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Abstract #1413

Feasibility of real-time MRI of the actively moving wrist at 0.55 Tesla

Yongwan Lim1, Sophia X. Cui2, Robert M. Szabo3, Robert D. Boutin4, Abhijit J. Chaudhari5, and Krishna S. Nayak1
1Ming Hsieh Department of Electrical and Computer Engineering, University of Southern California, Los Angeles, CA, United States, 2Siemens Medical Solutions USA, Inc., Los Angeles, CA, United States, 3Orthopaedic Surgery, University of California Davis, Davis, CA, United States, 4Radiology, Stanford University School of Medicine, Stanford, CA, United States, 5Radiology, University of California Davis, Davis, CA, United States


In this work we show results from a first-in-human study utilizing a high-performance 0.55T system and balanced SSFP (bSSFP) real-time MRI acquisition to assess tissues of the actively moving wrist’s uninterrupted radial-ulnar deviation and clenched fist maneuvers. We show that at 0.55T, bSSFP is less sensitive to off-resonance and banding artifacts that frequently obscure critical wrist structures. We show that the high temporal resolution of 25 ms per frame at high-performance 0.55T enables improved characterization of wrist joint motion. These benefits could make it a promising technology to evaluate dynamic wrist instability.

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