Unravelling the tangled sigmoid. Routine angulation of the tube in the detection of occult lesions.
D001466:Barium Sulfate; D002277:Carcinoma / Q000000981:diagnostic imaging; D012809:Colon, Sigmoid / Q000033:anatomy & histology / Q000000981:diagnostic imaging*; D004733:Enema; D005471:Fluoroscopy; D006801:Humans; D011187:Posture; D012811:Sigmoid Neoplasms / Q000000981:diagnostic imaging*
D001466:Barium Sulfate