04217641 is referenced by 49 patents and cites 6 patents.

A method and apparatus which corrects the polychromatic distortion of CT images which 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 poloychromatic distortion.

Title
Correction for polychromatic X-ray distortion in CT images
Application Number
5/901212
Publication Number
4217641
Application Date
April 28, 1978
Publication Date
August 12, 1980
Inventor
Abraham Naparstek
Shelton
CT, US
Agent
Jack E Haken
William J Streeter
Thomas A Briody
Assignee
U S Philips Corporation
NY, US
IPC
G01T 1/16
G01N 23/00
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