Numerical Computation of Temperature Elevation in Human Skin Due to Electromagnetic Exposure in the THz Frequency Range
Numerical Computation of Temperature Elevation in Human Skin Due to Electromagnetic Exposure in the THz Frequency Range
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DOI：
10.1109/tthz.2015.2476962
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发表时间：
2015-09
影响因子：
3.2
通讯作者：
O. Spathmann;M. Zang;J. Streckert;V. Hansen;M. Saviz;T. Fiedler;K. Statnikov;U. Pfeiffer;M. Clemens
中科院分区：
文献类型：
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作者：
O. Spathmann;M. Zang;J. Streckert;V. Hansen;M. Saviz;T. Fiedler;K. Statnikov;U. Pfeiffer;M. Clemens
在太赫兹（THz）频率范围内不断发展的新应用，如无线通信系统、全身扫描仪或生物和医疗技术的其他成像程序，迅速增加了可能暴露于这些设备的电磁辐射的人数。在文献中很少发现频率在太赫兹频率范围内的电磁（EM）暴露对人体造成的热效应的研究。本文介绍了一种数值计算人体皮肤在0.1 ~ 10太赫兹电磁场作用下的潜在热响应的方法。该方法首先针对侵彻深度小于1mm的电磁场建立适当的仿真模型。在进一步的步骤中，它涵盖了在“有效介质理论”的帮助下提供绝对需要的介电组织参数，因为通常参考的数据库中没有列出100 GHz以上的材料特性。计算了不同复杂程度的人体皮肤模型在电磁照射下的吸收功率，并以此为热源进行温度模拟。空间和时间依赖的温度分布在组织中分析瞬态和连续暴露。
The ongoing development of new applications in the terahertz (THz) frequency range, such as wireless communication systems, full-body scanners, or other imaging procedures for biological and medical techniques, rapidly increases the number of persons who are potentially exposed to the electromagnetic radiation of those devices. Studies of thermal effects in humans caused by electromagnetic (EM) exposure with frequencies in the THz frequency range can rarely be found in the literature. In this paper, a method for the numerical computation of a potential thermal response in human skin due to EM fields between 0.1 and 10 THz is introduced. The method starts with the development of adequate simulation models for EM fields with penetration depths less than 1 mm. In a further step, it covers the provision of absolutely needed dielectric tissue parameters with help of the “effective medium theory,” since material properties above 100 GHz are not listed in the commonly consulted databases. The absorbed power in EM exposed human skin models of different complexity is calculated and subsequently used as heat source for temperature simulations. Spatial and time-dependent temperature profiles in the tissue are analyzed for transient and continuous exposures.