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Large area of increased Tmax and mean transit time (MTT) is noted in the left MCA territory, without a significant ischaemic core.
Conventional aortic arch branching morphology.
Thickening of the wall of the aortic arch, brachiocephalic trunk, bilateral common carotid and subclavian arteries.
There is high grade stenosis of bilateral common carotid arteries, with thread-like opacification of lumen.
The very distal portions of the common carotid arteries are reconstituted, with normal calibre and opacification of the internal carotid arteries bilaterally.
The right vertebral artery origin and proximal portions are not visualised.
There is abrupt reconstitution of the right vertebral artery at the level C3 transverse foramen.
The rest of the extra and intracranial right vertebral artery is slightly irregular.
Left dominant vertebral artery.
There is attenuated opacification of the distal left M1 and proximal segments of the superior and inferior M2 divisions consistent with embolic occlusion, however, distally, the M2 segments opacify normally.
Aortic arch injection shows occlusion of Left CCA, string like stenosis of the innominate, right subclavian and common carotid arteries, and a dominant left vertebral artery just distal to critical stenosis of the left subclavian artery.