Fig. 1
From: Vessel diameters of 14 basal cerebral arteries assessed in 1000 digital subtraction angiographies
Assessment of the terminal segment of the left carotid artery. The caliper is placed 3 to 5 mm proximal 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 3.38 mm.
