An ultrasound is a medical imaging technique that uses a transducer or probe, to generate sound waves and computer technology to produce pictures of the body's internal organs. Unlike other imaging techniques, an ultrasound creates “movies” that capture the movement of organs including heartbeats, contractions of bowel loops, and flow of blood vessels. An ultrasound is a safe and painless study where a small transducer gently follows a clear gel that is placed directly on the skin. The soundwaves admitted from the transducer pass through the gel, reflect off of the body, then are received by a computed to create an image. An ultrasound can evaluate different soft tissue structures in the body including the thyroid gland, breasts, abdomen, and pelvic organs.