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
ITIS Foundation, Zurich, Switzerland,
Healthcare, Aurora, OH, United States,
Federal Institute of Technology (ETH), Zurich,
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
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