Table 1:

Definitions of the scales of assessment used

Angiographic Assessment Scale in the Current StudyOperator Angiographic Assessment ScaleaCore Laboratory Angiographic Assessment Scale Immediately after EmbolizationCore Laboratory Angiographic Assessment Scale at Follow-Up
Grade 1Complete occlusionApparently complete occlusion or overlapping coils/neckComplete occlusion
Grade 2Subtotal occlusion or neck remnantNeck remnantStable neck appearance/neck remnant
Grade 3Incomplete occlusion/aneurysm fillingInflow/incomplete occlusion (body filling)Residual filling
  • a Cases assessed as “failed embolization” by the operators were excluded from the analysis of this study.