Fig. 4

Correlation and agreement between the tests for maximum diameter measurements: (a) correlation plot between 2-D US and CT, (b) correlation plot between 3-D US and CT, (c) Bland-Altman plot between 2-D US and CT, and (d) Bland-Altman plot between 3-D US and CT. AAA, abdominal aortic aneurysm; CT, computed tomography; Dmax, maximum diameter of the abdominal aorta; 2-D US, two-dimensional ultrasonography; 3-D US, three-dimensional ultrasonography