Multi-phase coronary magnetic resonance angiography using a 3D cones trajectory
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KeywordsRight Coronary Artery Cardiac Phasis Coronary Magnetic Resonance Angiography Coronary Magnetic Resonance Navigator Gating
3D whole-heart free-breathing coronary MRA simplifies prescription effort, requires less patient cooperation, and supports retrospective reformats at arbitrary planes. However, this technique can require long scan times and must account for respiratory and cardiac motion.
The 3D cones whole-heart free-breathing coronary MRA technique reduces scan time and improves robustness to motion. 2D navigator images directly measure respiratory motion of the heart and provide robust motion correction even without navigator gating. Multiple resolved cardiac phases provide robustness to the initial choice of TD and subsequent heart-rate variations. Additional cardiac phases can be acquired to optimize the visualization of the left and right coronary trees, which may have different quiescent periods.
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