Sensitivity and specificity of contrast-enhanced MR angiography for the evaluation of disease in the carotid and vertebrobasilar circulations
| Observer 1 | Observer 2 | |||
|---|---|---|---|---|
| Sensitivity (%) | Specificity (%) | Sensitivity (%) | Specificity (%) | |
| Stenosis only | ||||
| ICA | 88 | 97 | 100 | 99 |
| VB | 86 | 99 | 100 | 100 |
| ICA + VB | 87 | 99 | 100 | 100 |
| Occlusion only | ||||
| ICA | 100 | 100 | 100 | 100 |
| VB | 83 | 99 | 79 | 99 |
| ICA + VB | 86 | 99 | 82 | 99 |
| Stenosis and occlusion | ||||
| ICA | 92 | 97 | 100 | 99 |
| VB | 86 | 98 | 87 | 99 |
| ICA + VB | 88 | 98 | 91 | 99 |
| All disease | ||||
| ICA | 94 | 97 | 100 | 97 |
| VB | 88 | 98 | 88 | 99 |
| ICA + VB | 90 | 97 | 92 | 98 |
Note.—ICA indicates internal carotid artery; VB, vertebrobasilar circulation.