Abstract #1360
Transmit field fitting at 9.4 T using analytical solutions to Maxwell's equations
Michael Stephen Poole 1 , Desmond H Y Tse 1 , Arthur W Magill 1 , and N Jon Shah 1,2
1
INM-4, Forschungszentrum Jlich, Jlich,
Germany,
2
Department
of Neurology, RWTH Aachen University, Aachen, Germany
Transmit B1+ fields need to be accurately acquired for
B1+ shimming, kt-points homogenisation, spokes slice
selection and parallel RF pulse design. We investigated
the application of forcing relative B1+ maps to obey
Maxwell's equations in order to provide properly scaled
B1+ maps. The method was applied to B1+ maps acquired at
400 MHz in phantom and in vivo and compared to AFI-weighted
B1+ and DREAM maps. Furthermore predicted CP mode and kt-points
excitations were compared and found to be in good
agreement in phantom. The in vivo maps compare
qualitatively well with DREAM but conductivity is poorly
predicted.
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