title: X-ray study of the appendix after oral administration of barium.
mesh_terms: D000284:Administration, Oral; D001064:Appendicitis / Q000000981:diagnostic imaging*; D001466:Barium Sulfate / Q000008:administration & dosage*; D003937:Diagnosis, Differential; D006801:Humans; D011859:Radiography
chemical_list: D001466:Barium Sulfate