol.116 
Number (no) no.370 
Page pp.13-18 
#Pages 6 
Date of Issue 2016-12-09 (EMCJ) 

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