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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