Abstract #2829

Independent phantom validation of Metric Optimized Gating for fetal cardiovascular phase-contrast flow imaging and application in a second center

Sebastian Lars Bidhult^1,2, Johannes Töger¹, Einar Heiberg^1,2, Erik Hedström^1,3, and Anthony H Aletras^1,4

¹Clinical Sciences Lund, Clinical Physiology, Lund University, Skane University Hospital, Lund, Sweden, ²Biomedical Engineering, Faculty of Engineering, Lund University, Lund, Sweden, ³Diagnostic Radiology, Lund University, Skane University Hospital, Lund, Sweden, ⁴Laboratory of Computing and Medical Informatics, Aristotle University, School of Medicine, Thessaloniki, Greece

Fetal cardiovascular MRI may enhance clinical flow measurements. The lack of fetal ECG for gating however makes phase contrast (PC) flow quantification challenging. Metric Optimized Gating (MOG) overcomes this limitation, but is currently applied only in a single center. We provide independent pulsatile-flow phantom validation of MOG PC-MRI for fetal flow volumes and heart rates, and measurements in human fetuses in a second center. Flow by MOG agrees with timer/beaker and gated flow quantification, and gives pulsatile fetal flow curves in a second center, suggesting MOG PC-MRI as a reliable tool for fetal flow quantification in more centers.

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