title: Retrograde pyelography with double contrast. A preliminary report.
mesh_terms: D000328:Adult; D000368:Aged; D002245:Carbon Dioxide; D003287:Contrast Media; D005260:Female; D006801:Humans; D007682:Kidney Pelvis / Q000000981:diagnostic imaging*; D008297:Male; D008722:Methods; D008875:Middle Aged; D014513:Ureter / Q000000981:diagnostic imaging*; D014567:Urography
chemical_list: D003287:Contrast Media; D002245:Carbon Dioxide