%0 Journal Article
%T The Impact of Thermal Modeling on Limiting RF-EMF
%A Norbert Leitgeb
%J Journal of Electromagnetic Analysis and Applications
%P 137-144
%@ 1942-0749
%D 2013
%I Scientific Research Publishing
%R 10.4236/jemaa.2013.54022
%X <p class=\"MsoNormal\" style=\"text-align:justify;\">
	<span lang=\"EN-US\">The paper quantitatively assesses the
relationship between</span><span lang=\"EN-US\"> </span><span lang=\"EN-US\">specific
energy absorption rates (<i>SAR</i>) of
radio frequency (RF) electromagnetic fields (EMF) and resulting intracorporal
tissue temperature changes (<span style=\"font-size:10.5pt;font-family:;\" \"=\"\">жд</span><i>T</i>) at
whole body exposure of a small person to resonant</span><span lang=\"EN-US\"> </span><span lang=\"EN-US\">RF EMF. Applied thermal modeling</span><span lang=\"EN-US\"> </span><span lang=\"EN-US\">allowed accounting also for</span><span lang=\"EN-US\"> </span><span lang=\"EN-US\">dynamic thermoregula</span><span lang=\"EN-US\">tory responses.</span><span lang=\"EN-US\"> </span><span lang=\"EN-US\">As expected from physical laws the
correlation of all</span><span lang=\"EN-US\"> </span><span lang=\"EN-US\">local <i>SAR</i> values and <span style=\"font-size:10.5pt;font-family:;\" \"=\"\">жд</span><i>T</i> data was fairly good. However, at local level <i>SAR</i> proved to be only weakly associated
with <span style=\"font-size:10.5pt;font-family:;\" \"=\"\">жд</span><i>T</i>.</span><span lang=\"EN-US\"> </span><span lang=\"EN-US\">Even if averaged</span><span lang=\"EN-US\">,</span><span lang=\"EN-US\"> over any <st1:chmetcnv unitname=\"g\" sourcevalue=\"10\" hasspace=\"True\" negative=\"False\" numbertype=\"1\" tcsc=\"0\" w:st=\"on\">10 g</st1:chmetcnv> tissue the ratio <span style=\"font-size:10.5pt;font-family:;\" \"=\"\">жд</span><i>T</i><st1:chmetcnv unitname=\"g\" sourcevalue=\"10\" hasspace=\"False\" negative=\"False\" numbertype=\"1\" tcsc=\"0\" w:st=\"on\"><sub>10g</sub></st1:chmetcnv>/<i>SAR</i><st1:chmetcnv unitname=\"g\" sourcevalue=\"10\" hasspace=\"False\" negative=\"False\" numbertype=\"1\" tcsc=\"0\" w:st=\"on\"><sub>10g</sub></st1:chmetcnv></span><span lang=\"EN-US\"> </span><span lang=\"EN-US\">still varied by almost two orders of
magnitudes. Blood perfusion was found to play a major role in</span><span lang=\"EN-US\"> </span><span lang=\"EN-US\">affecting local temperature changes
and caused even net cooling. The results demonstrate that local <i>SAR</i> 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</span><span lang=\"EN-US\"> </span><span lang=\"EN-US\">not only with regard to whole-body <i>SAR</i>
%K Electromagnetic Fields
%K Radio Frequency
%K Health Risks
%K Tissue Heating
%K Specific Absorption Rate
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=29640