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Abstract #0877

Quiet, Dual-Contrast Ultra-Short Echo Time MRA of the Extracranial Carotid Arteries

Ioannis Koktzoglou 1,2 , Ian G Murphy 1,3 , David Grodzki 4 , Shivraman Giri 5 , and Robert R Edelman 1,3

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

Magnetic resonance angiography (MRA) is an accurate diagnostic modality for evaluating stenotic disease of the extracranial carotid arteries. For patients in whom the administration of gadolinium-based contrast agents is contraindicated, time-of-flight MRA is commonly used. However, image quality is variable and only a limited vascular region is depicted. We describe an alternative approach for non-contrast MRA using ultra-short echo time 3D point-wise encoding time reduction with radial acquisition (PETRA) sequence that allows for evaluation of the carotid arteries using both bright- and dark-blood projection images, and eliminates signal loss near severe stenoses.

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