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Abstract #0068

Metric Optimized Gating for Fetal Cardiac MR Imaging

Michael Shelton Jansz1,2, Mike Seed3, Joshua F. van Amerom1,2, Shi Joon Yoo3,4, Christopher K. Macgowan1,2

1Medical Biophysics, University of Toronto and Hospital for Sick Children, Toronto, Ontario, Canada; 2Medical Imaging, University of Toronto and Hospital for Sick Children, Toronto, Ontario, Canada; 3Pediatric Cardiology, University of Toronto and Hospital for Sick Children, Toronto, Ontario, Canada; 4Dignostic Imaging, University of Toronto and Hospital for Sick Children, Toronto, Ontario, Canada


Phase-contrast MRI of pulsatile flow typically requires cardiac gating; however, a gating signal is not necessarily available in utero for fetal cardiac imaging. We propose a new technique for reconstructing ungated data where the gating is determined retrospectively by optimizing an image metric. Simulations and in vivo data are presented to demonstrate the feasibility of this technique.