Abstract #0780

Highly Efficient Nonrigid Motion Corrected 3D Whole-Heart Coronary Vessel Lumen and Wall Imaging

Gastao Cruz¹, David Atkinson², Markus Henningsson¹, René Botnar¹, and Claudia Prieto¹

¹Division of Imaging Sciences & Biomedical Engineering, King's College London, London, United Kingdom, ²University College London, London, United Kingdom

Non-invasive visualization of both coronary lumen and vessel wall is desired for assessment of coronary atherosclerosis. An interleaved acquisition was recently proposed to obtain both 3D images with MRI. However, this approach is susceptible to motion artifacts and dual respiratory gating results in long and unpredictable scan times. Here, we propose a ~100% scan efficiency, two-step motion correction method using translational and nonrigid correction to produce co-registered coronary lumen and vessel wall images. The proposed method shows significant improvements over translational correction and similar lumen quality to a reference navigator-gated (6mm) scan, despite a scan time reduction of ~1.8x.

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