Accuracy of single and double contrast barium meal studies.
D001464:Barium / Q000008:administration & dosage*; D002986:Clinical Trials as Topic; D003287:Contrast Media; D004724:Endoscopy; D005767:Gastrointestinal Diseases / Q000000981:diagnostic imaging; D006801:Humans; D011859:Radiography
D003287:Contrast Media; D001464:Barium