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01/05/2006

The Dependence of Electromagnetic Far-field Absorption on Body Tissue Composition in the Frequency Range from 300 MHz to 6 GHz

Andreas Christ, Anja Klingenböck, Theodoros Samaras, Cristian Goiceanu, and Niels Kuster, in IEEE Transactions on Microwave Theory and Techniques, Volume 54, Number 5, pp. 2188–2195, May 2006


This study extends the results of Drossos et al. (2000) to all body tissues with respect to worst-case exposure. The analysis shows a significant increase of 2.2-4.7 dB of the peak spatial specific absorption rate (SAR) in comparison to the values assessed with current standard liquids as a result of standing-wave effects in tissues with low water content. Significant enhancements can be found at distances smaller than 3. Nevertheless, a sound conservative exposure assessment applying phantoms filled with homogeneous standardized liquids is possible if a distance and frequency-dependent scaling factor is applied.

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