title: Patterns of sigmoid colon and their implications for barium-enema radiography.
mesh_terms: D001466:Barium Sulfate; D012809:Colon, Sigmoid / Q000033:anatomy & histology* / Q000000981:diagnostic imaging*; D004733:Enema; D005471:Fluoroscopy / Q000379:methods; D006801:Humans; D008722:Methods; D008953:Models, Anatomic; D011856:Radiographic Image Enhancement
chemical_list: D001466:Barium Sulfate