title: The dilated upper urinary tract.
mesh_terms: D006801:Humans; D007674:Kidney Diseases / Q000000981:diagnostic imaging* / Q000503:physiopathology; D011859:Radiography; D011868:Radioisotopes; D014517:Ureteral Obstruction / Q000000981:diagnostic imaging*; D014563:Urodynamics
chemical_list: D011868:Radioisotopes