METHOD FOR DETERMINING A REGISTRATION BETWEEN A 3D IMAGE AND A SET OF AT LEAST TWO 2D IMAGES

摘要

Method for determining or updating a registration between a 3D image (1) of a region of interest (26) and a set of at least two 2D images (2, 3) of the same region of interest (26), wherein the 2D images (2, 3) are acquired using different imaging geometries, wherein the registration is described by a set of registration parameters, comprising the steps:- Selecting at least one respective contour point (4 - 7) in the 3D image (1) for each 2D image (2, 3),- Determining a 2D position (8 - 11) of a respective depiction of each contour point (4 - 7) in the respective 2D image (2, 3),- For each contour point (4 - 7) determining at least one condition for the registration parameters that needs to be fulfilled to map the respective contour point (4 - 7) to the respective 2D position (8 - 11) in the respective 2D image (2, 3),- Determining an updated set of registration parameters by solving a set of equations or an optimization problem that depends on the conditions.