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Fig. 1. —Coronal reformatted CT colonographic scan was obtained in group 4 patient who ingested 50 mL of 40% weight/volume barium suspension over course of 1 day. All residue with density exceeding 150 H is electronically labeled in green. Residual stool is seen in cecoascending and descending segments of colon. Percentage of residue labeled was scored as 100%.