Method for correcting for beam hardening in a CT image
First Claim
1. A method for correcting for beam hardening in an initial CT image, composed of pixels arranged in a matrix, comprising the steps of:
- obtaining correction data from said initial image by re-projecting the pixels therein at a plurality of projection angles using only pixels from said initial image for each projection angle having a pixel value above a threshold value; and
producing a corrected image from said initial image using said correction data.
2 Assignments
0 Petitions
Accused Products
Abstract
A method for correcting for beam hardening in an initial CT image, which is composed of pixels arranged in a matrix, correction data are determined from the initial image by re-projection of the pixels from the initial image at a large number of projection angles, the pixels from the initial image being compared with a threshold value for each of the projection angles during the re-projection, and the re-projection being carried out for only those pixels from the initial image which have a pixel value above the threshold value. The correction data are used to determine a corrected image from the initial image.
-
Citations
5 Claims
-
1. A method for correcting for beam hardening in an initial CT image, composed of pixels arranged in a matrix, comprising the steps of:
-
obtaining correction data from said initial image by re-projecting the pixels therein at a plurality of projection angles using only pixels from said initial image for each projection angle having a pixel value above a threshold value; and
producing a corrected image from said initial image using said correction data. - View Dependent Claims (2, 3, 4, 5)
-
Specification