Application of postured human model for SAR measurements

[摘要] In the last two decades, the increasing number of electronic devices used inday-to-day life led to a growing interest in the study of theelectromagnetic field interaction with biological tissues. The design ofmedical devices and wireless communication devices such as mobile phonesbenefits a lot from the bio-electromagnetic simulations in which digitalhuman models are used.

The digital human models currently available have an upright position whichlimits the research activities in realistic scenarios, where postured humanbodies must be considered. For this reason, a software application called"BodyFlex for CST STUDIO SUITE" was developed. In its currentversion, this application can deform the voxel-based human model named HUGO(Dipp GmbH, 2010) to allow the generation of common postures that people usein normal life, ensuring the continuity of tissues and conserving the massto an acceptable level. This paper describes the enhancement of the"BodyFlex" application, which is related to the movements of the forearmand the wrist of a digital human model.

One of the electromagnetic applications in which the forearm and the wristmovement of a voxel based human model has a significant meaning is themeasurement of the specific absorption rate (SAR) when a model is exposed toa radio frequency electromagnetic field produced by a mobile phone. CurrentSAR measurements of the exposure from mobile phones are performed with theSAM (Specific Anthropomorphic Mannequin) phantom which is filled with adispersive but homogeneous material. We are interested what happens with theSAR values if a realistic inhomogeneous human model is used. To this aim,two human models, a homogeneous and an inhomogeneous one, in two simulationscenarios are used, in order to examine and observe the differences in theresults for the SAR values.

[学科分类] 电子、光学、磁材料