Abstract #0548
Direct control of the temperature rise in parallel transmission via temperature virtual observation points: simulations at 10.5 T
Nicolas Boulant 1 , Xiaoping Wu 2 , Gregor Adriany 2 , Sebastian Schmitter 2 , Kamil Ugurbil 2 , and Pierre-Francois Van de Moortele 2
1
NeuroSpin, CEA, Saclay, Ile de France,
France,
2
Center
for Magnetic Resonance Research, University of
Minnesota, Minneapolis, MN, United States
We report a parallel transmission radiofrequency pulse
design algorithm under strict temperature rise
constraints. The latter are directly enforced by using
an equivalent SAR virtual observation point model, this
time based on temperature that we shall name
T(Temperature)VOPs. Simulations are performed at 10.5 T
with a 16 channels coil on the Duke head model, and with
Time-Of-Flight sequences of various durations. The
algorithm here benefits from the lack of direct
correspondence between the SAR and temperature to return
in all cases more powerful and safer RF pulses than the
ones returned by a traditional SAR-constrained pulse
design.
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