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Abstract #0744

Highly Accelerated Dynamic 2D and 3D Vessel-Encoded Arterial Spin Labelling Angiography

S. Sophie Schauman1, Mark Chiew1, and Thomas W. Okell1

1Nuffield Department of Clinical Neurosciences, University of Oxford, Oxford, United Kingdom

Vessel-encoded ASL can produce vessel-selective cerebral angiograms, but to separate blood from multiple arteries more images are needed than for standard ASL angiography, which increases scan time. Angiograms are however well suited for under-sampling and compressed sensing reconstruction because of their high intrinsic sparsity. In this work we demonstrate in-vivo that vessel-selective angiograms allow for higher acceleration factors, yielding comparable image quality to conventional angiography with matched scan time using 2D and 3D time-resolved golden angle radial acquisitions. With this optimised acquisition and reconstruction method, scan time of the 3D case can be reduced from 8:35 hours to ~5 minutes.

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