Ultrasound imaging, also called ultrasound scanning or sonography, involves
exposing part of the body to high-frequency sound waves to produce pictures
of the inside of the body. Ultrasound exams do not use the radiation used
in X-rays. Because ultrasound images are captured in real-time, they can
show the structure and movement of the body's internal organs, as
well as blood flowing through blood vessels.
Ultrasound can be used to view most major organs. It is a noninvasive medical
test that helps physicians diagnose and treat medical conditions including cancer.