Hemorrhagic transformation of ischemic infarction

Noncontrast head CT (A) shows heterogeneous hyperdensity within hypodense region involving right frontal and insular lobes. On subsequent MRI of the brain, FLAIR (B), T2* gradient recall echo (C), and DWI (D) sequences show hypointense ICH (thin arrows) and hyperintensities consistent with acute infarction in the distribution of the right middle cerebral artery (thick arrows).