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Abstract #2683

MRI of peripheral vascular calcifications using stack-of-stars 3D FLASH

Marcos Paulo Botelho1, Shivraman Giri2, Ioannis Koktzoglou1,3, Alto Stemmer4, and Robert R. Edelman1,5

1Radiology, NorthShore University HealthSystem, Evanston, IL, United States, 2Siemens Healthcare, Chicago, IL, United States, 3Radiology, University of Chicago Pritzker School of Medicine, Chicago, IL, United States, 4Siemens Healthcare GmbH, Erlangen, Germany, 5Radiology, Feinberg School of Medicine, Northwestern Univesity, Chicago, IL, United States

We evaluated a novel approach for visualizing and quantifying peripheral arterial calcifications using a stack-of-stars 3D FLASH pulse sequence. The technique permitted isotropic 1mm3 spatial resolution and displayed dark calcifications against a relatively uniform bright background. Banding artifacts relating to chemical shift were minimized by the use of radial in-plane spatial encoding and an in-phase echo time, while vascular signal was enhanced by the use of a low flip angle near the Ernst angle of blood. In patients with peripheral arterial disease, there was excellent correlation using CT angiography as the standard of reference.

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