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首页> 外文期刊>Radiation Protection Dosimetry >SAR DISTRIBUTION IN HUMAN BEINGS WHEN USING BODY-WORN RF TRANSMITTERS
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SAR DISTRIBUTION IN HUMAN BEINGS WHEN USING BODY-WORN RF TRANSMITTERS

机译：使用身体磨损型射频发射器时SAR在人体内的分布

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摘要

This study analyzes the exposure of the human torso to electromagnetic fields caused by wireless body-mounted or handheld devices. Because of the frequency and distance ranges from 30-5800 MHz and 10 to 200 mm, respectively, both near-field and far-field effects are considered. A generic body model and simulations of anatomical models are used to evaluate the worst case tissue composition with respect to the absorption of electromagnetic energy. Both standing wave effects and enhanced coupling of reactive near-field components can lead to a specific absorption rate (SAR) increase in comparison to homogeneous tissue. In addition, the exposure and temperature increase of different inner organs is assessed. With respect to comph'ance testing, the observed SAR enhancement may require the introduction of a multiplication factor for the spatial peak SAR measured in the liquid-filled phantom in order to obtain a conservative exposure assessment. The observed tissue heating at the body surface under adiabatic conditions can be significant, whereas the temperature increase in the inner organs turned out to be negligible for the cases investigated.
机译：这项研究分析了人体躯干在无线人体安装或手持设备引起的电磁场中的暴露。由于频率和距离范围分别为30-5800 MHz和10至200 mm，因此考虑了近场效应和远场效应。使用通用的人体模型和解剖模型的仿真来评估最坏情况下组织成分在电磁能量吸收方面的作用。与均匀组织相比，驻波效应和反应性近场分量的增强耦合都可以导致比吸收率（SAR）的增加。另外，评估了不同内部器官的暴露和温度升高。关于能力测试，观察到的SAR增强可能需要为在液体填充体模中测量的空间峰值SAR引入一个乘数因子，以获得保守的暴露评估。在绝热条件下在体表观察到的组织发热可能很大，而对于所研究的情况，内部器官的温度升高却可以忽略不计。

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