Coronary MRA performed using respiratory self-navigation techniques that apply retrospective motion-correction suffer from artifacts originating from static anatomical structures surrounding the heart. This becomes even more complicated at 3T due to insufficient fat suppression. Here we implemented free-breathing self-navigated 3D coronary MRA at 3T. Instead of using a motion model, we resolved the motion using 4D k-t sparse SENSE. Resulting images were then quantitatively compared with those reconstructed from the same datasets but using a 1D motion correction. We demonstrate that non-contrast whole-heart coronary MRA can be performed at 3T and that 4D motion-resolved reconstruction effectively minimizes adverse effects of respiratory-motion.
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