Abstract #1068

Time-Resolved Non-Contrast-Enhanced MR Angiography with Static Tissue Suppression using Velocity-Selective Pulse Trains

Qin Qin^1,2, Guanshu Liu^1,2, Ye Qiao¹, and Dexiang Liu^1,2,3

¹Radiology, Johns Hopkins University, Baltimore, MD, United States, ²F.M. Kirby Research Center for Functional Brain Imaging, Kennedy Krieger Institute, Baltimore, MD, United States, ³Radiology, Panyu District Central Hospital, Guangzhou, China, People's Republic of

Time-resolved non-contrast-enhanced MR angiography (NCE-MRA), by providing hemodynamic flow patterns, is promising for many vascular disorders. Conventional techniques remove tissue background using various arterial spin labeling (ASL) approaches with paired subtraction of control and label scans. Here a new multi-phase MRA method is introduced that achieves background suppresstion by applying a tissue mask, which is derived from thresholding a velocity-selective MRA (VSMRA) obtained at the end of the cycle. The feasibility of this new single-scan dynamic approach was demonstrated on extracranial and intracranial vasculatures of healthy volunteers at 3T.

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