CT - Cerebral angiography
Dolichoectasia of V4 segment of left vertebral and basilar artery with irregular areas of dilatation.
Partially thrombosed ectatic segment of the V4 segment of left vertebral artery.
Irregular fusiform dilatation of the terminal portion of the right internal carotid artery, M1 segment of right MCA and proximal portion of A1 segment of right ACA.
Absent A1 of the left ACA is noted with rest of the bilateral ACA segments arising from right A1 segment.
Hypoplastic right vertebral artery.