Fig. 1.

Method of colonic size ratio measurements. a A schematic depiction of the colonic size characteristics that were assessed. b The image from an air contrast enema from one of the children from this study. Lines indicate characteristics that were measured to calculate the colonic diameter ratios. A ascending colon diameter, D descending colon diameter, L2 width vertebral body L2, R rectum diameter, S sigmoid colon diameter, T transverse colon diameter