Patent ID: 9665950
Date: 2017-05-30
CPC Classifications: A61B,G01N,G06T,G21K

Claim:
1. An X-ray imaging system comprising: an X-ray imaging device with a Talbot interferometer or Talbot-Lau interferometer in which a plurality of gratings are disposed in a line in an X-ray emitting direction and which obtains moire fringe images by fringe scanning in which one of the gratings is moved relatively to the remaining grating, each of the gratings including a plurality of slits disposed in a direction perpendicular to the X-ray emitting direction; and an image processing device including a reconstruction unit which generates at least one of a differential phase image, an X-ray absorption image and a small-angle scattering image as a reconstructed image on the basis of the moire fringe images obtained by the X-ray imaging device, wherein the x-ray imaging device obtains multiple sets of moire fringe images by the fringe scanning multiple times between which arrangement of the gratings is changed, the reconstruction unit of the image processing device generates a reconstructed image on the basis of the sets of the moire fringe images obtained by the x-ray imaging device, and the image processing device further includes an estimation unit which estimates, on the basis of the reconstructed image generated by the reconstruction unit, a relative position of the moved grating from a reference position of the grating at each imaging in the fringe scanning.