Patent ID: 7702477
Filing Date: 2010-04-20
Classification: A61B

Abstract:
1. Method for calibrating a spatial position and/or orientation of at least one surgical referencing unit of a surgical navigation system fitted with at least one inertial sensor in relation to a spatial coordinate system, comprising: providing a calibration unit, the position and/or orientation data of which are determinable in relation to the spatial coordinate system by the navigation system; bringing the calibration unit and the at least one referencing unit into a one-to-one defined position relative to one another; determining in the spatial coordinate system first calibration position and/or orientation data of the calibration unit in the defined position by means of the navigation system; calculating in the spatial coordinate system second calibration position and/or orientation data of the referencing unit in the defined position on the basis of the first calibration position and/or orientation data of the calibration unit, and assigning the second calibration position and/or orientation data calculated for the at least one referencing unit in the defined position to the at least one referencing unit as initial position and/or orientation data of the referencing unit in the spatial coordinate system.