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Fig 1. MRA time-of-flight image (case 1). A, An aneurysm in the right internal carotid artery was suggested. B, Volume rendering image of IV 3D DSA (case 1). The aneurysm and its relationship with the surrounding arterial branches were depicted. 1 indicates internal carotid artery; 2, middle cerebral artery; 3, posterior cerebral artery; 4, A1 segment of the anterior cerebral artery. C, MIP of IV 3D DSA (case 1). The size of the aneurysm was 14.7 x 9.1 mm for the aneurysm sack and 5.5 mm for the neck. D, Volume rendering images of IA 3D DSA (case 1). The aneurysm was depicted in higher spatial resolution, and small vessels surrounding the aneurysm were revealed (arrows).
