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Paper Abstract and Keywords
Presentation 2004-12-10 09:05
estimation and validation of age dependence of electric properties of biological tissue
Hiroki Kodama, Jianqing Wang, Osamu Fujiwara (NIT)
Abstract (in Japanese) (See Japanese page) 
(in English) It is becoming an important issue to make electromagnetic dosimetry in children due to their increasing use of portable telephones proliferating in our daily life. In this paper, we therefore investigated the age dependence of dielectric properties for living biological tissue. Based on Lichtenecker’s exponential law, at first we derived an empirical formula for the complex permittivity of various tissues as a function of the total body water (TBW). We then measured the frequency characteristics of the dielectric properties for forearms of 50 human subjects aged from 1.5 years old to 80 years old. As a result, we found that the measured results exhibited a compound dielectric properties including skin tissue, while they fell within the estimated ones of skin and 2/3 muscle tissues for all the subjects. Moreover, it was found that the age dependence of dielectric properties is small contrary to expectations, and there is no rapid increase in dielectric properties even at 1.5 years old.
Keyword (in Japanese) (See Japanese page) 
(in English) Bio-electromagnetic environment / biological tissue / dielectric properties / Lichtenecker law / total body water (TBW) / / /  
Reference Info. IEICE Tech. Rep., vol. 104, no. 499, EMCJ2004-102, pp. 1-6, Dec. 2004.
Paper # EMCJ2004-102 
Date of Issue 2004-12-03 (EMCJ) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
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Conference Information
Committee EMCJ  
Conference Date 2004-12-09 - 2004-12-10 
Place (in Japanese) (See Japanese page) 
Place (in English) Nagoya Institute of Technology 
Topics (in Japanese) (See Japanese page) 
Topics (in English) EMC Special Lecture by Guest Speakers from Asian Countries, etc. 
Paper Information
Registration To EMCJ 
Conference Code 2004-12-EMCJ 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) estimation and validation of age dependence of electric properties of biological tissue 
Sub Title (in English)  
Keyword(1) Bio-electromagnetic environment  
Keyword(2) biological tissue  
Keyword(3) dielectric properties  
Keyword(4) Lichtenecker law  
Keyword(5) total body water (TBW)  
1st Author's Name Hiroki Kodama  
1st Author's Affiliation Nagoya Institute of Technology (NIT)
2nd Author's Name Jianqing Wang  
2nd Author's Affiliation Nagoya Institute of Technology (NIT)
3rd Author's Name Osamu Fujiwara  
3rd Author's Affiliation Nagoya Institute of Technology (NIT)
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Date Time 2004-12-10 09:05:00 
Presentation Time 25 
Registration for EMCJ 
Paper # IEICE-EMCJ2004-102 
Volume (vol) IEICE-104 
Number (no) no.499 
Page pp.1-6 
#Pages IEICE-6 
Date of Issue IEICE-EMCJ-2004-12-03 

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