title: Utilization of the double-contrast barium enema in the early era of screening CT colonography.
authors.forename: Perry J
authors.initials: PJ
authors.lastname: Pickhardt
mesh_terms: D001466:Barium Sulfate; D003111:Colonic Polyps / Q000175:diagnosis*; D023881:Colonography, Computed Tomographic / Q000191:economics*; D003113:Colonoscopy; D003287:Contrast Media / Q000008:administration & dosage; D004733:Enema / Q000191:economics / Q000706:statistics & numerical data*; D006801:Humans; D019458:Insurance Coverage; D012189:Retrospective Studies
chemical_list: D003287:Contrast Media; D001466:Barium Sulfate