Abstract #2223

Free-breathing Whole-heart Magnetic Resonance Angiography with Self-gated Radial Phyllotaxis Trajectory

Wai-Yan Ryana Fok^1,2,3, Andrew J. Powell^1,2, and Mehdi H. Moghari^1,2

¹Cardiology, Boston Children's Hospital, Boston, MA, United States, ²Pediatrics, Harvard Medical School, Boston, MA, United States, ³Informatics, Technical University of Munich, Garching, Germany

Whole-heart magnetic resonance angiography is commonly performed with diaphragmatic navigator gating to compensate for respiratory motion, but this approach is inefficient as data must be reacquired when it is outside the acceptance window. We therefore developed and validated a self-gated respiratory motion compensation technique based on a radial phyllotaxis k-space trajectory in which all data are accepted throughout the respiratory cycle.

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