Comparative analysis of CTA and MRA versus DSA for intracranial occlusion
| Performance Measure | CTA | MRA |
|---|---|---|
| Sensitivity | 71 (100) | 81 (87) |
| Specificity | 100 (100) | 98 (98) |
| Positive predictive value | 100 (100) | 61 (59) |
| Negative predictive value | 99 (100) | 99 (99.5) |
Note.—Data are percentages using DSA as the reference standard; numbers in parentheses are percentages corrected for DSA false-positive occlusion by consensus reading. See Tables 6 and 8 for raw data.