Patent ID: 7903860
Filing Date: 2011-03-08
Classification: G06T

Abstract:
1. A method for segmenting at least one substance in an x-ray image, comprising: acquiring two attenuation values relating to different energies of an x-radiation, in relation to each pixel; mapping the pixels of the x-ray image into a two-dimensional feature space on the basis of the acquired attenuation values, the feature space including at least one first classification region to which the at least one substance is uniquely assigned; determining the number of the pixels that are mapped into the classification region as an assessment variable, from the mapping into the feature space of an image environment of the x-ray image respectively assigned to the pixels, a size of the image environment being based on the at least one substance; and calculating a segmented image, by carrying out a threshold value comparison with a threshold value on the basis of the assessment variable relating to each pixel.