Fig. 4.

A 53-year-old man (A, B) and a 63-year-old man (C, D) show the typical 'soft high density' lesions with different outcomes.

A. The non-contrast CT obtained immediately after successful recanalization of the occluded right middle cerebral artery shows a focal high density lesion without contour bulging at the posterior portion of the right lentiform nucleus.

B. The high density is gone on the CT obtained the following day.

C. The non-contrast CT obtained immediately after failed recanalization of the left carotid T lesion shows a focal high density area in the left putamen.

D. Massive hemorrhagic transformation is noted on the CT obtained the next day.