<s>[INST] Hello doctor, I am looking for a detailed read and interpretation of the MRA. Please be as detailed as possible with any abnormal findings you may see. My symptoms are progressive vision loss in the right eye, temporal headaches, and tenderness on the right side, headache on back of the head (right side), scissoring reflex via retinoscopy. I have attached my files. [/INST] Hello. I have seen your reports. (attachment removed to protect patient identity).  MR arteriogram shows The intracranial parts of both internal carotid arteries appear normal in caliber. There is hypolplasia of the A1 segment of the right anterior cerebral artery. The proximal left anterior and bilateral middle cerebral arteries and the arteries of the circle of Willis are normal in caliber. The right posterior cerebral artery is hypoplastic. The vertebral, basilar and left posterior cerebral arteries and their branches appear normal. No aneurysm or dissection or vascular malformation. There is no obvious vascular looping around the bilateral trigeminal nerves in the cisternal parts in the given images. </s>