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Table 7: 
Evolution of final angiographic outcome based on initial results (no. of aneurysms)
Matrix CoilsBare Platinum Coils
OBL (23 aneurysms)OBL (32 aneurysms)
    OBL14    OBL19
    Neck1    Neck2
    Recurrence3    Recurrence0
    No. retreated2    No. retreated0
Neck (30 aneurysms)Neck (30 aneurysms)
    OBL10    OBL7
    Neck4    Neck5
    Recurrence9    Recurrence9
    No. retreated6    No. retreated6
Residual + Recurrence (29 aneurysms)Residual + Recurrence (18 aneurysms)
    OBL5    OBL2
    Neck4    Neck1
    Recurrence18    Recurrence8
    No. retreated9    No. retreated1
  • Note:—OBL indicates obliterated.
  • Number of aneurysms with final result is less than initial number as a result of patients lost to follow-up.