But the new RTT machine works as quickly as an x-ray, providing detailed 3-D images of the item being scanned at around 1,500 to 1,800 bags per hour.

It can also detect viscosity levels in liquids, alerting the operator to fluids which may be hidden explosives.

The scanner was invented by Rapiscan's technical director Ed Morton, who is based in Congleton.

He said: "It is a much smaller system than our previous machines, which were for scanning cargo, and it's unique in that the images it scans are created quickly and are of a high quality.

"We're already working with the University of Manchester in the development of this programme, and four or five researchers who are involved in its design.

"Manchester Airport is the first to order the scanner - as part of a £40 million deal - but this is a global product."

Ken Mann, general manager of the RTT programme, said Rapiscan had received a lot of interest from potential customers around the world. He said:"The RTT scanner brings medical technology to bag scanning. Manchester Airport is the first to buy the scanners, but other companies have approached us about deals to supply them with the machines.