<prompt> In a child, non - functioning kidney is best diagnosed by-UltrasonographyIVUDTPA renogramCreatinine clearance  <response>: Ans. is c i.e., DTPA renogram o The most convenient method of estimation of renal function is by isotope renography. Kumar85 o 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. 