Fig 2. MRA time-of-flight image (case 2). A, A small aneurysm in the anterior communicating artery was suggested. B, Volume rendering images of IV 3D DSA (case 2). A small aneurysm was recognized, and the surrounding arterial branches were depicted. C, MIP of IV 3D DSA (case 2). The size of the aneurysm was 3.2 x 2.2 mm for the aneurysm sack and 3.2 mm for the neck.