Pneumogastrography in early diagnosis of perforated gastroduodenal ulcers.
D000388:Air; D003287:Contrast Media; D006801:Humans; D008297:Male; D008722:Methods; D008875:Middle Aged; D010439:Peptic Ulcer Perforation / Q000000981:diagnostic imaging*; D011859:Radiography
D003287:Contrast Media