Table 4.
Diagnostic accuracy for perfusion parameters for qualitative interpretation before and after excluding lesions not found on the computer-generated lesion maps
| Qualitative evaluation only (%) | Qualitative analysis and computer lesion maps (%) | |
|---|---|---|
| CBV | ||
| Study sensitivity | 30 (0.95 CI 14–53) | 30 (0.95 CI 14–53) |
| Study specificity | 87 (0.95 CI 74–95) | 91 (0.95 CI 79–97) |
| Negative predictive value | 72 (0.95 CI 58–83) | 73 (0.95 CI 60–83) |
| Positive predictive value | 54 (0.95 CI 26–80) | 64 (0.95 CI 32–88) |
| CBF | ||
| Study sensitivity | 48 (0.95 CI 27–69) | 48 (0.95 CI 27–69) |
| Study specificity | 83 (0.95 CI 69–92) | 89 (0.95 CI 76–96) |
| Negative predictive value | 76 (0.95 CI 62–87) | 78 (0.95 CI 64–88) |
| Positive predictive value | 58 (0.95 CI 34–79) | 69 (0.95 CI 41–88) |
| MTT | ||
| Study sensitivity | 61 (0.95 CI 39–80) | 61 (0.95 CI 39–80) |
| Study specificity | 68 (0.95 CI 53–80) | 77 (0.95 CI 62–87) |
| Negative predictive value | 78 (0.95 CI 62–89) | 80 (0.95 CI 65–90) |
| Positive predictive value | 48 (0.95 CI 30–67) | 56 (0.95 CI 35–75) |
| TTP | ||
| Study sensitivity | 61 (0.95 CI 39–80) | 61 (0.95 CI 39–80) |
| Study specificity | 66 (0.95 CI 51–79) | 77 (0.95 CI 62–87) |
| Negative predictive value | 78 (0.95 CI 61–89) | 80 (0.95 CI 65–90) |
| Positive predictive value | 47 (0.95 CI 29–65) | 56 (0.95 CI 35–75) |