Angled radiography in upper gastrointestinal examinations.
D004064:Digestive System / Q000000981:diagnostic imaging*; D004381:Duodenal Ulcer / Q000000981:diagnostic imaging; D004386:Duodenum / Q000000981:diagnostic imaging; D006801:Humans; D008722:Methods; D011706:Pyloric Antrum / Q000000981:diagnostic imaging; D011708:Pylorus / Q000000981:diagnostic imaging; D011859:Radiography; D013276:Stomach Ulcer / Q000000981:diagnostic imaging