Patent ID: 8073099

Claim:
A differential interference phase-contrast X-ray imaging system comprising: an X-ray tube comprising parallel arrayed linear X-ray emitters with emission angle of 30-50 degree, which can generate a coherent hard X-ray; an X-ray filter; an object platform; an X-ray phase grating; an X-ray detector with the functions of detection and analysis including parallel arrayed X-ray scintillator screen, light coupling system and visible light area detector or parallel arrayed photoconductive x-ray detector, wherein the X-ray scintillator screen has one dimensional periodicity configured to detect the interferogram of the x-ray phase grating, wherein the X-ray scintillator screen has a periodic structure consisting of a banded X-ray sensitive area and a banded X-ray insensitive area in one periodicity, wherein the insensitive band is perpendicular to the periodic structure is made of material insensitive to X-rays, and the sensitive hand filled by fluorescent material of incident X-ray is divided into rectangle array of pixels by X-ray insensitive material in the directionâ€”perpendicular to the periodic structure, wherein the insensitive material including semiconducting material of silicon, germanium or aluminous metal, stainless steel or glass, and the pixel area is filled with fluorescent material selected from the group consisting of CsI:Tl, CsI:Na or Gd 2 O 2 S:Tb which can emit visible light or near infrared wave when excited by X-ray.