Ultrasound or ultrasound is a type of harmless technique. It uses high-frequency sound waves to observe organs and structures inside the body. Health professionals use them to view the heart, blood vessels, kidneys, liver, and other organs. During pregnancy, doctors use ultrasound tests to
observe the fetus. Unlike x-rays, ultrasound does not expose radiation.
During the test, you lie on a table. A special technician or doctor moves a device called a transducer over a part of the body. The transducer sends sound waves that bounce off tissues inside the body. The transducer also captures the bouncing waves. The ultrasound machine creates the images of these sound waves.