title: Barium enema versus colonoscopy.
mesh_terms: D001466:Barium Sulfate; D003093:Colitis, Ulcerative / Q000175:diagnosis* / Q000000981:diagnostic imaging; D003106:Colon / Q000000981:diagnostic imaging; D003110:Colonic Neoplasms / Q000175:diagnosis* / Q000000981:diagnostic imaging; D004724:Endoscopy; D004733:Enema; D006471:Gastrointestinal Hemorrhage / Q000175:diagnosis; D006801:Humans; D007413:Intestinal Mucosa; D007417:Intestinal Polyps / Q000175:diagnosis* / Q000000981:diagnostic imaging; D011351:Proctoscopy; D011859:Radiography; D012812:Sigmoidoscopy
chemical_list: D001466:Barium Sulfate