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Abstract #2573

Breath-hold coronary MR angiography:  comparison of flow-dependent QISS with flow-independent T2-prepared 2D balanced steady-state free precession

Robert R. Edelman1,2, Marcos Paulo Botelho1, Amit Pursnani1, Shivraman Giri3, and Ioannis Koktzoglou1,4

1Radiology, NorthShore University HealthSystem, Evanston, IL, United States, 2Radiology, Feinberg School of Medicine, Northwestern Univesity, Chicago, IL, United States, 3Siemens Healthcare, Chicago, IL, United States, 4Radiology, University of Chicago Pritzker School of Medicine, Chicago, IL, United States

Radial quiescent-interval slice-selective (QISS) is flow-dependent due to the application of an in-plane FOCI inversion pulse, whereas radial 2D T2-prepared bSSFP is essentially flow-independent. Both techniques show promise as efficient breath-hold alternatives to standard-of-care free-breathing 3D techniques for coronary MR angiography. Comparison of radial QISS with T2-prepared radial bSSFP was performed in healthy subjects and patients with coronary artery disease (CAD). Although the appearance of the coronary arteries in healthy subjects was similar using flow-dependent QISS and flow-independent T2-prepared 2D bSSFP, aside from increased pericardial fluid signal and streak artifact with the latter technique, the appearance diverged in severe CAD.

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