title: New aid for manipulating radiolucent ureteral calculi.
mesh_terms: D003287:Contrast Media / Q000008:administration & dosage; D006801:Humans; D011859:Radiography; D014514:Ureteral Calculi / Q000000981:diagnostic imaging / Q000628:therapy*; D014572:Urology / Q000295:instrumentation*
chemical_list: D003287:Contrast Media