Correction for polychromatic aberration in ct images

Details Correction for polychromatic aberration in ct images Correction for polychromatic aberration in ct images

H - Electricity

05

G

358/11.1

H05G 1/00 (2006.01) A61B 6/03 (2006.01) G06T 11/00 (2006.01)

Patent

CA 1124890

Abstract A method and apparatus which corrects the polychromatic aberration in CT images, which aberration is produced by the non-linear interaction of body constituents with a polychromatic X-ray beam. A CT image is processed to estimate the proportion of the attenuation coefficients of the constituents in each pixel element. A multiplicity of projections for each constituent are generated from the original image and are combined utilizing a multidimensional polynomial which approximates the non-linear interaction involved. An error image is then generated from the combined projections and is subtracted from the original image to correct for the polychromatic distortion.

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