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The Impact of Thermal Modeling on Limiting RF-EMF

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Author(s): Norbert Leitgeb

Journal: Journal of Electromagnetic Analysis and Applications
ISSN 1942-0730

Volume: 05;
Issue: 04;
Start page: 137;
Date: 2013;
Original page

Keywords: Electromagnetic Fields | Radio Frequency | Health Risks | Tissue Heating | Specific Absorption Rate

ABSTRACT
The paper quantitatively assesses the relationship between specific energy absorption rates (SAR) of radio frequency (RF) electromagnetic fields (EMF) and resulting intracorporal tissue temperature changes (ΔT data was fairly good. However, at local level SAR proved to be only weakly associated with ΔT10g/SAR10g still varied by almost two orders of magnitudes. Blood perfusion was found to play a major role in affecting local temperature changes and caused even net cooling. The results demonstrate that local SAR is a poor surrogate for local temperature change, and that conventional static thermal modeling underestimates body core temperature. Results demonstrated that recommended reference levels of RF EMF fail to reliably prevent from exceeding yet legally binding basic restrictions not only with regard to whole-body SAR but also with regard to whole-body temperature rise (
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