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. Edelman^1,2, Marcos Paulo Botelho¹, Amit Pursnani¹, Shivraman Giri³, and Ioannis Koktzoglou^1,4

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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