Location and size of aneurysms detected only at 3D RA
| No. | Location* | Width × Length × Neck Size, mm | Status | DSA | |
|---|---|---|---|---|---|
| Quality† | Series Sufficient‡ | ||||
| 1 | Ophthalmic | 1.4 × 2.3 × 2.3 | Unruptured | Excellent | Yes |
| 2 | Ophthalmic | 1.1 × 0.9 × 0.9 | Unruptured | Excellent | Yes |
| 3 | A2 segment of the ACA | 1.4 × 1.7 × 1.7 | Unruptured | Excellent | Yes |
| 4 | MCA bifurcation | 2.2 × 2.2 × 1.6 | Ruptured | Excellent | Yes |
| 5 | MCA bifurcation | 1.6 × 1.5 × 1.6 | Unruptured | Excellent | Yes |
| 6 | MCA bifurcation | 2.3 × 2.2 × 2.7 | Ruptured | Excellent | No |
| 7 | M1 segment of the MCA | 1.1 × 1.5 × 1.5 | Unruptured | Excellent | No |
* ACA indicates anterior cerebral artery; MCA, middle cerebral artery.
† The overall quality of the DSA images with respect to the 3D DSA series was graded as excellent, good, sufficient, or insufficient.
‡ The sufficiency of the number of DSA series in diagnosing or excluding an aneurysm was assessed in terms of the following: usefulness for selective catheterization, adequacy in the depiction of all regions of a vascular territory with minimal overlapping, and depiction of the early arterial phase.