fig 5.

Case 10: 58-year-old woman with SAH.

A, DSA image reveals an 8-mm aneurysmal sac (arrow) at the left AcomA. The neck of the aneurysm and the relationship to the parent vessel were not clearly identified with DSA.

B, Aneurysmal sac is not clearly seen on routine MR angiogram of both ICAs and ACAs.

C, Magnified MIP MR angiogram shows a good relationship among the aneurysmal sac, the A2 portion of the right ACA (small arrows), the A2 portion of the left ACA (arrowheads), and the A1 portion of the left ACA (large arrow).

D, Magnified MPR image shows the broad neck of an aneurysm at the AcomA, and good visualization of the right (arrow) and left (arrowheads) A2 portions of the ACAs. Decreased signal intensity in the aneurysmal sac because of turbulent flow was noted on the MPR image.