Fig. 1

3D reconstruction and quantification of dirty mass with the Ziostation software. a The position of a dirty mass is indicated by the yellow-dashed line that was hand-traced on an axial MDCT image. These outlines were used to construct a 3D image. b Representative 3D image of a dirty mass constructed using Ziostation. The dirty mass (green) is located next to the sigmoid colon (pink). The volume of the dirty mass was calculated as 419.2 cm³