In a child, non – functioning kidney is best diagnosed by :

The most convenient method of estimation of renal function is by isotope renography. Two types of isotope renography is there : 1) Renogram, DTPA scan or MAG3 : DTPA and MAG3 are rapidly excreted by the kidney and are therefore used as radiopharmaceutical agents for dynamic scan. This scan is preferred for the information : i) About the blood flow of kidney. ii) How well each kidney is functioning. iii) It there is any obstruction to urine output. 2) DMSA scan : DMSA is concentrated in the renal parenchyma for a time and is therefore used as static scan. This scan is preferred to lood at structure of kidney, i.e. size, shape and position.