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Abstract #1369

EMF exposure and temperature increase of anatomical pregnant women models within a 3T RF shimmed birdcage.

Manuel Murbach 1 , Esra Neufeld 1 , Fraser JL Robb 2 , and Niels Kuster 1,3

1 ITIS Foundation, Zurich, Switzerland, 2 GE Healthcare, Aurora, OH, United States, 3 Swiss Federal Institute of Technology (ETH), Zurich, Switzerland

Our study investigates the effect of RF shimming at 3T on EMF exposure and subsequent temperature increases in pregnant women of different gestational periods. The effect of relative I-Q phases and amplitudes is investigated in terms of B1+ uniformity (CV(B1+)) and local SAR enhancements. For selected worst-case scenarios, thermal simulations − including local thermoregulation − estimate the potential temperature increase in the mother, amniotic fluid, and fetus. Preliminary results indicate a relatively low thermal load for the fetus (< 38C) when considering local thermoregulation of the mother in the normal operating mode.

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