Patent ID: 7912271
Filing Date: 2011-03-22
Classification: A61B,Y10S

Abstract:
1. A method for determining final projection matrices, comprising: capturing a plurality of projection images via a recording arrangement with corresponding positioning of the recording arrangement; receiving by a computer a plurality of groups of projection images of a reference object already known to the computer; determining an interim projection matrix via one of the plurality of projection images for the respective position of the recording arrangement, where the interim projection matrix describes a mapping of the three-dimensional space to a projection image captured with respective positioning of the recording arrangement and being related to a coordinate system; assigning a specific coordinate system to each groups of projection images; determining locations of the other coordinate systems related to one of the coordinate systems by the computer using interim projection matrices of different groups determined for the same position of the recording arrangement; and defining the final projection matrix by the computer using the interim projection matrices and the locations of other coordinate systems for each position of the recording arrangement, wherein the final projection matrices relate to a uniform coordinate system.