Patent ID: 9134259
Filing Date: 2015-09-15
Classification: A61B,G01N

Abstract:
1. An X-ray imaging system for imaging an object using X-ray, said system comprises: an X-ray source (S), a source grating (G 0 ), a fixed grating module (P) and an X-ray detector (T), which are successively positioned in the propagation direction of the X-ray; an object to be detected is positioned between the source grating and the fixed grating module; said source grating can perform stepping movement in a direction perpendicular to the optical path direction and grating stripes; wherein said system further comprises a computer workstation; said system is adapted for accomplishing the following processes: said source grating performs stepping movement in at least one period thereof; at each stepping step, the X-ray source emits X-ray to the object to be detected, and the detector receives the X-ray at the same time; wherein after at least one period of stepping and data acquisition, the light intensity of X-ray at each pixel point on the detector is represented as a light intensity curve; the light intensity curve at each pixel point on the detector is compared with a light intensity curve in the absence of the object to be detected, a pixel value of each pixel point is calculated from change in said light intensity curve; an image of the detected object is reconstructed according to the calculated pixel value.