Endoscopic sonography was performed with a side-viewing instrument (GF-UM 20, Olympus, Tokyo, Japan) with. Sonography is a painless medical procedure that uses high-frequency sound waves to produce visual images of organs, tissues and blood flow inside the body. It was first used in obstetrics to look at fetal development in the 1970s, but. The Diagnostic Medical Sonography (Ultrasound) program at the Platt School of Medical Sciences is designed to prepare…