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Abstract #0776

Motion-compensated reconstruction of fetal cardiac MRI using a golden-angle radial acquisition, retrospective gating, and compressed sensing

Christopher W. Roy1,2, Mike Seed3,4, and Christopher K. Macgowan1,2

1Medical Biophysics, University of Toronto, Toronto, ON, Canada, 2Physiology and Experimental Medicine, Hospital for Sick Children, Toronto, ON, Canada, 3Pediatric Cardiology, Hospital for Sick Children, ON, Canada, 4Pediatric and Diagnostic Imaging, University of Toronto, Toronto, ON, Canada

Fetal cardiac MRI requires high spatial and temporal resolution but is often limited by stochastic and periodic motion. To compensate for these sources of artifact, a radial golden-angle acquisition was used to acquire and reconstruct real-time fetal cardiac images. In-plane motion and fetal heart rate were then calculated from the real-time images and used to reconstruct reordered CINE images at high spatial and temporal resolution. Using this approach, motion-robust imaging of the fetal heart was successful in seven pregnant volunteers for both short-axis and long-axis multi-slice acquisitions.

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