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Abstract #0291

New MR Imaging Methods for Metallic Implants in the Knee: Artifact Correction & Clinical Impact

Christina A. Chen1, Weitian Chen2, Stuart B. Goodman, Brian A. Hargreaves, Kevin M. Koch2, Wenmiao Lu3, Anja C. Brau2, Hillary J. Braun, Garry E. Gold

1Radiology, Stanford University, Stanford, CA, USA; 2GE Healthcare Applied Science Lab; 3Nanyang Technological University

Slice Encoding for Metal Artifact Correction (SEMAC) is a recently developed MRI method that corrects for the metal-induced artifact that has previously limited the diagnostic value of postoperative images. This study found SEMAC to accurately measure metallic implant rotation in the knee, as implant misalignment is an important cause of implant pain and revision surgery. In addition, SEMAC significantly reduces artifact compared to fast spin echo in subjects, allowing for visualization of knee pathology that was able to guide patient management.