title: Radiography of oesophageal obstructions.
mesh_terms: D000818:Animals; D001466:Barium Sulfate; D004283:Dog Diseases / Q000000981:diagnostic imaging*; D004285:Dogs; D004935:Esophageal Diseases / Q000000981:diagnostic imaging / Q000662:veterinary*; D005547:Foreign Bodies / Q000000981:diagnostic imaging; D011859:Radiography
chemical_list: D001466:Barium Sulfate