An X-ray is a widely used diagnostic test to examine the inside of the body. X-rays are a very effective way of detecting problems with bones, such as fractures. They can also often identify problems with soft tissue, such as pneumonia or breast cancer.
If you have a X-ray, you will be asked to lie on a table or stand against a surface so that the part of your body being X-rayed is between the X-ray tube and the photographic plate.
An X-ray is usually carried out by a radiographer, a healthcare professional who specialises in using imaging technology, such as X-rays and ultrasound scanners.
You can find out more about x-ray tests, CT scans, MRI scans and ultrasound scans and how they are performed, their function and the risks by visiting the NHS Choices website.
Alternatively this American site gives information with some videos about X-rays, CT Scans, MRI's, ultrasounds and more but there may be slight variations with practice in the UK: http://www.radiologyinfo.org/