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Abstract #2670

Selective reacquisition for motion artifact reduction in quantitative T2 mapping of carotid artery vessel wall

Robert Frost1, Aaron T. Hess2, Linqing Li3, Matthew D. Robson2, Luca Biasiolli2, and Peter Jezzard1

1FMRIB Centre, Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, United Kingdom, 2Oxford Centre for Clinical Magnetic Resonance Research, Division of Cardiovascular Medicine, University of Oxford, Oxford, United Kingdom, 3Section on Magnetic Resonance Spectroscopy, National Institute of Mental Health, Bethesda, MD, United States

Ghosting and blurring artifacts caused by swallowing or coughing can be a significant problem in quantitative T2 mapping of atherosclerotic plaque in the carotid artery. The method is based on a multi-slice multiple spin-echo sequence which acquires k-space lines sequentially with a 2 s gap between lines. A navigator echo was added at the end of the echo-train to identify and reacquire data corrupted by motion. The selective reacquisition reduced ghosting and blurring artifacts in healthy volunteer scans with intentional swallowing motion.

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