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Abstract #0188

Focused navigation (fNAV) for cardiac and respiratory motion-compensated free-running 3D whole-heart coronary MRA

Giulia MC Rossi1, Nemanja Masala1, Jessica AM Bastiaansen1, Aurelien Bustin1,2, Jérôme Yerly1,3, John Heerfordt1,4, Davide Piccini1,4, Matthias Stuber1,3, and Christopher W Roy1
1Department of Radiology, Lausanne University Hospital (CHUV) and University of Lausanne (UNIL), Lausanne, Switzerland, 2LIRYC (Electrophysiology and Heart Modeling Institute), Bordeaux, France, 3CIBM Center for Biomedical Imaging, Lausanne, Switzerland, 4Advanced Clinical Imaging Technology (ACIT), Siemens Healthcare AG, Lausanne, Switzerland

A novel method for reconstructing motion-compensated 3D CMRA images from free-running data is proposed. We extend the use of a recent method for non-rigid respiratory motion correction called focused navigation (fNAV) to also encompass cardiac motion compensation that accounts for beat-to-beat heart-rate variability. Our combined fNAV approach is compared to the previously established cardiac and respiratory motion-resolved 5D imaging in vivo and is shown to provide overall similar image quality and comparable right coronary artery visualizations to 5D imaging in significantly shorter reconstruction times.

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