Patent ID: 7356172
Filing Date: 2008-04-08
Classification: G06T

Abstract:
1. A method for tracking motion in a medical imaging system, comprising: creating a collection of landmarks, each landmark corresponding to a set of pixels representing an area or volume region with an at least two-dimensional outline; and tracking motion from a first image to a second image using a cost function of two or more variables, the cost function defined over members of the collection and including a geometric relationship between the members of the collection, the cost function subject to at least two constraints, the cost function being a function of a fit of each set of pixels for the area or volume region in the first image to a search space in the second image, the fit corresponding to a correlation, sum of absolute difference, sum of square difference, maximum likelihood, or metric measuring similarity between the set of pixels and the search space and corresponding to selecting as a function of different possible fits.