Abstract #2127

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

Pranav S. Athalye¹, Milan M. Ilic^1,2, 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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