Abstract #2944

Quantitative phase-contrast CMR of blood flow in fetal vessels gated by Doppler ultrasound: comparison with metric optimized gating

Erik Hedström^1,2, Katarina Steding-Ehrenborg^1,3, Sebastian Bidhult^1,4, Christian Ruprecht^5,6, Fabian Kording^5,6, and Anthony H Aletras^1,7

¹Lund University, Skåne University Hospital, Department of Clinical Sciences Lund, Clinical Physiology, Lund, Sweden, ²Lund University, Skåne University Hospital, Department of Clinical Sciences Lund, Diagnostic Radiology, Lund, Sweden, ³Lund University, Department of Health Sciences, Physiotherapy, Lund, Sweden, ⁴Lund University, Department of Biomedical Engineering, Faculty of Engineering, Lund, Sweden, ⁵Department of Diagnostic and Interventional Radiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany, ⁶northh medical GmbH, Martinistraße 52, 20246, Hamburg, Germany, ⁷Laboratory of Computing, Medical Informatics and Biomedical – Imaging Technologies, Aristotle University of Thessaloniki, School of Medicine, Thessaloniki, Greece

The recent Doppler UltraSound (DUS) triggering method, which utilizes an MR-compatible ultrasound device to assess fetal heart contractions to provide a triggering/gating signal may improve fetal quantitative flow assessment by phase-contrast CMR. We evaluated the DUS method for blood flow measurements in the fetal descending aorta and umbilical vein, in comparison with the metric optimized gating method. Fetal quantitative blood flow by phase-contrast CMR is feasible using the DUS method. This further increases usability of fetal CMR, as post-processing is not needed.

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