In this study, we compared the temperature increase in a phantom and three human legs that were calculated by the simulations, measured by the MR-thermometry, and the optical thermocouples (phantom only), with good agreement between the modalities. IEC guidelines require simulations of SAR along with validation in phantoms to ensure safety. While it is likely impossible to simulate every possible pulse shape and phase combination in a pTx system with a large number of transmit channels, the results we present here suggest that simulations plus MR-thermometry could provide the verification currently lacking in pTx studies.
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