Multi-Coil B0 Shimming with Irregular Coil Arrays

Zhou, J

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Multi-Coil B0 Shimming with Irregular Coil Arrays

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Zhou, J
Department High-Field Magnetic Resonance, Max Planck Institute for Biological Cybernetics, Max Planck Society;
Max Planck Institute for Biological Cybernetics, Max Planck Society;

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https://www.ismrm.org/20/program_files/WE09.htm
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Citation

Zhou, J. (2020). Multi-Coil B0 Shimming with Irregular Coil Arrays. Talk presented at 2020 ISMRM & SMRT Virtual Conference & Exhibition. 2020-08-08 - 2020-08-14.

Cite as: https://hdl.handle.net/21.11116/0000-0006-D913-0

Abstract

Ultra-high field (UHF) magnetic resonance imaging (MRI) enables functional brain images with sub-millimeter spatial resolution. However, susceptibility induced magnetic field (B0) variations within tissue are the source of various artifacts. Shim coils of different shape and size are applied to reduce these B0 inhomogeneity. However, most shim coils only have a regular shape and distribute current pattern on a cylinder surface or close-fit helmet. The difference in performance between current multi coil array and irregular shape multi coil array has not been explored. The optimization methods for multi-coil shim arrays are discussed, together with design and construction procedure.