A prenatal ultrasound test uses high-frequency sound waves, inaudible to the human ear, that are transmitted through the abdomen via a device called a transducer to look at the inside of the abdomen.

A Doppler ultrasound is a test that uses high-frequency sound waves to measure the amount of blood flow through your arteries and veins, usually those that supply blood to your arms and legs. Vascular ...

The ultrasound scan is one of the most widely used and most valuable diagnostic tools in modern medicine. It came into medical practice more than 50 years ago and is now an essential facility in today ...