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Abstract #2972

Design of Shim Coil Arrays for Improving B0 Homogeneity in Brachial Plexus MRI at 3T

Yun Shang1, Ziyang Long1,2,3, Archana Vadiraj Malagi2, Leiyu Wang1, Melody Binesh1, Garima Diwan1,2, Xuanyu Zhu1, Jeremy Zepeda2, Fardad Michael Serry2, Nader Binesh4, Hsin-Jung Yang2, and Hui Han1
1MRI Research Institute, Department of Radiology, Weill Medical College of Cornell University, New York, NY, United States, 2Biomedical Imaging Research Institute, Cedars-Sinai Medical Center, Los Angeles, CA, United States, 3Department of Bioengineering, University of California, Los Angeles, Los Angeles,, CA, United States, 4Department of Imaging, Cedars-Sinai Medical Center, Los Angeles, CA, United States

Synopsis

Keywords: Neurography, Shims

Motivation: Brachial plexus MRI at 3T is challenged by complex B0 inhomogeneities in the neck-shoulder region. Various body shapes and sizes in the population require research efforts to obtain those field distributions and design advanced shim coil arrays with body conditions similar to patients.

Goal(s): Design shim coil arrays to minimize B0 inhomogeneities on the neck-shoulder.

Approach: Numerical simulations of field distributions were performed based on whole-body CT images in a patient cohort. Multiple designs of shim coil arrays were tested on those field maps.

Results: The simulation-derived optimal shim coil arrays substantially reduce B0 inhomogeneities on the neck-shoulder of in vivo-acquired field maps.

Impact: B0-simulation-guided shim coil array design provides an efficient and economical way to derive optimized coil geometry that is applicable to patients with various body sizes and shapes, leading to a substantial reduction of B0 inhomogeneity for brachial plexus imaging.

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Abstract

Keywords