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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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