Fig 4. MRA time-of-flight image (case 4). A, A small aneurysm in the anterior communicating artery was suggested. B, Volume rendering images of IV 3D DSA (case 4). The suggested aneurysm was not recognized. The suggested lesion was thought to be the curved portion of the anterior communicating artery. C, MIP of IV 3D DSA (case 4). The suggested aneurysm was not recognized.