Development of human-body phantoms for evaluation of interaction between the human body and electromagnetic waves

从设计和开发靠近人体的移动通信设备的角度出发，对评估人体对天线特性的影响提出了很高的要求。另一方面，也要求定量评价这些装置辐射的电磁波对人体的影响。然而，用真实的人体进行实验评价是不可能的。因此，不仅要建立数值人体模型，而且要建立实验人体模型，并利用该模型开发评价体系。在这样的背景下，我们开展了微波人体模体的开发研究。1998年，我们研制了生物组织等效的微波固体模体，并提出了基于热成像法的模体与微波相互作用评价体系。此外，我们还利用开发的模型和系统对人体内的SAR进行了评估。我们还开发了人头模型幻影。1999年，研制了以甘油为主要成分的微波生物组织等效模，以提高其保存性。此外，我们还评估了警察、消防和广播领域使用的移动通信设备对应的150 MHz天线与人体的相互作用。从而建立人体与电磁波相互作用的简单评价体系。我们还可以开发具有高保存性的生物组织等效微波模。我们希望我们的结果可以用于评估移动通信设备辐射的电磁波对人体的影响。在进一步的研究中，我们的目标是提高我们的评估系统的精度和改进我们的幻影。

Evaluation of the effects of the human body on antenna characteristics has highly been demanded from the viewpoint of the design and development of mobile communication devices used near the body. On the other hand, the quantitative evaluation of the effects of the electromagnetic waves radiated from these devices on the human body has also been demanded. It is impossible, however, to conduct the experimental evaluation using the real human body. Therefore, we must produce not only the numerical human-body model but also the experimental one and develop the evaluation system using the model. Under such backgrounds, we have performed the research on the development of the human-body phantom for microwave.In 1998, we developed the biological tissue-equivalent solid phantoms for microwave and proposed the evaluation system of interaction between the phantom and microwave on the basis of thermographic method. Moreover, we evaluated the SAR inside the human body by using the developed phantom and system. We also developed the human-head real-model phantom. In 1999, the biological tissue-equivalent phantoms for microwave mainly composed of glycerin were developed to improve the preservation. Moreover, we evaluated the interaction between the human body and the antenna at 150 MHz corresponding to the mobile communication devices used in the fields of police, fire fighting and broadcast.Consequently, we could establish the simple evaluation system of interaction between the human body and the electromagnetic waves. We could also develop the biological tissue-equivalent phantom for microwave with high preservation. We would like to expect that our results is used for evaluation of the effects of the electromagnetic waves radiated from mobile communication devices on the human body. As a further study, we are aiming at the high precision of our evaluation system and the improvement of our phantoms.