How ultrasound scans work

Asmall device called an ultrasound probe is used, which gives off high-frequency sound waves.

You can't hear these sound waves, but when they bounce off different parts of the body, they create "echoes" that are picked up by the probe and turned into a moving image.

This image is displayed on a monitor while the scan is carried out.

Content supplied by the NHS Website

Medically Reviewed by a doctor on 21 Dec 2018