Patent ID: 6052611
Filing Date: 2000-04-18
Classification: A61B

Abstract:
A frameless stereotactic surgical apparatus comprising:an imaging device defining a coordinate system in scanner space .PI., the imaging device being adapted to receive a patient body thereon and generate first patient body image information in image space regarding the patient body located in said scanner space .PI.;a localizer device having a base portion mounted in a fixed relationship to the imaging device and a free end adapted for selective movement into varied positions adjacent the patient body disposed in said scanner space .PI.;a position transducer associated with the localizer device to generate, in a localizer space , first tip location information of said free end of the localizer device relative to the base portion of the localizer device; and,a first transform processor adapted to generate a localizer space to scanner space transform vector based on a difference between a first centroid developed in said localizer space and a second centroid developed in said scanner space .PI. and to convert said first tip location information in said localizer space to first converted tip location information of said free end of the localizer device in at least a one of said scanner space .PI. and said image space using said localizer space to scanner space transform vector.