There is occlusion of the right middle cerebral artery proximal M1 segment, TICI 0.
A significant amount of the right MCA territory is filled from right ACA collaterals. The right posterior communicating artery is present.
Post mechanical thrombectomy angiography shows revascularization of the right MCA territory however there is a persistent partially occlusive thrombus at the right MCA bifurcation extending into the inferior division resulting in delayed filling of the territory with some retrograde filling supplied by the right ACA collaterals, TICI 2B.
Final angiography again demonstrates full filling of the right MCA territory however with some sluggish and collateral flow, TICI 2B.