Pancreatic duct diameter: sonographic measurement in normal subjects.

In a prospective ultrasonic study of the pancreatic duct, 233 sonograms were obtained from 49 normal subjects. The duct in the regions of the head-neck and body was measured in the transverse/oblique planes. The mean diameter of the duct in the area of the head-neck was 3 mm; in the body proximal and distal to the neck, duct diameters were 2.1 and 1.6 mm, respectively.