Imaging findings in patients with and without hemorrhagic transformation after IA reperfusion therapy
| Hemorrhagic Transformation | No Hemorrhagic Transformation | P Value | |
|---|---|---|---|
| CTA-SI (prospective segmentation) | |||
| Total lesion volume (ml) | 51.5 | 30.8 | .20 |
| Single slice lesion volume on slice containing core (ml) | 2.5 | 2.0 | .46 |
| Core lesion volume (ml) | 0.24 | 0.32 | .06 |
| Single slice lesion mean ΔHU (HU) (normal tissue HU − single slice lesion HU on single slice containing core) | 3.6 | 3.2 | .63 |
| Core Mean ΔHU (HU) (normal tissue HU − core lesion HU) | 9.0 | 6.3 | .006 |
| Unenhanced CT (post hoc segmentation) | |||
| Single slice lesion mean ΔHU (normal tissue HU − single slice lesion HU on single slice containing core) (HU) | 5.8 | 3.3 | .02 |
Note.—CT indicates computed tomography; CTA-SI, computed tomography angiography source images; ΔHU, Hounsfield units.