Phase Contrast Filtering Model Based On X-ray Image Intensifier Imaging

X-ray nondestructive testing technology is one of the most widely used detection methods,which are compared with other nondestructive testing methods,it has the advantages of direct and high detection rate.However,the generation and transformation of rays are extremely quantum.Then it is affected by the modulation capability of the material,which leads to the large image noise and low contrast,which makes the imaging effect not ideal.It can not adapt to the development of industrial science and technology to the high requirement of detection accuracy.Therefore,based on the image intensifier imaging model,this paper proposes a phase contrast filtering model,which reduces the sensitivity of the detection system to X-ray quantum noise,and improves the quality of X-ray imaging.First,to highlight the effectiveness and superiority of the X-ray phase-contrast filter model.In this paper,X-ray semiconductor imaging device is used to set up the detection system.The effects of each unit on imaging resolution are analyzed from each subunit of the system,and combining image Fourier transform analyze the noise spectrum.Discovery that it is difficult to accurately analyze the imaging resolution ability of the system with a single model.Therefore,this paper proposes a system level joint evaluation model based on the evaluation principle of optical transfer function,and verifies the validity of the evaluation model through experimental data simulation.Then,from the point of view of material to ray modulation capability,the interaction between X-ray and material in nondestructive testing system and the imaging contrast of Xray are analyzed.For three kinds of aluminum,brass,stainless steel metal materials in different radiation doses of grating and the thickness difference under the condition of image acquisition,and combined with joint modulation system level evaluation model to explore the modulation effect of different material for X-ray.Indicated: under the same radiation dose.No matter what kind of material grating,the thickness difference is greater the imaging contrast is greater.But in the case of the same thickness difference,the variation trend of the modulation capability of different materials is very different with the change of the radiation dose.The 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.Finally,in terms of many constraints in X-ray imaging and weak wave-front modulation capability,From the Angle of making up the defect of single photon imaging and removing the noise and provide an integral filter model of X-ray imaging system.The image processing of the raster image is analyzed and compared with the traditional frame stack processing method,the reliability and superiority of the filter model are verified.From the point of view of improving the measurement of X-ray wave-front system.On the basis of image intensifier imaging model,an X-ray phase-contrast enhancement filtering model is proposed.The film benchmark target source is used for image acquisition.In the noise environment,the integration filtering and phase contrast enhancement processing are performed.It is shown that the image noise is suppressed while the target contour information is strengthened,and the contrast of X-ray images is greatly enhanced.This paper proposes a phase contrast filtering model based on the image intensifier imaging model.The advantages of the filter model are verified,which lays a foundation for the realization of real-time X-ray imaging detection system with high resolution,low noise and high contrast.