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Abstract #0683

Clinical Assessment of Knee MRI in the Presence of Metal Implants Comparing MAVRIC-SL and FSE at 1.5T and 3T

Hans Liebl1, Ursula Heilmeier1, Sonia Lee1, Lorenzo Nardo1, Christopher Schuppert1, Misung Han1, Suchandrima Banerjee2, Kevin Koch3, Thomas M. Link1, Roland Krug1

1Department of Radiology and Biomedical Imaging, University of California San Francisco, San Francisco, CA, United States; 2GE healthcare, Menlo Park, CA, United States; 3GE healthcare, Milwaukee, WI, United States

3D Multi-Spectral Imaging techniques such as MAVRIC and SEMAC are currently being investigated to improve MR-imaging in the presence of metal hardware. We study the performance of MAVRIC-SL at 1.5T vs. 3T compared to standard-of-care sequences. Detection rates for cartilage and bone lesions created in the proximity of metallic hardware placed in twelve pigknee specimens were analyzed and the sizes of artifacts measured. Preliminary data analysis indicates significantly better lesion detection in MAVRIC compared to conventional sequences at both field strengths. Comparing field strenghts, no significant differences were found in lesion detection, but artifact sizes were measured larger at 3T.