Evaluating a Volumetric High-Permittivity (HPM) Helmet for Brain Imaging at 3.0 T
Karthik Lakshmanan1,2, Jezry Walczyk1,2, Sebastian Rupprecht3, Michael T Lanagan3, Qing X Yang3, Ryan Brown1,2,4, and Christopher Collins1,2,4
1Bernard and Irene Schwartz Center for Biomedical Imaging, Department of Radiology, NYU Grossman School of Medicine, Newyork, NY, United States, 2Center for Advanced Imaging Innovation and Research (CAI2R), Department of Radiology, NYU Grossman School of Medicine, New york, NY, United States, 3HyQRS, LLC, State College, PA, United States, 4Vilcek Institute of Graduate Biomedical Science, NYU Grossman School of Medicine, New york, NY, United States
A thin (8mm) helmet-shaped shell of high-permittivity material (HPM) is seen to double transmit efficiency and increase SNR by 40% at the center of tissue equivalent head phantom when compared to the body coil alone, with little effect on B1 homogeneity within the brain region. While evaluation of effects on receive arrays is ongoing, from the results shown here it seems an HPM helmet could be used at 3T in place of more electronically cumbersome head transmit coils.
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