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Abstract #3135

Free-breathing non-contrast 3D radial respiratory motion-resolved versus motion-corrected whole-heart coronary MRA at 3T

Jessica AM Bastiaansen1, Lorenzo di Sopra1, Jérôme Yerly1,2, Davide Piccini3, Ruud B van Heeswijk1, and Matthias Stuber1,2

1Department of Radiology, Hospital Lausanne (CHUV) and University of Lausanne (UNIL), Lausanne, Switzerland, 2Center for Biomedical Imaging, Lausanne, Switzerland, 3Advanced Clinical Imaging Technology, Siemens Healthcare AG, Lausanne, Switzerland

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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