Patent ID: 6925140
Filing Date: 2005-08-02
Classification: A61B,G01N,G06T,H05G

Abstract:
1. A method for correcting for stray radiation in an X-ray computed tomography scanner comprising the steps of: irradiating a detector arrangement, composed of a multiplicity of detector elements arranged next to each other in a plurality of adjacent detector rows, with X-rays in a tomography measuring field of a computed tomography scanner; from each of said detector elements, obtaining a measured intensity value representing an intensity of X-rays incident thereon; obtaining at least one reference distribution of stray radiation intensity in a row direction of said detector arrangement and, for each of said measured intensity values, determining a stray radiation component thereof dependent on said at least one reference distribution; and for at least some of said detector rows, correcting the respective measured intensity values of the detector elements thereof as a function of the respective stray radiation components of those measured intensity values by recursion, including the steps of: