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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