Fig 3. MRA time-of-flight image (case 3). A, A small aneurysm in the left middle cerebral artery was suggested. B, Volume rendering images of IV 3D DSA (case 3). The suggested aneurysm was not recognized. The suggested lesion was thought to be the curved portion of the M1 segment of the left middle cerebral artery. C, MIP of IV 3D DSA (case 3). The suggested aneurysm was not recognized.