Abstract #2687

Dual-phase coronary MR angiography using image based respiratory navigation

Markus Henningsson¹ and Rene Botnar¹

¹Imaging Sciences and Biomedical Engineering, King's College London, London, United Kingdom

Image-based navigation (iNAV) is a promising respiratory motion correction approach for coronary MR angiography (CMRA). However, for dual-phase CMRA the technique may fail due to the different cardiac motion states of the systolic and diastolic acquisition. Here we propose the use of separate independent systolic and diastolic iNAV acquisitions to address this issue. We compared iNAV to the conventional diaphragmatic one-dimensional navigator (1D NAV) in 8 healthy subjects. The proposed technique achieves similar or improved coronary vessel sharpness compared to 1D NAV while reducing dual-phase CMRA acquisition time.

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