Patent ID: 7215806
Filing Date: 2007-05-08
Classification: G06T

Abstract:
1. A method of performing bone correction on a computerized tomography (CT) image, comprising: A. generating a reconstructed CT image of a bone-containing portion of a patient's body, the reconstructed CT image including a bone region corresponding to the bone-containing portion; B. determining characteristics of the bone region of the image, wherein the bone region characteristics include at least one of a bone density value d and a bone area value s; and C. performing a bone correction procedure on the image, the bone correction procedure being performed at a gain that is determined based on the bone region characteristics wherein, if the bone region characteristics fall within a first threshold region of a grid having a first axis representative of the bone density value d and a second axis representative of the bone area value s, the gain in step C is a first gain setting of zero; wherein, if the bone region characteristics fall within a second threshold region of the grid, the gain in step C is a second gain setting of one; wherein, if the bone region characteristics do not fall within the first threshold region of the grid nor the second threshold region of the grid, the gain in step C is a third gain setting that is between zero and one; wherein the first, second and third gain settings are determined based on a relationship between (a) an intersection value of the bone density value d and the bone area value s and (b) the first and second threshold regions; wherein the first threshold region is defined by an area of the grid enclosed by a first threshold bond density value d wherein the second threshold region is an area of the grid defined by a ratio of a second threshold bone density value d wherein the third gain setting is determined based on the distance between an intersection point A of the determined bone density value d and the determined bone area value s and each of the first threshold region and the second threshold region; wherein the third gain setting is determined according to the equation: where D wherein the value of G