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STATISTICAL MULTIPATH EXPOSURE OF A HUMAN IN A REALISTIC ELECTROMAGNETIC ENVIRONMENT

Vermeeren, Günter; Joseph, Wout; Olivier, Christof; Martens, Luc*

doi: 10.1097/01.HP.0000298816.66888.05
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A new and fast numerical method is presented to assess the whole-body averaged specific absorption rate (SAR) in a human body model in a realistic electromagnetic environment. The method requires a minimum set of initial numerical simulations with a 3D electromagnetic solver. From the initial simulation results, the absorption can be quickly (within 1 s) determined in a realistic electromagnetic environment. The realistic electromagnetic environment has been modeled as a finite sum of incident plane waves. The presented fast method serves as a substitute for brute-force 3D electromagnetic simulations. Therefore, the method must only be validated with brute-force 3D electromagnetic simulations in terms of whole-body averaged SAR, and excellent agreement has been observed. The method has been applied to assess the cumulative distribution function of the whole-body averaged SAR in a spheroid human body model for four types of realistic electromagnetic environments. We observed that for all the four environments the whole-body averaged SAR complies with the International Commission on Non Ionizing Radiation Protection basic restriction for general public. Furthermore, the whole-body averaged SAR for a realistic exposure exceeds the worst-case single plane wave exposure in approximately 10% of the exposure samples. Health Phys. 94(4):345–354; 2008

* Ghent University/IBBT, Faculty of Engineering, Department of Information Technology, Gaston Crommenlaan 8, Box 201, B-9050 Ghent, Belgium.

For correspondence contact G. Vermeeren at the above address, or email at Günter.Vermeeren@intec.UGent.be.

(Manuscript accepted 26 October 2007)

©2008Health Physics Society