Phase Contrast Filtering Model Based on X-ray Image Intensifier Imaging
WANG He1,2,MU Yi-ning2,ZHANG Peng-fei3,ZHANG Lu3
1.College of Electric & Information, Jilin Communications Polytechnic, Changchun, Jilin 130130, China
2.College of Science, Changchun University of Science and Technology, Changchun, Jilin 130022, China
3.College ofOpto-Electronic Engineering, Changchun University of Science & Technology, Changchun, Jilin 130022, China
Abstract：The image acquisitions for the gratings made of aluminum, brass and stainless steel under different conditions of doses and thicknesses were carried out, combined with the system-level joint modulation evaluation model, the modulation effects of different materials on X-ray were studied, under the same radiation dose, no matter which kind of material was used, the difference in thickness is larger the imaging contrast is larger, in the case of the same thickness difference, the variation of the modulation ability of different materials with the radiation varies greatly with the change of the radiation dose. Three-dimensional curve fitting of optical modulation transfer function, X-ray dose and grating thickness difference was established, and the modulation model and acquisition model of the material on X-ray were established. A X-ray phase-contrast enhancement filtering model was proposed based on the image intensifier imaging model, in the noise environment, the integration filtering and phase contrast enhancement processing were performed, the image noise was suppressed while the target contour information was strengthened, and the contrast of X-ray images was greatly enhanced.
2018, Vol. 39 
