Findings of 3D TOF MRA and DSA with regard to aneurysm size
| MRA Finding | DSA Finding | |
|---|---|---|
| Residual Neck | Complete Occlusion | |
| Aneurysms ≤ 3 mm | ||
| Residual neck | 7 | 3 |
| Complete occlusion | 4 | 19 |
| Percentage | 63.6 (31–89) | 86.4 (65–97) |
| Aneurysms >3 mm | ||
| Residual neck | 47 | 6 |
| Complete occlusion | 3 | 99 |
| Percentage | 94 (84–99) | 94.3 (88–98) |
| Residual neck | 47 | 6 |
| Aneurysms ≤ 5 mm | ||
| Residual neck | 13 | 3 |
| Complete occlusion | 5 | 52 |
| Percentage | 72.2 (62–82) | 94.5 (89–100) |
| Aneurysms > 5 mm | ||
| Residual neck | 41 | 6 |
| Complete occlusion | 2 | 66 |
| Percentage | 95.3 (84–99) | 91.7 (83–97) |
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.