Abstract #0915

Lipid-insensitive 4D motion-resolved free breathing coronary MRA in heart transplant recipients at 3T

Jessica A.M. Bastiaansen¹, Lorenzo Di Sopra¹, Giulia Ginami², Hugues Vinzant¹, Juan F Iglesias³, Sophie Degrauwe³, Samuel Rotman³, Davide Piccini^1,4, Ruud B Van Heeswijk^1,5, Roger Hullin³, Jérôme Yerly^1,5, and Matthias Stuber^1,5

¹Department of Radiology, University Hospital (CHUV) and University of Lausanne (UNIL), Lausanne, Switzerland, ²School of Biomedical Engineering and Imaging Sciences, King’s College London, Lausanne, Switzerland, ³Cardiology Service, Lausanne University Hospital (CHUV), Lausanne, Switzerland, ⁴Advanced Clinical Imaging Technology, Siemens Healthcare AG, Lausanne, Switzerland, ⁵Center for Biomedical Imaging, Lausanne University Hospital (CHUV), Lausanne, Switzerland

The purpose of this study was to investigate coronary magnetic resonance angiography (MRA) at 3T as a possible alternative to invasive X-ray coronary angiography for the visualization of proximal and mid segments of the coronary arterial system in heart transplant recipients. Therefore, a lipid-insensitive binomial off-resonance excitation (LIBRE) pulse was optimized and combined with a 3D radial whole-heart sequence. Respiratory-self-navigated MRA was performed at 3T in heart transplant recipients during and after Gd infusion, and was compared with respiratory-motion compensation using compressed sensing (CS) to define the preferred acquisition and reconstruction protocol in this patient group.

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