Guido Rasi, executive director the European Medicines Agency (EMA) poses for a portrait at his office in London January 6, 2012. The new head of Europe's drugs watchdog said on Friday there was an acute need to tighten regulations on medical devices, adding to pressure for radical change in the wake of a global scandal over French-made breast implants. REUTERS/Finbarr O'Reilly (BRITAIN - Tags: BUSINESS HEALTH PORTRAIT)