<prompt> Congenital hypertropic pyloric stenosis is diagnosed by-CTUSGMRFX-ray  <response>: 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 