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Margallo Balbas, E. (author), Wieringa, P.A. (author), French, P.J. (author), Lee, R.A. (author), Breedveld, P. (author)Surgical drill system comprising a mechanical drill bit and means for imaging the vicinity of the drill bit tip, said means comprising: at least one optical fiber having a distal end and a proximal end, said distal end being located adjacent said drill bit tip, an optical processing unit, said proximal end of said at least one optical fiber...patent 2007