Patent ID: 6776526
Filing Date: 2004-08-17
Classification: A61B

Abstract:
A method for calibrating x-ray image data for medical navigation, comprising the following steps:providing a calibration instrument that is adapted to be positionally detected and tracked by a medical navigation system and has a plurality of localization structures that are detectable in x-ray images and are arranged on at least two spaced supports; producing an x-ray image without a patient of the plurality of localization structures on the calibration instrument while the instrument is tracked by a medical navigation system; registering the x-ray image without a patient in the navigation system using the plurality of localization structures; removing at least one of the spaced supports, together with its localization structures, from the calibration instrument; producing an x-ray image of a patient together with the calibration instrument with at least one support removed; comparing the x-ray images of the calibration instrument to determine whether there is sufficient correspondence of the plurality of localization structures visible in the images.