Intravenous Pyelography Versus Radioisotope Renography Combined with Plain Roentgenography of the Urinary Tract in the Follow-Up of Patients with Ureteral Calculi

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Abstract
Isotope renography combined with plain roentgenography of the urinary tract was compared with intravenous pyelography in the follow-up of 50 patients with pyelographically confirmed, radiopaque ureteral stone. The combined method was as informative as intravenous pyelography regarding the site of the obstruction, and gave better information on the function of the renal parenchyma and the passage of urine. Since in the combined method the level of radiation to which the patient is exposed is much lower than in intravenous pyelography, and since no allergic reaction to the combined method has been reported, it would seem useful in the follow-up of patients with roentgenographically visualized ureteral stone.