Dome-to-neck ratios in 2D DSA versus 3DRA
| 2D DSA | 3DRA | P Value | |
|---|---|---|---|
| Mean D/N (SD) | 1.81 (0.55) | 1.56 (0.48) | <.0001* |
| D/N <1.5, No. (%) | 69 (33.7) | 119 (58.0) | <.0001† |
| D/N <2.0, No. (%) | 142 (69.3) | 173 (84.4) | .0004† |
Note:—D/N indicates dome-to-neck ratio; DSA, digital subtraction angiography; 3DRA, 3D rotational angiography.
* Paired t test, Wilcoxon signed ranked test.
† Pearson χ2 test.