title: Double-contrast (air-contrast) radiology of the stomach and duodenum.
mesh_terms: D000388:Air; D001466:Barium Sulfate; D004386:Duodenum / Q000000981:diagnostic imaging*; D005770:Gastrointestinal Neoplasms / Q000000981:diagnostic imaging; D006801:Humans; D008722:Methods; D010437:Peptic Ulcer / Q000000981:diagnostic imaging; D011859:Radiography; D013270:Stomach / Q000000981:diagnostic imaging*; D013679:Technology, Radiologic
chemical_list: D001466:Barium Sulfate