 MRI BRAIN:There are no T2/FLAIR abnormalities. There is normal ventricular size with no midline shift. Basal cisterns are patent. There are no diffusion or susceptibility abnormalities. Basal cisterns are patent.There is no evidence of hemorrhage, mass effect, or edema.There are multiple small signal voids in the inferior-anterior aspect of the vermis, most likely related to bilateral PICA flow related signal voids. However, dural arteriovenous fistula cannot be excluded.MRA BRAIN:The internal carotid arteries are patent. The anterior, middle, posterior cerebral arteries are patent with no evidence of significant stenosis or aneurysm. The basilar and vertebral arteries are patent.The anterior communicating artery and the bilateral posterior communicating arteries are patent.
1. Unremarkable MRI of the brain.2. There are small signal voids in the inferior-anterior aspect of the vermis, most likely related to bilateral PICA flow related signal voids. However, dural arteriovenous fistula cannot be excluded. Definitive diagnosis of dural arteriovenous fistula is done by angiogram; however, CTA would be recommended as a noninvasive procedure.3. Normal anterior and posterior cerebral circulation with no evidence of significant stenosis or aneurysm.