CT/CTA
CT delineates acute hemorrhage, CTA to show abnormal vasculature
MRI/MRA
Vessels appear as abnormal flow voids
Both better than CT for visualizing structures in relation to AVM
Angiography
Gold standard to evaluate the architecture including arterial feeding, venous drainage, and AVM-associated aneurysms
CT delineates acute hemorrhage, CTA to show abnormal vasculature
Vessels appear as abnormal flow voids
Both better than CT for visualizing structures in relation to AVM
Gold standard to evaluate the architecture including arterial feeding, venous drainage, and AVM-associated aneurysms
Arteriovenous malformation 
Venous angioma
Cerebral venous thrombosis
Cavernous malformation
Coma
Capillary telangiectasia
Brain abscess
Intracranial hemorrhage