Abstract #0380
Correlation of psSAR and tissue specific temperature for 7T pTx head coils - a large scale simulation study
Frank Seifert 1 , Gerd Weidemann 1 , and Bernd Ittermann 1
1
Physikalisch-Technische Bundesanstalt (PTB),
Braunschweig und Berlin, Germany
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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