Fig. 3
From: Vessel diameters of 14 basal cerebral arteries assessed in 1000 digital subtraction angiographies
Assessment of the A1 segment of the left anterior cerebral artery. The caliper is placed 3 to 5 mm distal to the carotid T and angled until parallel lining of its branches with the adjacent vessel walls is achieved. DSA, ap-projection, the diameter reads 2.08 mm.
