Abstract #0007

Dynamic Imaging of the Fetal Heart Using Metric Optimized Gating

Christopher W. Roy¹, Mike Seed²,³, Joshua F. P. van Amerom¹,³, Bahiyah Al Nafisi², Lars Grosse-Wortmann²,³, Shi-Joon Yoo²,³, Christopher K. Macgowan¹,³

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

A metric-based image reconstruction method is developed and validated for CINE MR imaging of the fetal heart. This method, known as metric optimized gating (MOG), is adapted from a previous study of fetal blood flow. It involves oversampling k-space and then reconstructing images according to an iterative model of the subject’s cardiac cycle. Image quality is optimized through the minimization of an image metric (entropy). Here, the approach is validated in healthy adult volunteers through qualitative and quantitative comparison to gold standard ECG gating. Dynamic CINE images of a normal fetal heart are presented.