Head CT and/or brain MRI are important studies to visualize infarctions and brain hemorrhages.
CT can show dilation of the sulci accompanies by focal ventricular enlargement.
MRI has higher sensitivity for detecting ischemic regions.
Magnetic Resonance Angiographic studies can demonstrate occlusions within the circle of Willis and better visualize the collateral vasculature. It is preferred over CTA in most institutions.
Moyamoya
Hemorrhagic stroke/Ischemic stroke
Cerebellar stroke
Giant cell arteritis, vasculitis
Multiple sclerosis
Head trauma
Normal pressure hydrocephalus
Basilar artery thrombosis