Fig 5. Case 5, Left internal carotid artery–posterior communicating artery aneurysm, in a 66-year-old woman.

A, 3D MR angiogram shows an aneurysm with an irregular dome (arrow).

B, 3D MR cisternogram, coordinated projection as to the 3D MR angiogram in A, shows an aneurysm (arrow) and a large posterior communicating artery. AChorA, anterior choroidal artery; CN-III (arrow).

C, Fusion image of the 3D MR angiography/cisternography shows the aneurysm complex in relation to its perianeurysmal environment.