Sensitivity, specificity (95% confidence limits in parentheses), positive predictive value, negative predictive value, and accuracy of MSCTA (compared with DSA) in the depiction of intracranial vasospasms, depending on anatomic location
| Location of Vasospasm | Sensitivity (%) | Specificity (%) | Positive Predictive Value (%) | Negative Predictive Value (%) | Accuracy (%) |
|---|---|---|---|---|---|
| Distal carotid artery | 45 (16–74) | 100 | 100 | 83 | 85 |
| A1 segment | 87.5 (71–100) | 100 | 100 | 92 | 95 |
| M1 segment | 100 | 96 (88–100) | 93 | 100 | 97 |
| A2 segment | 100 | 100 | 100 | 100 | 100 |
| M2 segment | 100 | 100 | 100 | 100 | 100 |
| Basilar artery | 100 | 100 | 100 | 100 | 100 |
| Total | 87.7 (79–96) | 99.2 (98–100) | 98.3 | 94.1 | 95.4 |
Note:—MSCTA indicates multisection CT angiography; DSA, digital substraction angiography. Posterior cerebral artery location was not reported because no vasospasm was found on this segment.