Patent ID: 8768037
Filing Date: 2014-07-01
Classification: A61B,G01N,G06K,G06T

Abstract:
1. A method for correcting image artifacts resulting from an anti scatter grid rigidly connected to an x-ray detector disposed on a C-arm of an x-ray device, comprising: recording a plurality of two-dimensional projection images of an object from different recording geometries using the x-ray device; recording a plurality of calibration images for each of the recording geometries respectively using the x-ray device; determining an average image from the calibration images using a control device; determining subtraction images for the each of the recording geometries by subtracting the average image from the corresponding calibration images respectively; smoothing the subtraction images by removing noise from the subtraction images; storing the smoothed subtraction images and the average image in the control device; determining correction images for the each of the recording geometries by adding the smoothed subtraction images assigned to the each of the recording geometries respectively with the average image; and correcting the recorded projection images based on the correction images.