Dept. of Electrical and Mechanical Engineering, Nagoya Institute of Technology, Nagoya, Japan.
Center of Biomedical Physics and Information Technology, Nagoya Institute of Technology, Nagoya Japan.
Phys Med Biol. 2021 Apr 14;66(8). doi: 10.1088/1361-6560/abf1b7.
International guidelines/standards for human protection from electromagnetic fields have been revised recently, especially for frequencies above 6 GHz where new wireless communication systems have been deployed. Above this frequency a new physical quantity 'absorbed/epithelial power density' has been adopted as a dose metric. Then, the permissible level of external field strength/power density is derived for practical assessment. In addition, a new physical quantity, fluence or absorbed energy density, is introduced for protection from brief pulses (especially for shorter than 10 s). These limits were explicitly designed to avoid excessive increases in tissue temperature, based on electromagnetic and thermal modeling studies but supported by experimental data where available. This paper reviews the studies on the computational modeling/dosimetry which are related to the revision of the guidelines/standards. The comparisons with experimental data as well as an analytic solution are also been presented. Future research needs and additional comments on the revision will also be mentioned.
最近修订了国际人类电磁场保护指南/标准，特别是针对已经部署了新的无线通信系统的 6GHz 以上频段。在这个频率以上，采用了一个新的物理量“吸收/上皮功率密度”作为剂量指标。然后，为了实际评估，导出了外部场强/功率密度的允许水平。此外，还引入了一个新的物理量，即通量或吸收能量密度，用于保护短暂脉冲（特别是短于 10 秒的脉冲）。这些限值是根据电磁和热建模研究明确设计的，旨在避免组织温度过度升高，但在有实验数据支持的情况下，也会考虑这些数据。本文综述了与指南/标准修订相关的计算建模/剂量学研究。还介绍了与实验数据的比较以及解析解。此外，还提到了未来的研究需求和对修订的其他意见。
