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Dr Michael Andersen, a consultant radiologist and associate professor at the hospital, shows off a high-tech scanner, only the fourth of its kind used by any hospital around the world.

There have also been several cases in the US recently of alleged espionage by Chinese nationals, and scientists in particular have come under the scanner.

Extra security measures were put in place, including airport-style scanners outside Ashe, which caused huge queues for fans and pushed the match back.

"The scanner will enable shoppers to choose the avocado that is right for them and which therefore can help them plan their usage and desired shelf life," says Ms Lawrence.

Airport security scanners have been installed in some office entrances.