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
Center for Magnetic Resonance Research,
Department of Radiology, University of Minnesota,
Minneapolis, MN, United States,
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
effect due to the increased r2
7T, and maximized enhancement of T1 contrast for CMRA.
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