 The intracranial internal carotid arteries are normal in course and caliber. The middle and anterior cerebral arteries are unremarkable. There is a small right posterior communicating artery. There is a small left P1 segment with predominantly fetal origin of the left PCA. There is dominant right vertebral artery. The vertebral arteries and basilar arteries are normal in course and caliber. There is no evidence of flow-limiting stenosis or aneurysm.
1. No significant stenosis of the intracranial arterial circulation. No evidence of aneurysm. 2. No evidence of venous sinus thrombosis.