title: Radiopaque markers for the assessment of mechanical preoperative bowel preparation.
mesh_terms: D003106:Colon / Q000000981:diagnostic imaging; D003110:Colonic Neoplasms / Q000000981:diagnostic imaging* / Q000601:surgery; D003287:Contrast Media / Q000008:administration & dosage; D006801:Humans; D011300:Preoperative Care; D011859:Radiography
chemical_list: D003287:Contrast Media