Trends in pediatric uroradiology.

Excretory urography, conventional and radionuclide voiding cysto(urethro)graphy, ultrasonography, radionuclide renal imaging and computed tomography are all currently readily available in most locales for the evaluation of the child's urinary tract. It is the responsibility of the radiologist to determine which studies are best for which children and the order in which they should be performed to minimize "cost" while maximizing the information obtained. A description of such an approach and its consequences are presented.