Fig. 5. False-positive case. A bulging contour at the right paraclinoid internal carotid artery was noted on TOF MRA (A). The lesion was not an aneurysm but the orifice of the ophthalmic artery (arrow), and it was clearly seen on MIP image (C). The model falsely presented the bulging contour at the orifice of the right ophthalmic artery as an aneurysm (red box in B). TOF, time-of-flight; MRA, magnetic resonance angiography; MIP, maximum intensity projection.