Diagnostic ultrasound, also called sonography or diagnostic medical sonography, is an imaging method that uses high-frequency sound waves to produce relatively precise images of structures within your body. The images produced during an ultrasound examination often provide valuable information for diagnosing and treating a variety of diseases and conditions.

Most ultrasound examinations are done using a sonar device outside of your body, though some ultrasound examinations involve placing a device inside your body.

Feb. 23, 2012