The Calculation of Localised SAR in a 2 mm Resolution Anatomically Realistic Model of the Lower Leg

1 August 1997

journal article
Published by Oxford University Press (OUP) in Radiation Protection Dosimetry

Vol. 72 (3) , 321-326
https://doi.org/10.1093/oxfordjournals.rpd.a032104

Abstract

The ankle region has a narrow cross section and contains little high conductivity muscle, consisting mainly of low conductivity bone, tendon and fat. Consequently there is a channelling of the current through the high conductivity muscle which produces high localised values of SAR. Quasi-static calculations are presented of the SAR in the lower leg of the NRPB anatomically realistic voxel model, NORMAN. SAR values averaged over 100 g for a unit injected current at the top of the lower leg are calculated. These values when coupled with previously calculated ankle currents for whole body irradiation are used to derive external field guidance levels.

Keywords

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