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Abstract #2146

Breath-holding and free-breathing radial-based acquisition strategies for non-contrast MR angiography of the pulmonary veins

Pascale Aouad1, Ioannis Koktzoglou2, and Robert Edelman2
1Northwestern University, Chicago, IL, United States, 2Northshore University Healthsystem, chicago, IL, United States

CTA and contrast-enhanced MRA (CEMRA) are routinely used to evaluate vascular anatomy prior to pulmonary vein isolation for atrial fibrillation. As potential non-contrast alternatives, we evaluated three radial techniques (breath-hold 2D radial and stack-of-stars (SOS); free-breathing nonselective SOS). 24 patients were studied using CTA as reference standard. Consistently good image quality was obtained with all three radial techniques. There was good-to-excellent agreement with CTA on breath-holding and free-breathing SOS MRA for PV ostial diameters. Our results indicate that radial MRA may provide a useful non-contrast alternative to CTA and CEMRA, with the flexibility of allowing either breath-holding or free-breathing acquisitions.

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