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 Bustin^1,2, Jérôme Yerly^1,3, John Heerfordt^1,4, Davide Piccini^1,4, Matthias Stuber^1,3, 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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