Agreement between non-invasive procedures and digital subtraction angiography for appropriateness of surgery for symptomatic carotid stenosis
| DSA | |||||
|---|---|---|---|---|---|
| Non-invasive technique | Operable | Not operable | Sensitivity | Specificity | |
| Operable, 80–99% stenosis; not operable, 0–79% or 100% stenosis. | |||||
| CT, computed tomography; DSA, digital subtraction intra-arterial angiography; MR, magnetic resonance. | |||||
| CT angiography | Operable | 13 | 0 | ||
| Not operable | 7 | 14 | 0.65 | 1.00 | |
| MR angiography | Operable | 20 | 6 | ||
| Not operable | 0 | 8 | 1.00 | 0.57 | |
| Doppler | Operable | 17 | 4 | ||
| Not operable | 3 | 10 | 0.85 | 0.71 | |