title: [Theoretical approach to the optimum exposure time in intravenous pyelography].
mesh_terms: D000328:Adult; D003287:Contrast Media / Q000008:administration & dosage; D005260:Female; D006801:Humans; D007275:Injections, Intravenous; D008297:Male; D008433:Mathematics; D008875:Middle Aged; D008954:Models, Biological; D013997:Time Factors; D014567:Urography / Q000379:methods*
chemical_list: D003287:Contrast Media