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Abstract #1564

Effects of Parallel Imaging Acceleration on SNR Improvement with a High-Permittivity Helmet Shaped Former at Different Field Strengths

Giuseppe Carluccio1,2, Bei Zhang1,2, Riccardo Lattanzi1,2, Gregor Adriany3, Kamil Ugurbil3, and Christopher Michael Collins1,2

1Radiology, Center for Advanced Imaging Innovation and Research (CAI2R), New York, NY, United States, 2Radiology, Bernard and Irene Schwartz Center for Biomedical Imaging, New York, NY, United States, 3University of Minnesota, Minneapolis, MN, United States

Use of high-permittivity materials has recently shown very promising results in terms of reduction of B1 inhomogeneities and increase of SNR. In particular, significant SNR increases have been predicted for a high-permittivity helmet former within a close fitting head array. With this solution, for a 7T MRI system, an average SNR increase approaching 50% was obtained in the brain with SNR peak improvements of more than 200%. Until now, however, the effects of the high-permittivity helmet on g-factor and parallel imaging have not been examined. In this work, for three different acceleration rates we evaluate the impact of gfactor when a high-permittivity helmet shaped former is used in two different head arrays at two different field strengths.

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