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Table 1: 
Number of detected aneurysms on DSA and 3DRA on 27 predefined aneurysm locations in 4 subgroups
SubgroupLocation*No. of Aneurysms
Anterior cerebral arteryAnterior communicating artery32
Pericallosal artery4
ICAICA tip3
ICA, other locations8
Posterior communicating artery20
MCAM1 segment7
M2 segment3
Bifurcation21
Posterior circulationAnterior inferior cerebellar artery0
Basilar tip8
Basilar trunk2
Posterior cerebral artery1
Posterior inferior cerebellar artery4
Superior cerebellar artery3
Vertebral artery1
Total117
  • * All locations were left and right, except for the anterior communicating artery, basilar trunk, and basilar tip, resulting in 27 predefined locations.