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Making a real sonic screwdriver

19 April 2012 Last updated at 15:26 BST

It is the stuff of science fiction or rather it was.

Doctor Who's sonic screwdriver has saved him from his alien enemies throughout the universe.

A team of physicists at Dundee University have designed and built their own sonic screwdriver.

As Andrew Anderson reports, it is hoped it will help in complex ultrasound surgery.