title: Single contrast barium technique or air-contrast technique in examination of G.I. (gastrointestinal) tract. A comparison.
mesh_terms: D000388:Air; D001466:Barium Sulfate; D003110:Colonic Neoplasms / Q000000981:diagnostic imaging; D003287:Contrast Media; D005770:Gastrointestinal Neoplasms / Q000000981:diagnostic imaging*; D006801:Humans; D007417:Intestinal Polyps / Q000000981:diagnostic imaging; D011859:Radiography; D013274:Stomach Neoplasms / Q000000981:diagnostic imaging
chemical_list: D003287:Contrast Media; D001466:Barium Sulfate