Patent ID: 6333990
Filing Date: 2001-12-25
Classification: A61B,G06T

Abstract:
A method of removing grid line artifacts from an x-ray image collected by a detector having an anti-scatter grid, said x-ray image having edgy regions, and high intensity regions, said method comprising the steps of:generating a gradient image and an intensity image from said x-ray image wherein the gradient image comprises said edgy regions and non-edgy regions and wherein the intensity image comprising said high intensity regions and low intensity regions;replacing said edgy regions with non edgy regions using said gradient image;replacing said high intensity regions with low intensity regions using said intensity image;converting said x-ray image to the Fourier transform domain; andeliminating grid line artifacts caused by said anti-scatter grid to form a modified x-ray image;converting said modified x-ray image to the inverse-Fourier transform domain to restore said modified x-ray image to a human readable format; andrestoring in said modified x-ray image each of said respective edgy regions and each of said respective high intensity regions.