A new spy machine could have major implications for national security and health care.

The device, called a T-ray machine, can be used to read books without opening them, scan documents without leaving fingerprints and see through all kinds of materials.

Spy chiefs are now in talks with Professor Martyn Chamberlain about his research at the Univeristy of Durham.

They believe the machine could be used to check for weapons under clothing or at airports to search passengers or to scan lorries for drugs or illegal immigrants.

It could also have a major impact on the way cancer patients are treated, with medics able to detect tumours much earlier.

Prof Chamberlain has held a meeting with Ministry of Defence officials and US security agents to discuss how the idea could be used.

The machine uses terahertz waves, which lie between microwaves and infra-red on the electromagnetic spectrum.

Prof Chamberlain, 56, took the £8.5m project to Durham University to finish off after he was made master of a college there.

He said: "The waves can pass through a closed book but they are sensitive enough to see the writing on each page.

"I will be able to see through all kinds of materials and, unlike x-rays, terahertz release no harmful radiation. The technique has massive implications for health and security."

Prof Chamberlain, who has been working on the technology for more than 30 years, said: "This will soon be part of our everyday lives."