CT and CTA findings
| Observer 1 | Observer 2 | Agreement (κ) | PPV/NPV of CTA | |
|---|---|---|---|---|
| NCE-CT (n = 71) | ||||
| Intracerebral hematoma | 46 | 38 | 31 | |
| Inta-Sylvian hematoma | 25 | 33 | 23 | |
| Total | 54 (0.55) | |||
| Confident about localization | 28 (0.85) | |||
| CTA (n = 71) | ||||
| Vessel enhancement | 30 | 32 | 28 | |
| No vessel enhancement | 34 | 32 | 32 | |
| Combined hematoma | 7 | 7 | 7 | |
| Total | 67 (0.87) | |||
| CTA compared with noncontrast CT in subset of “certain” NCE-CT (n = 28) | PPV = 90% NPV = 100% |