FIG 2. EPI-GRE T2*-weighted sequence as the only positive technique for the 24-hour detection of post-thrombolytic petechial hemorrhage in an 86-year-old man admitted 24 hours previously and treated with 58 mg r-tPA IV 110 minutes after the onset of a left hemiplegia (NIH stroke score on admission, 13).

A, CT scan, showing a large acute hypoattenuated area within the MCA territory without sign of fresh blood extravasation.

B, FSE-FLAIR image, showing uniform hyperintensity within the ischemic area without hypointense hemorrhagic focus.

C, EPI-SE T2-weighted image, showing similar findings of positivity for ischemia and negativity for HT as in previous 3B image.

D, EPI-GRE T2*-weighted image, showing hypointense susceptibility artifact within both putamen and globus pallidus, revealing confluent petechiae. The extravasation was rated "HI2."