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Abstract #2127

Multi-Channel Helical-Antenna Inner-Volume RF Coils for Ultra-High-Field MR Scanners

Pranav S. Athalye1, Milan M. Ilic1,2, Pierre-Francois Van de Moortele3, Andrew J. M. Kiruluta4, and Branislav M. Notaros1

1Department of Electrical and Computer Engineering, Colorado State University, Fort Collins, CO, United States, 2School of Electrical Engineering, University of Belgrade, Belgrade, Yugoslavia, 3Center for Magnetic Resonance Research, Department of Radiology, University of Minnesota, Minneapolis, MN, United States, 4Radiology Department, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States

RF coil design for human ultra-high-field scanners is an area of intense development, to address difficult challenges including RF excitation spatial heterogeneity and low RF efficiency. We present the development and testing of a novel category of multi-channel RF volume coil structures at both 7T and 10.5T based on a subject-loaded multifilar helical-antenna RF coil. Phantom data show excellent consistency between numerical simulations and experimental results with 4- and 8-channel helical-antenna coil prototypes. This design shows capability for multi-channel RF-transmit technology and parallel imaging. This work may help decide which coil structure should be used for future studies at 10.5T.

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