CT
Axial C+ arterial phase
Coronal C+ arterial phase
Occlusion throughout the partially imaged cervical and intracranial portions of the right vertebral artery with a small amount filling distally. No right PICA opacification.
The imaged left vertebral artery and basilar arteries are patent. The circle of Willis and major branches are otherwise patent. Incidental ACA trifurcation (normal variant).