AUTOMATIC CALIBRATION SYSTEM FOR COMPUTER-AIDED SURGICAL INSTRUMENTS

摘要

A system for automatic calibration of instruments (S) having varying cross-sectional dimensions within a predetermined range and having detectable elements ( 110, 112, 113, 114 ) thereon for computer-aided surgery, comprising a calibration base (C) having detectable elements ( 43, 44, 46, 48 ) secured thereto for detecting a position and an orientation thereof in space by sensors ( 204 ) connected to a position calculator ( 202 ). The calibration base is adapted to receive and to releasably secure a working shaft ( 100 ) of any of the instruments (S) and provides an abutting surface ( 14 ) for a tip ( 102 ) thereof in such a way that a position and orientation of the tip ( 102 ) of the instrument (S) secured therein is calculable when working shaft cross-section dimensions thereof are known. The position calculator ( 202 ) receives instrument data ( 214 ) and calibration data ( 218 ) from an operator through a user interface ( 206 ) and stores the instrument data ( 214 ) and calibration data ( 218 ) for subsequent calibrations.