Barium swallow.
D001466:Barium Sulfate; D003287:Contrast Media; D004935:Esophageal Diseases / Q000000981:diagnostic imaging* / Q000451:nursing; D006801:Humans; D024802:Nurse's Role; D010353:Patient Education as Topic; D018579:Patient Selection; D011859:Radiography
D003287:Contrast Media; D001466:Barium Sulfate