title: [Simple interpretation of radiograms. 8. X-ray examination of the upper gastrointestinal tract (1)].
mesh_terms: D004064:Digestive System / Q000000981:diagnostic imaging*; D004947:Esophagus / Q000000981:diagnostic imaging; D006801:Humans; D011859:Radiography; D013270:Stomach / Q000000981:diagnostic imaging