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Abstract #1419

Non-Contrast Hybrid Arterial Spin Labeled (NoHASL) Imaging of the Intracranial Arteries

Farah Al-Rawi1, Elena Trajcevska1, Dinesh Gooneratne1, Windell Ang1, Yuliya Perchyonok1,2, Greg Fitt1, Andrew Kemp1, Shivraman Giri3, Davide Piccini4, Amy Brodtmann5, Helen Dewey6, Ioannis Koktzoglou7, and Ruth P Lim1,2

1Radiology, Austin Health, Melbourne, Australia, 2The University of Melbourne, Melbourne, Australia, 3Siemens Healthcare, Chicago, IL, United States, 4Siemens Healthcare, Lausanne, Switzerland, 5Neurology, Austin Health, Melbourne, Australia, 6Neurology, Eastern Health, Melbourne, Australia, 7Radiology, NorthShore University HealthSystem, Evanston, IL, United States

A Non-enhanced Hybrid Arterial Spin Labeling MRA (NoHASL) technique for assessment of the intracranial arteries was evaluated. 30 patients with known/suspected cerebral ischemia underwent time of flight MRA (TOF), NoHASL, and contrast enhanced MRA (CE-MRA). 21 arterial segments per patient were assessed by 2 neuroradiologists for image quality and haemodynamically significant stenosis. Overall image quality scores were diagnostic for all three sequences, with NoHASL and CE-MRA performing better for proximal intracranial segments, and TOF MRA performing better for smaller caliber arteries.

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