title: Ureteropelvic junction obstruction: use of helical CT for preoperative assessment--comparison with intraarterial angiography.
authors.forename: R V
authors.initials: RV
authors.lastname: Clayman
mesh_terms: D015901:Angiography, Digital Subtraction; D006801:Humans; D007682:Kidney Pelvis / Q000000981:diagnostic imaging* / Q000601:surgery; D012077:Renal Artery / Q000000981:diagnostic imaging*; D014057:Tomography, X-Ray Computed / Q000379:methods; D014517:Ureteral Obstruction / Q000000981:diagnostic imaging* / Q000601:surgery