Reason: History of ischemic stroke. There is a small, focal area of signal abnormality centered within the posterior aspect of the left putamen extending into the adjacent left frontal deep white matter which demonstrates increased T2 signal, mixed T1 signal, increased signal on diffusion-weighted images, and isointense signal on ADC images compatible with a subacute infarction. This area corresponds to the hypodensity described on recent CT. The remaining brain parenchyma appears within normal limits for age. The ventricles and sulci are within normal limits. The basal cisterns remain patent. There is no midline shift or mass effect. No extra-axial fluid collection is identified. Normal flow-voids are demonstrated in the major intracranial vascular structures. The midline structures and craniocervical junction are within normal limits. There is mild mucosal thickening within the maxillary sinuses. The orbits, skull, and scalp soft tissues are grossly unremarkable.
Subacute infarct involving the left putamen and adjacent deep white matter which was also present on recent CT from 7/20/2016.