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Abstract #3961

Modeling Factors Affecting SAR Distribution in UHF MRI: Mesh Density, Body Scaling, and Simplification of the Models

Farzad Jabbarigargari1, Maxim Terekhov1, and Laura Maria Schreiber1
1Chair of Molecular and Cellular Imaging, Comprehensive Heart Failure Center, University Hospital Wuerzburg, Wuerzburg, Germany

Synopsis

Keywords: Safety, Safety

Motivation: Human body modeling in electromagnetic (EM) simulations is crucial as it directly impacts the accuracy of the EM simulations.

Goal(s): The goal is to analyze the impact of mesh density, model scaling and simplifications on SAR.

Approach: An 8Tx/16Rx coil is used with human models to evaluate the EM field distribution.

Results: A higher number of mesh cells reduces discrepancies in SAR distribution by up to 52%. Geometric scaling down can increase peak SAR by 50%. Simplifying human models leads to a 14% difference in SAR distribution for the female model compared to the original model with full tissue types.

Impact: This study discusses how body modeling in EM simulations impacts the SAR at UHF MRI.

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