Abstract #1419

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

Farah Al-Rawi¹, Elena Trajcevska¹, Dinesh Gooneratne¹, Windell Ang¹, Yuliya Perchyonok^1,2, Greg Fitt¹, Andrew Kemp¹, Shivraman Giri³, Davide Piccini⁴, Amy Brodtmann⁵, Helen Dewey⁶, Ioannis Koktzoglou⁷, and Ruth P Lim^1,2

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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