T1 fat sat images demonstrate increased signal in the left internal carotid artery from the level of the bifurcation to the cavernous ICA. Superior to the bifurcation, there is a flow void demonstrated extending superiorly which represents a narrowed patent lumen with a prominent high T1 signal crescent in the wall of the carotid artery. The narrow calibre of the lumen extends to the supraclinoid portion.
There is no evidence of high signal within the sulci or ventricular system on the FLAIR or T1 weighted imaging to suggest subarachnoid haemorrhage. No intra or extra axial collection, mass, or region of restricted diffusion identified.