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Abstract #2686

Optimizing Metal Related Artifact Reduction MRI at 3T: Circular versus Elliptical Radiofrequency Pulse Polarization

Iman Khodarahmi1, John Kirsch2, Gregory Chang1, and Jan Fritz3
1New York University School of Medicine, New York, NY, United States, 2Massachusetts General Hospital, Boston, MA, United States, 3Johns Hopkins Hospital, Baltimore, MD, United States

Clinical metal artifact reduction techniques address B0 inhomogeneity-induced artifacts; whereas other source of artifacts, such as B1 inhomogeneity remain unaddressed. However, B1 inhomogeneity can be reduced by implementing an elliptical polarization of the radiofrequency pulse. In an in-vitro setup of hip arthroplasty implants, we show that MRI with elliptical pulse polarization results in stronger metal artifact reduction and overall superior image quality than circular polarization without increase in SAR values.

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