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Southampton scanner maps problem hip replacements

20 February 2013 Last updated at 11:54 GMT

A new way of testing hip joints that have failed is being pioneered in Southampton.

About 5,000 patients in the area have metal joints - and some have had to be replaced because they have caused pain and problems.

Now those joints are being examined using a new scanning machine to find out what went wrong.

BBC South's health correspondent David Fenton reports.