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Representative cases. A: CT image was used to rate the stool volume as 4 and the gas volume as 2 (red circle). (a), Ascending colon. B: CT image was used to rate the stool volume as 1 and the gas volume as 2 (red circle). (sf), Splenic flexure. C: CT image was used to rate the stool volume as 3 and the gas volume as 2 (red circle). (d), Descending colon. D: CT image was used to rate the stool volume as 3 and the gas volume as 3 (red circle). (re), Rectum.
