Fig. (3) Anterior communicating artery aneurysm seen by DSA (A and B, arrows) and CTA (C-E, arrows). The lobular/saccular morphology of the aneurysm is more clearly seen on CTA, and the ability for rotational views allows visualization of the anatomy from above (A), the side (B), and below (C) to provide a valuable three-dimensional representation of the aneurysm.