Hirata Akimasa, Kodera Sachiko, Wang Jianqing, Fujiwara Osamu
Computer Science and Engineering, Nagoya Institute of Technology, Nagoya, Japan.
Bioelectromagnetics. 2007 Sep;28(6):484-7. doi: 10.1002/bem.20335.
Electromagnetic (EM) absorption of the human body for far-field exposure at the International Commission on Non-Ionizing Radiation Protection (ICNIRP) reference level has two peaks in the resonance frequency and GHz regions. Dominant factors influencing whole-body average specific absorption rate (SAR) in these two frequency regions have not yet been revealed sufficiently. The main purpose of this study is to clarify the dominant factors influencing EM power absorption in terms of whole-body average SAR in an anatomically based model compared with those in a homogeneous anthropomorphic model and corresponding cuboid models. Computational results show that EM absorption peak in the resonance frequency region greatly depends on the electric properties of tissue, while the peak in the GHz region is affected mainly by the surface area of the model.
在国际非电离辐射防护委员会（ICNIRP）参考水平下，人体对远场暴露的电磁（EM）吸收在共振频率和吉赫兹（GHz）区域有两个峰值。在这两个频率区域中，影响全身平均比吸收率（SAR）的主要因素尚未得到充分揭示。本研究的主要目的是，在基于解剖结构的模型中，与均匀人体模型及相应长方体模型相比，从全身平均SAR的角度阐明影响电磁功率吸收的主要因素。计算结果表明，共振频率区域的电磁吸收峰值很大程度上取决于组织的电特性，而GHz区域的峰值主要受模型表面积的影响。
