Abstract #4332

The numerical limitation of Multi-coil shim and Orthogonal RF-Shim coil

Jiazheng Zhou¹, Pu-Yeh Wu¹, Jason P. Stockmann^2,3, and Fa-Hsuan Lin^1,4

¹Institute of Biomedical Engineering, National Taiwan University, Taipei City, Taiwan, ²A. A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Charlestown, MA, United States, ³Harvard Medical School, Boston, MA, United States, ⁴Department of Neuroscience and Biomedical Engineering, Aalto University, Espoo, Finland

We used numerical simulations to study the relationship between attainable field homogeneity and the number as well as the orientation of shim coils in a multi-coil shim array. We found that, constrained the same number of shim coils, arranging shim coils in three orthogonal directions can provide the best shimming. Inspired by simulations, we propose a design of the integrated RF-shim coil at 3 T to place shim and RF coil orthogonally.

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