This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pediatrics
[{'content': 'In a child, non – functioning kidney is best diagnosed by : \nSelect and explain. \nA. Ultras onography, B. IVU, C. DTPA renogram, D. Creatinine clearance', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The most convenient method of estimation of renal function is by isotope renography.\nTwo types of isotope renography is there :\n\n1) Renogram, DTPA scan or MAG3 :\n\nDTPA and MAG3 are rapidly excreted by the kidney and are therefore used as radiopharmaceutical agents for dynamic scan.\nThis scan is preferred for the information :\n\ni)\xa0About the blood flow of kidney.\nii) How well each kidney is functioning.\niii) It there is any obstruction to urine output.\n2) DMSA scan :\n\nDMSA is concentrated in the renal parenchyma for a time and is therefore used as static scan.\nThis scan is preferred to lood at structure of kidney, i.e. size, shape and position.', 'role': 'assistant'}]