Routine air-contrast esophagography during upper gastrointestinal examinations.
D004935:Esophageal Diseases / Q000175:diagnosis; D004943:Esophagogastric Junction / Q000000981:diagnostic imaging; D004947:Esophagus / Q000000981:diagnostic imaging*; D006801:Humans; D008722:Methods; D009092:Mucous Membrane / Q000000981:diagnostic imaging; D011859:Radiography; D013679:Technology, Radiologic