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Abstract #3814

Cartesian Whole-Heart Coronary MRA Using Interleaved Auxiliary Image Acquisition and 3D Affine Motion Correction

Markus Henningsson1, Claudia Prieto1, Rene M. Botnar1

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

We developed a novel respiratory motion correction technique for Cartesian whole-heart coronary MRA (CMRA) using 3D affine transformation which allows for data acquisition with 100% efficiency. Fully sampled, low resolution auxiliary images are acquired for different respiratory bins, interleaved with high resolution CMRA images. Correction is performed in image space by registering each auxiliary image (bin 2-4) to the end-expiratory image (bin1), thereafter applying the calculated transformation to the corresponding CMRA images which have been similarly binned. The proposed method, with 100% gating efficiency, shows comparable image quality to a 7mm gated scan with 1D FH correction (average gating efficiency=55%).