Double and triple contrast technics in examination of the upper gastrointestinal tract in problem cases.
D000792:Angiography; D001464:Barium / Q000008:administration & dosage*; D002277:Carcinoma / Q000000981:diagnostic imaging; D004932:Esophageal and Gastric Varices / Q000000981:diagnostic imaging; D005756:Gastritis / Q000000981:diagnostic imaging; D005767:Gastrointestinal Diseases / Q000000981:diagnostic imaging*; D006801:Humans; D010190:Pancreatic Neoplasms / Q000000981:diagnostic imaging; D011028:Pneumoperitoneum, Artificial; D013274:Stomach Neoplasms / Q000000981:diagnostic imaging; D013276:Stomach Ulcer / Q000000981:diagnostic imaging
D001464:Barium