The Rapiscan works by beaming electromagnetic waves on to passengers as they stand in a booth, creating a virtual three-dimensional black-and-white ‘naked’ image from the reflected energy and sending it to a computer monitor elsewhere in the airport where it is examined by a security officer.

The whole process takes only about 20 seconds and then the image is deleted.

But the scans show every contour of people’s bodies – even revealing breast implants – which some may find intrusive.

All of this xray stuff is not good for the body and is even harder on undeveloped children's bodies.