An ultrasound, also called sonography, is a test that uses sound waves to see organs and tissues inside your body. It creates real-time videos and images, called sonograms.

Ultrasound is a non-invasive imaging technique that uses the differential reflectance of acoustic waves at ultrasonic frequencies to detect objects and measure distances. It is commonly used for ...

Learn all about the nature of sound and ultrasonics. How does ultrasound work? What can be discovered through the use of ultrasound imaging?