title: CT colonography: progress toward colorectal evaluation without catharsis.
authors.forename: Elizabeth G
authors.initials: EG
authors.lastname: McFarland
authors.forename: Michael E
authors.initials: ME
authors.lastname: Zalis
mesh_terms: D002400:Cathartics; D003106:Colon / Q000000981:diagnostic imaging*; D023881:Colonography, Computed Tomographic / Q000639:trends*; D006801:Humans; D012007:Rectum / Q000000981:diagnostic imaging*
chemical_list: D002400:Cathartics