title: Double contrast radiology in the gastrointestinal tract.
mesh_terms: D001466:Barium Sulfate; D004386:Duodenum / Q000000981:diagnostic imaging; D004935:Esophageal Diseases / Q000000981:diagnostic imaging; D005753:Gastric Mucosa / Q000000981:diagnostic imaging; D005767:Gastrointestinal Diseases / Q000000981:diagnostic imaging*; D007410:Intestinal Diseases / Q000000981:diagnostic imaging; D007413:Intestinal Mucosa / Q000000981:diagnostic imaging; D007420:Intestine, Large / Q000000981:diagnostic imaging; D007421:Intestine, Small / Q000000981:diagnostic imaging; D011859:Radiography / Q000379:methods; D013272:Stomach Diseases / Q000000981:diagnostic imaging
chemical_list: D001466:Barium Sulfate