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Abstract #2677

Respiratory Self-Navigated Inversion Recovery GRE Whole-Heart Coronary MR Imaging Using an Intravascular Contrast Agent in a Pediatric Population

Davide Piccini 1,2 , Gary R. McNeal 3 , W. James Parks 4,5 , Michael O. Zenge 6 , and Tim C. Slesnick 4,5

1 Advanced Clinical Imaging Technology, Siemens Healthcare, Lausanne, Switzerland, 2 Department of Radiology, University Hospital (CHUV) and University of Lausanne (UNIL) / Center for Biomedical Imaging (CIBM), Lausanne, Switzerland, 3 Customer Solutions Group, Siemens Medical Solutions USA, Inc, Malvern, PA, United States, 4 Department of Pediatrics, Emory University, Atlanta, GA, United States, 5 Children's Healthcare of Atlanta, Atlanta, GA, United States, 6 MR Product Innovation and Definition, Siemens AG, Healthcare Sector, Erlangen, Germany

Free-breathing coronary MRI in pediatric patients is a valuable radiation-free alternative to coronary CT. Although navigator-gated inversion-recovery gradient echo (NAV IR GRE) imaging after administration of blood pool contrast agents has shown some advantages, compared to T2-prepared bSSFP imaging, unpredictable acquisition times and low scan efficiency due to respiratory gating remain a problem. In this work 3D radial whole-heart coronary MRI with respiratory self-navigation was adapted to IR GRE imaging. After protocol optimization, this approach was compared to NAV IR GRE in a first pediatric patient population. Equivalent vessel quality, sharpness and length were achieved with highly predicable scan times.

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