What is the definition or description of: ultrasound test?

US: An ultrasound is a non-invasive imaging study. There is no radiation from an ultrasound exam. Ultrasound gel is placed on the skin, and then a sonographer runs the ultrasound probe over the area of interest.

Ultrasound: Ultrasound is a noninvasive test that uses soundwaves to make pictures of the body. Ultrasound does not use radiation. A sonographer or ultrasound technologist uses a handheld transducer to "see" the area of interest. He/she takes pictures, which are interpreted by a radiologist. Ultrasound is widely used and is especially well-suited for pregnancies, gallbladder disease, blood vessels and more.