Definitions of the scales of assessment used
| Angiographic Assessment Scale in the Current Study | Operator Angiographic Assessment Scalea | Core Laboratory Angiographic Assessment Scale Immediately after Embolization | Core Laboratory Angiographic Assessment Scale at Follow-Up |
|---|---|---|---|
| Grade 1 | Complete occlusion | Apparently complete occlusion or overlapping coils/neck | Complete occlusion |
| Grade 2 | Subtotal occlusion or neck remnant | Neck remnant | Stable neck appearance/neck remnant |
| Grade 3 | Incomplete occlusion/aneurysm filling | Inflow/incomplete occlusion (body filling) | Residual filling |
↵a Cases assessed as “failed embolization” by the operators were excluded from the analysis of this study.