title: Rectosigmoid double contrast examination in the prone position with a horizontal beam.
mesh_terms: D012809:Colon, Sigmoid / Q000000981:diagnostic imaging*; D006801:Humans; D011187:Posture; D011859:Radiography; D012007:Rectum / Q000000981:diagnostic imaging*; D013679:Technology, Radiologic / Q000379:methods*