Dementia: Altered mental status, hallucinations. Many of the images are degraded by patient motion. There are bilateral cerebral convexity subdural cerebrospinal fluid signal collections, which measure up to 10 mm in thickness on each side. There is sulcal T2 hyperintensity in the posterior cerebral hemisphere, which corresponds to the subarachnoid hemorrhage demonstrated on the prior CT. There are also small right frontal lobe paramedial intraparenchymal hemorrhages. There are also several small areas of apparent restricted diffusion, including in the body of the corpus callosum, bilateral cingulate gyri, and left inferior frontal lobe deep white matter, at least some of which appear to be distinct from the areas of hemorrhage. Otherwise, there is mild scattered cerebral white matter T2 hyperintensity without restricted diffusion, which may represent chronic small vessel ischemic disease. There is no midline shift. The skull and orbits appear to be unremarkable.
1. Bilateral cerebral convexity subdural cerebrospinal fluid signal collections, which measure up to 10 mm in thickness on each side. 2. Sulcal T2 hyperintensity in the posterior cerebral hemisphere corresponds to the subarachnoid hemorrhage demonstrated on the prior CT. 3. Small right frontal lobe paramedial intraparenchymal hemorrhages.4. Several small areas of apparent restricted diffusion, including in the body of the corpus callosum, bilateral cingulate gyri, and left inferior frontal lobe deep white matter, at least some of which appear to be distinct from the areas of hemorrhage, may represent acute infarcts in the anterior cerebral artery distribution. However, precise assessment is limited by patient motion.