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Abstract #3891

Evaluating both Normal and Ectopic Cardiac Cycles in Patients with Arrhythmias Using Free-Breathing Compressed Sensing MRI with Physiological Motion Synchronization

Li Feng 1 , Leon Axel 1 , Darragh Halpenny 1 , Larry Latson 1 , Jian Xu 2 , Daniel K Sodickson 1 , and Ricardo Otazo 1

1 Bernard and Irene Schwartz Center for Biomedical Imaging, Department of Radiology, New York University, School of Medicine, New York, New York, United States, 2 Siemens Medical Solutions, New York, New York, United States

Evaluation of myocardial function using MRI is challenging in patients with arrhythmias, due to the difficulty of synchronizing disparate cardiac cycles. In order to achieve successful reconstruction, ectopic cardiac cycles are usually detected and discarded, which may potentially lose some clinically useful information. In this work, we propose to acquire data continuously using golden-angle radial trajectories in free-breathing and detect cardiac cycles with differing lengths, followed by reconstruction with synchronized but separated cardiac and respiratory dimensions, including separate normal and ectopic cardiac cycles, which provides additional information for potential clinical use. The method was compared to the conventional breath-hold approach.

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