Abstract #0549
Impact of coupling in Tx-array coil design for transmit SENSE at 3T
Pei-Shan Wei 1,2 , Michael J. Smith 2 , Christopher P. Bidinosti 3 , Jarod Matwiy 2 , and Scott B. King 1,2
1
Department of Physics and Astronomy,
University of Manitoba, Winnipeg, Manitoba, Canada,
2
National
Research Council of Canada, Winnipeg, Manitoba, Canada,
3
Department
of Physics, University of Winnipeg, Winnipeg, Manitoba,
Canada
For determining an optimal Tx-SENSE Tx-array design, we
modeled Tx-arrays with and without proper mutual
inductance coupling and coil termination to compare
accuracy of excitation and SAR. We found that with
incorrect coupling models, average SAR was
over-estimated by as much as 23%, peak SAR
under-estimated by as much as 26%, and peak SAR/Average
SAR underestimated by as much as 40%. Therefore, proper
coupling in simulations is absolutely necessary for RF
coil designers to optimize the Tx-array design for Tx-SENSE
applications and for accurate prediction of peak local
SAR distribution.
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