Abstract #4882
Excitation Performance and SAR Control with Z-Stacked Body RF Coil Arrays in Parallel Transmission at 3T
Xiaotong Zhang 1 , Xiaoping Wu 2 , Jinfeng Tian 2 , Sebastian Schmitter 2 , Lance DelaBarre 2 , Michael Hamm 3 , Josef Pfeuffer 3 , Dingxin Wang 2,4 , Bin He 1,5 , Thomas Vaughan 2 , Kamil Ugurbil 2 , and Pierre-Francois Van de Moortele 2
1
Department of Biomedical Engineering,
University of Minnesota, Minneapolis, MN, United States,
2
Center
for Magnetic Resonance Research, University of
Minnesota, Minneapolis, MN, United States,
3
3Siemens
Healthcare, MR Application Development, Erlangen,
Germany,
4
Siemens
Medical Solutions USA Inc, Minneapolis, MN, United
States,
5
Institute
for Engineering in Medicine, University of Minnesota,
Minneapolis, MN, United States
A High Pass birdcage (32 rungs) driven on two quad ports
(1x2) and three TEM whole body arrays consisting of one
ring (1x8), 2 z-stacked rings (2x8) or 3 z-stacked rings
(3x8) of TEM elements (8 per ring) have been modeled.
Their performance in parallel transmission on spine and
brain+c-spine imaging has been evaluated, in which the
excitation fidelity, RF power, global SAR and peak
10gSAR are compared. RF Spoke placement impact is also
detailed for different coil designs.
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