Keywords: Safety, High-Field MRI, SAR, EM simulation
Motivation: Ensuring subject safety, in particular to limit tissue heating, is a critical aspect of self-developed pTx RF array coils for UHF applications.
Goal(s): Establishing a dependable workflow for accurate simulation, data processing and realization of online supervision of power deposition.
Approach: The workflow relies on cross-comparisons of EM simulation results and intermediate processing steps based on representative excitation modes, and on comparison of measured and simulated field maps.
Results: Consistency was achieved in all cross-comparison steps. Residual discrepancies between measured and simulated B1+ maps require further investigation, but their safety implications can be addressed by an appropriate safety factor.
Impact: A reliable workflow for EM simulation, subsequent data processing, and realization of online SAR monitoring for home-built RF human head array coils at 9.4T is presented. This is an essential building block to ensure subject safety in experimental UHF studies.
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