Fig 4. Images obtained in a 44-year-old woman with SAH. A, 3D volume-rendered CTA image in oblique view shows a small anterior communicating aneurysm. Adjacent A2 segment from both anterior cerebral arteries "seem" to be incorporated within the aneurysm wall (arrow). B, Oblique view from pre-embolization DSA shows that both A2 segments are clearly separated from the aneurysm neck and sac.