Patent ID: 7555151
Filing Date: 2009-06-30
Classification: A61B,G06K,G06T,Y10S

Abstract:
1. A method for tracking 3-dimensional (3D) motion of a deformable shape of a candidate anatomical structure across a sequence of three dimensional (3D) images the method comprising the steps of: specifying a plurality of landmark points on a deformable shape of a candidate anatomical structure in a present 3D image of said structure, wherein the landmark points are distributed evenly on said deformable shape; defining a 3D cuboid around at least one 3D landmark point; computing a Jacobian matrix from a temporal gradient between the present image and a reference images; computing motion parameters from said Jacobian matrix and present and reference image values in said cuboid; warping the cuboid in the reference image according to the motion parameters, and redefining the warped image to be the reference image; repeating said steps of computing a temporal gradient and a Jacobian matrix, computing motion parameters, and warping the reference image until convergence; and using the motion parameters to track 3D motion of the anatomical structure.