Patent ID: 6851855
Filing Date: 2005-02-08
Classification: A61B

Abstract:
1. A registration method for a navigation-guided medical intervention comprising the steps of: using an X-ray imaging device, acquiring 2D projections of an X-ray calibration phantom, having X-ray positive marks, from different projection directions; reconstructing a volume of said X-ray calibration phantom from said 2D projections; determining respective coordinates of said X-ray positive marks, that are present in a measurement volume of said X-ray device and which are imaged in said reconstructed volume, in a coordinate system allocated to said measurement volume; determining coordinates of said X-ray positive marks that are present in said measurement volume and which are imaged in said reconstructed volume in a coordinate system allocated to a position acquisition system; and determining a coordinate transformation between said coordinate system allocated to said measurement volume and said coordinate system allocated to said position acquisition system from said coordinates of said X-ray positive marks in said coordinate system allocated to said measurement volume and said coordinates of said X-ray positive marks in said coordinate system allocated to said position acquisition system.