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Abstract #1156

Multi-Phase 3D Cones Coronary MRA with 3D Respiratory Motion Compensation

Holden H. Wu1, 2, Bob S. Hu2, 3, Dwight G. Nishimura2, Michael V. McConnell1, 2

1Cardiovascular Medicine, Stanford University, Stanford, CA, United States; 2Electrical Engineering, Stanford University, Stanford, CA, United States; 3Palo Alto Medical Foundation, Palo Alto, CA, United States

Non-invasive coronary angiography is one of the most desired applications of cardiovascular MRI, but is challenged by physiologic motion. In this work, we present new advances in respiratory motion compensation for the 3D cones multi-phase whole-heart imaging technique. Leading and trailing 2D navigator images are acquired every heartbeat in orthogonal planes through the heart to directly track respiration-induced displacement in all three directions (S/I, A/P, L/R). Tracking results are then used to retrospectively compensate all readouts (100% acquisition efficiency) prior to image reconstruction.