Extensive, albeit subtle, cortical restricted diffusion involves large areas of the cerebral cortex, predominantly in the left cerebral hemisphere involving all lobes, while cortical restricted diffusion is also seen in the medial right occipital, right parietal lobe, and right inferior temporal lobe. There is unequivocal mild restricted diffusion involving the caudate head and lentiform nucleus bilaterally. The involved regions also demonstrate extremely subtle FLAIR hyperintensity. No further abnormality is identified, with no intracranial mass or abnormal region of contrast enhancement and no T2/FLAIR signal abnormality is identified. No hydrocephalus and no extra-axial collections. The intracranial arterial vasculature is unremarkable.