Abstract #0649

Metal Artifact Reduction MRI for the Assessment of the Rotational Alignment Knee Arthroplasty Implants: Compressed Sensing SEMAC TSE versus High-Bandwidth TSE

Filippo Del Grande^1,2, Benjamin Fritz³, Satre Stuelke⁴, Steven E Stern⁵, Susanne Bensler³, and Jan Fritz¹

¹Radiology, The Johns Hopkins University School of Medicine, Baltimore, MD, United States, ²Radiology, Ospedale Regionale di Lugano, Lugano, Switzerland, ³Radiology, Orthopedic University Hospital Balgrist, Zurich, Switzerland, ⁴Radiology, The Johns Hopkins University School of Medicine, Baltimore, MD, ⁵Queensland University of Technology

Malrotation of knee arthroplasty implants is a source of pain following total knee arthroplasty and maybe measured on metal artifact reduction MR images; however, it is unclear which technique is best. Therefore, we compared the reliability, repeatability, and precision of rotational alignment measurements that were obtained on optimized high-bandwidth and compressed sensing SEMAC TSE MR images and their relationships with symptoms. CS-SEMAC TSE MRI afforded the highest reliability, repeatability and precision of rotational alignment measurements, which correlate best with symptoms. CS-SEMAC TSE MRI may be preferred over high-BW TSE for rotational alignment measurements of knee arthroplasty implants.

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