The double-contrast enema.
D001466:Barium Sulfate; D003108:Colonic Diseases / Q000000981:diagnostic imaging*; D003110:Colonic Neoplasms / Q000000981:diagnostic imaging; D003424:Crohn Disease / Q000175:diagnosis; D004241:Diverticulum, Colon / Q000000981:diagnostic imaging; D004733:Enema / Q000009:adverse effects; D006801:Humans; D011859:Radiography
D001466:Barium Sulfate