headache. There is no evidence of acute ischemic or hemorrhagic lesion on this scan.Significant metallic artifacts with surrounding parenchymal signal loss on the genu of corpus callosum indicating prior pericallosal artery aneurysm clipping status. The ventricles, sulci and cisterns are symmetric and unremarkable. There is no mass, mass effect, edema, midline shift, intra or extra-axial fluid collection/hemorrhage, restricted diffusion/acute ischemia, or abnormal contrast enhancement. The midline structures and cranial-cervical junction are normal. Normal flow voids are identified in the major intracranial vessels. The paranasal sinuses and mastoid air cells are clear.3D time of flight MOTSA MRA brain images with maximum intensity projections of the anterior/posterior intracranial circulation demonstrate signal loss from the level of right ACA pericallosal artery due to surgical clip related artifacts, otherwise normal ICAs, MCAs and ACAs. Vertebrobasilar system appears to be normal.
1. No evidence of acute ischemic or hemorrhagic lesion on this scan.2. Significant metallic artifacts on the area of pericallosal artery clipping.3. Segmental non visualization of ACA around the area of surgical clip, otherwise no remarkable brain MRA. 