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Abstract #3689

Time-Resolved Fetal Cardiac MRI Using Compressed Sensing and Metric Optimized Gating

Christopher W. Roy 1 , Mike Seed 2,3 , and Christopher K. Macgowan 1,3

1 Medical Biophysics and Medical Imaging, University of Toronto, Toronto, Ontario, Canada, 2 Labatt Family Heart Centre, Division of Cardiology, Department of Paediatrics, The Hospital for Sick Children, Ontario, Canada, 3 Diagnostic Imaging, The Hospital for Sick Children, Toronto, Ontario, Canada

A reconstruction method for undersampled time resolved fetal cardiac imaging is presented. First, Metric Optimized Gating is used to reduce artifact from non-gated cardiac motion. Second, Compressed Sensing is employed to reduce artifact from random undersampling. The accuracy of this approach is investigated through a numerical simulation of a prospectively undersampled CINE cardiac MRI acquisition comprised of realistic cardiac motion, heart rate variability, and image noise. Initial feasibility in the fetal population is presented through retrospectively undersampled in utero MRI data.

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