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Abstract #2156

Optimized Stack-of-Stars QISS MR Angiography for Near-Isotropic Non-Contrast Evaluation of the Renal and Peripheral Arteries

Robert R Edelman1,2, Jianing Pang3, and Ioannis Koktzoglou1,4
1Radiology, NorthShore University HealthSystem, Evanston, IL, United States, 2Radiology, Feinberg School of Medicine, Northwestern University, Chicago, IL, United States, 3Siemens Medical Solutions USA, Chicago, IL, United States, 4Pritzker School of Medicine, University of Chicago, Chicago, IL, United States

Quiescent-interval slice-selective (QISS) MRA has become established as a simple “push button” nonenhanced alternative to CTA and contrast-enhanced MRA. However, a fundamental drawback of QISS as currently implemented is that it uses a 2D acquisition strategy. The inability to acquire very thin slices along with the non-rectangular slice profile predisposes QISS to artifacts from partial volume averaging and blurring of multiplanar reconstructions. We therefore implemented and optimized a novel thin-slab stack-of-stars QISS (tsSOS-QISS) technique to provide near-isotropic high spatial resolution that rivals CTA, while maintaining the excellent arterial conspicuity, motion insensitivity and breath-hold capability of 2D QISS.

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