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 Chen^1,2, Anthony G Christodoulou^1,2, Yuheng Huang^1,2, Fei Han³, Won Bae^4,5, Christine Chung^4,5, Richard Handlin¹, John Stager¹, Matthew Dausch¹, Yubin Cai¹, Yujie Shan¹, Yucen Liu¹, Yibin Xie¹, Xiaoming Bi³, Rohan Dharmakumar^1,2, Zhaoyang Fan^1,6, Debiao Li^1,2, 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.

This abstract and the presentation materials are available to members only; a login is required.

Join Here