This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Abdominal Radiography, Subject name: Radiology
[{'content': 'Congenital hypertropic pyloric stenosis is diagnosed by- \nSelect and explain. \nA. CT, B. USG, C. MRF, D. X-ray', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., USG o USG is the imaging modality of choice for evalution of infantile pyloric stenosis. It is both highly sensitive (90-99%) and specific (95-100%) in the hands of a qualified sonographer.o USG findings of infantile pyloric stenosis are:* Target sign- Pyloric muscle wall thickness - 4mm* Cervix sign- Pyloric length (segment length) - >16mm* Antral nipple sign- Pyloric diameter -> 15mm", 'role': 'assistant'}]