Correlation of psSAR and tissue specific temperature for 7T pTx head coils - a large scale simulation study

Currently, psSAR10g is the basic safety measure for transmit coil arrays. But there is little knowledge about the correlation of psSAR10g with local tissue temperature which determines the risk of tissue damage according to the thermal dose concept. In this study we performed thermal simulations for a large set of steering conditions, i.e. amplitudes and phases of the driving voltages of a 7T 8-channel head coil array, in order to determine the maximum steady state temperatures of different tissue types. A fast implementation of Pennes Bioheat Equation on a GPU was developed which allows to perform >1000 simulation runs in a reasonable time.

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