Comparative analysis of CTA and MRA versus DSA for intracranial stenosis
| Performance Measure | CTA | MRA |
|---|---|---|
| Sensitivity | 98 (98) | 70 (70) |
| Specificity | 98 (99) | 99 (97) |
| Positive predictive value | 78 (93) | 63 (65) |
| Negative predictive value | 100 (100) | 98 (98) |
Note.—Data are percentages using DSA as the reference standard; numbers in parentheses are percentages corrected for DSA false-positive stenosis by consensus reading. See Tables 7 and 9 for raw data.