Radiological signs of ulcerative colitis: assessment of their reliability by means of observer variation studies.
D001466:Barium Sulfate; D003093:Colitis, Ulcerative / Q000000981:diagnostic imaging*; D003937:Diagnosis, Differential; D005767:Gastrointestinal Diseases / Q000000981:diagnostic imaging; D006801:Humans; D011859:Radiography
D001466:Barium Sulfate