Variation of the dielectric properties of tissues with age: the effect on the values of SAR in children when exposed to walkie-talkie devices

被引：117

作者：

Peyman, A. ^{[1
]}

Gabriel, C. ^{[2
]}

Grant, E. H. ^{[2
]}

Vermeeren, G. ^{[3
]}

Martens, L. ^{[3
]}

机构：

[1] Hlth Protect Agcy, Phys Dosimetry Dept, Didcot OX11 0RQ, Oxon, England

[2] MCL P, London E18 2EL, England

[3] Ghent Univ IBBT, Fac Engn, Dept Informat Technol, Ghent, Belgium

来源：

PHYSICS IN MEDICINE AND BIOLOGY | 2009年 / 54卷 / 02期

关键词：

PERMITTIVITY VALUES; ELECTROMAGNETIC ABSORPTION; MICROWAVE-FREQUENCIES; ELECTRICAL-PROPERTIES; BIOLOGICAL-SYSTEMS; MOBILE TELEPHONES; 1900; MHZ; ADULTS; BRAIN; BONE;

D O I：

10.1088/0031-9155/54/2/004

中图分类号：

R318 [生物医学工程];

学科分类号：

0831 ;

摘要：

In vitro dielectric properties of ageing porcine tissues were measured in the frequency range of 50 MHz-20 GHz, and the total combined uncertainties of the measurements were assessed. The results show statistically significant reduction with age in both permittivity and conductivity of 10 out of 15 measured tissues. At microwave frequencies, the observed variations are mainly due to the reduction in the water content of tissues as an animal ages. The results obtained were then used to calculate the SAR values in children of age 3 and 7 years when they are exposed to RF induced by walkie-talkie devices. No significant differences between the SAR values for the children of either age or for adults were observed.

引用

页码：227 / 241

页数：15

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