FIG 2. Reversal of DWI-hyperintense lesion after thrombolysis in a 68-year-old man with right-sided weakness and dysarthria. The patient had a left MCA occlusion that was successfully treated with IA tissue plasminogen activator at 6 hours. Initial DWI (row 1) and ADC (row 2) images demonstrate abnormality involving the left basal ganglia, insula, and subinsular region (short arrows) and in the left corona radiata (long arrow). At 3 days, follow-up (F/U) T2-weighted images demonstrate no abnormality in the left corona radiata. Lesions in the basal ganglia, insula, and subinsular region are unchanged. At discharge, the right-sided weakness had resolved.