title: Fasting radiological examinations: factors affecting excellence and economy.
mesh_terms: D002400:Cathartics / Q000008:administration & dosage; D003106:Colon / Q000000981:diagnostic imaging*; D004733:Enema; D005215:Fasting; D006801:Humans; D011859:Radiography / Q000191:economics*
chemical_list: D002400:Cathartics