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