生物电磁剂量学及人体吸收电磁剂量的数值分析

The Bioelectromagnetics Dosimetry and Numerical Analysis of Electromagnetic Dose Absorbed by Human Body

本研究首先概述了生物电磁剂量学的基本内容,接着说明求取人体所吸收电磁剂量的理论剂量学方法及其具体实施步骤,最后,用FDTD这一理论剂量学方法计算了频率为300MHz和1000MHz的正弦电磁波在归一化(即环境功率密度为1mW/cm2)照射条件下人体内的分布比吸收率SAR(r)、人体主要组织的平均比吸收率SARa和在该组织中SAR(r)的最大值、求出了人体全身平均比吸收率WBA-SAR、绘制了人体各剖面层的平均比吸收率SARa沿人体纵向的分布曲线。本研究所列的分析方法和实施步骤,可适于求取任意频率正弦电磁波照射下人体及各组织的SAR(r)和SARa,因而可为电磁波的生物学效应研究、效应机理研究、效应应用研究和非电离电磁辐射安全标准的制定奠定量化基础。

In this paper, elementary knowledge of bioelectromagnetic dosimetry was summarized, the method and step of theoretical bioelectromagnetic dosimetry used to compute electromagnetic dose absorbed by human body were expounded, at the frequencies 300MHz and 1000MHz, and at the environment power-flux-density lmW/cm2, the distribution specific absorption rate SAR（r） in human body, the average specific absorption rate SARa of every tissue and whole body average specific absorption rate WBA-SAR were computed by the FDTD method, the longitudinal contribution curves of the average specific absorption rate SARa absorbed by the cross section of human body were drawn. The analysis method and implement step can be used to compute the SAR（r）, SARa and WBA-SAR at any sine electromagnetic waves, therefore, the analysis method can lay quantitative foundation of research on the bioeffects of electromagnetic waves, on the mechanism of the bioeffects, on application of the bioeffects, and on the formulation for safety standard of electromagnetic wave radiation.