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Abstract #3110

Improving MRI Near Metal with Local B0 Shimming using a Unified Shim-RF Coil (UNIC): First Case Study, Hip Prosthesis in Phantom.

Fardad Michael Serry1, Junzhou Chen1,2, Anthony G Christodoulou1,2, Yuheng Huang1,2, Fei Han3, Won Bae4,5, Christine Chung4,5, Richard Handlin1, John Stager1, Matthew Dausch1, Yubin Cai1, Yujie Shan1, Yucen Liu1, Yibin Xie1, Xiaoming Bi3, Rohan Dharmakumar1,2, Zhaoyang Fan1,6, Debiao Li1,2, Hsin-Jung Yang1, and Hui Han1
1Biomedical Imaging Research Institute, Cedars-Sinai Medical Center, Los Angeles, CA, United States, 2Department of Bioengineering, UCLA, Los Angeles, CA, United States, 3Siemens Medical Solutions USA, Inc., Los Angeles, CA, United States, 4University of California, San Diego, San Diego, CA, United States, 5VA Medical Center, San Diego, CA, United States, 6University of Southern California Department of Radiology, Los Angeles, CA, United States

Metal artifact image degradation can interfere with tissue status assessment. Metal artifact reduction pulse sequences, mainly spin-echo based, and scanner B0-shimming can mitigate the artifacts. We have tested in a metal hip prosthesis phantom improving shimming locally with a novel technology that integrates separate but co-planar RF receive and shim arrays, expanding the freedom to position shim coils and shape B0, independently of the RF coil geometry and pulse sequence. Metal-induced signal-void artifact was reduced in GRE scans, revealing up to 50% additional area around the prosthesis. The sequence-agnostic technology may help improve MRI near metal prostheses and interventional devices.

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