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Abstract #2668

Fast Subject-Specific SAR Calculation for Multi-Channel RF Transmission

Shumin Wang1

1Auburn University, Auburn, AL, United States

Safety assessment for multi-channel RF transmission systems requires the analysis of specific absorption rate (SAR) in a subject-specific manner. Since SAR depends on individual subject anatomy and on the multi-channel excitation scheme, traditional approaches that rely on generic subject models and worst-case scenario evaluations may result in excessive overestimations. With the advancement of computational electromagnetics techniques, fast full-wave simulations of actual subject models have been proposed. In this study, we demonstrate that high simulation accuracy can be achieved with these techniques in real time.

Keywords

absorption account accuracy accurate accurately achieved actual advancement advantage ampere anatomically anatomy anisotropic applied approaches assessment auburn automatic axial become better beyond birdcage body calculation channel check close closely coil coils comes comparing computation computational connected considered consistence constructed contour core degree deposition detailed dielectric diffusion discarded duke edges efficiency eight electric ensure entire evaluations excessive expect extract extracted fast fields filter finally finite flowchart form full generate generation generic geometry gold head highly homogeneous human hybrid ideally individual inhomogeneity inhomogeneous inside interface little location long manner maps match material meaningless mesh meshing minimizes mode model modeling models moment neighboring noise numerical overview pair part passed peak phantom power practically preserved preserving procedure procedures processed processing program proposed quality real receive reduces rely required retained safety scenario scheme scout sharp simulated simulation simulations since skin slice starts subject suboptimal superior surface table tolerable transceiver transmission transmit typical uncertainties wave worst yield