Findings of unenhanced and contrast-enhanced 3D TOF MRA compared with DSA
| MRA Finding | DSA Finding | |
|---|---|---|
| Residual Neck | Complete Occlusion | |
| Unenhanced MRA | ||
| Residual neck | 24 | 4 |
| Complete occlusion | 3 | 46 |
| Percentage | 88.9 (70.1–97.6) | 92 (80.8–97.7) |
| Contrast-enhanced MRA | ||
| Residual neck | 30 | 5 |
| Complete occlusion | 4 | 72 |
| Percentage | 88.2 (72.6–96.7) | 93.5 (85.5–97.7) |
Note:—TOF indicates time of flight; MRA, magnetic resonance angiography; DSA, digital subtraction angiography. Percentages represent sensitivity (left column) and specificity (right column); figures in parentheses are 95% confidence intervals.