Abstract #2190

Comparison of ECG and Novel Ultrasound Triggering with Spatially Resolved MR-compatible Doppler for Cardio-vascular MRI.

Lindsey Alexandra Crowe¹, Gibran Manasseh¹, Aneta Chmielewski², Thomas de Perrot¹, Hajo Müller³, Rares Salomir¹, and Jean-Paul Vallée¹

¹Division of Radiology, Faculty of Medicine, Geneva University Hospital, Geneva, Switzerland, ²University of Toronto, Hospital for Sick Children, Toronto, ON, Canada, ³Division of Cardiology, Geneva University Hospital, Geneva, Switzerland

A new cardiac MRI triggering method is sought for cases of ECG signal complications due to pathology, or for fetal imaging. We propose feasibility of triggering to carotid ultrasound using an MRI compatible probe using spatially resolved Doppler compared to gold standard ECG. Retrospective processing using Metric Optimized Gating (MOG), is also included for comparison. Imaging modalities were compatible and the positioning of the US probe stable and patient friendly. Phase contrast flow and cine images were successfully obtained in healthy volunteers with ECG, Doppler triggering and MOG. Image quality is highly comparable and accurate functional parameters accessible.

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