59-year-old male unresponsive off sedation status post CABG with history of polio. Large, well circumscribed focus of CSF density fluid with adjacent bony remodeling without significant mass effect occupying most of the left hemisphere may be suggestive arachnoid cyst.Multiple, nonspecific areas of low density in the right internal capsule, right basal ganglia and right temporal cortex consistent with acute ischemia. MRI is recommended for further evaluation if clinically warranted.The ventricles and basal cisterns are normal in size and configuration.The calvaria and skull base are radiographically normal. The visualized paranasal sinuses and mastoid air cells are normally pneumatized.
Acute right hemisphere stroke as described above.