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Abstract #2680

Contrast Enhanced Self-Gated Coronary Angiography at 7 Tesla Using Ultra-Short Echo Time Imaging

Naoharu Kobayashi 1 , Jianing Pang 2 , Steen Moeller 1 , Pierre-Francois van de Moortele 1 , Sebastian Schmitter 1 , Kamil Ugurbil 1 , Debiao Li 2 , Michael Garwood 1 , and Gregory J Metzger 1

1 Center for Magnetic Resonance Research, Department of Radiology, University of Minnesota, Minneapolis, MN, United States, 2 Biomedical Imaging Research Institute, Cedars-Sinai Medical Center, Los Angeles, CA, United States

We investigated the feasibility of using an ultra-short TE (UTE) imaging method combined with the benefits of self-gating to perform contrast enhanced CMRA applications at 7T. Self-gating was performed by PCA on the center k-space point from each acquired profile and validated by comparing with physiological monitoring. The self-gating accurately detected respiratory and cardiac motion. Reconstruction with high temporal resolution captured an initial first pass signal increase after contrast administration. Extremely short TE in UTE diminished the T2 * shortening effect due to the increased r2 * at 7T, and maximized enhancement of T1 contrast for CMRA.

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