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Abstract #1318

Effects of Co-Planar Element Shielding on Array Performance at 7T

Samantha By 1 , Joseph V. Rispoli 1 , Ivan Dimitrov 2,3 , Sergey Cheshkov 2,4 , Craig Malloy 2,4 , Steven M. Wright 1,5 , and Mary Preston McDougall 1,5

1 Biomedical Engineering, Texas A&M University, College Station, TX, United States, 2 Advanced Imaging Research Center, University of Texas Southwestern Medical Center, Dallas, TX, United States, 3 Philips Medical Systems, Cleveland, OH, United States, 4 Radiology, University of Texas Southwestern Medical Center, Dallas, TX, United States, 5 Electrical and Computer Engineering, Texas A&M University, College Station, TX, United States

At higher field strengths, shielding of RF coils to mitigate radiation losses becomes increasingly necessary. In an array configuration, however, shielding individual elements can be complex, particularly when the elements are overlapped for geometric decoupling. This work presents the benefits of a co-planar shielding configuration of the elements of an overlapped array at 7T. Compared to the unshielded array, the shielded array provided a 39% improvement in mean SNR throughout the entire phantom, an average decrease in mean g-factors for all three views of 8.9%, and a lower power setting required to produce a 90 degree tip angle.

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