Patent ID: 9439613
Filing Date: 2016-09-13
CPC Classification: A61B,G01N,G02B,G06K,G21K

Claim Text:
1. A differential phase contrast X-ray imaging system comprising: an X-ray illumination system; a beam splitter grating arranged in a radiation path of the X-ray illumination system and operable to receive an incident X-ray beam and provide an interference pattern of X-rays; a detector system arranged in a radiation path to detect X-rays after passing through the beam splitter grating and in a Talbot-Lau interferometer configuration with the beam splitter grating, wherein the detector system comprises a X-ray detector and an analyzer grating, wherein the analyzer grating comprises a plurality of sub-gratings arranged on a common substrate, the plurality of gratings including an edge sub-grating and a central sub-grating, wherein the edge sub-grating is tilted at an angle to the central sub-grating, wherein the analyzer grating is operable to intercept and block at least a portion of the interference pattern of X-rays before reaching the X-ray detector; a rotation stage operable to rotate the X-ray illumination system, the beam splitter grating, and the detection system about an object; wherein the beam splitter grating and the analyzer grating are arranged at a shallow angle relative to a plane characterized by a direction of the incident X-ray beam, wherein the shallow angle is less than 30° and wherein the detector is operable to capture a single image for each angle at which the rotation stage is rotated.