Analysis and Correction for Nonuniformity of the Two Side Proximity of X-ray Image Intensifier Radiography
双近贴式X射线像增强器成像不均匀性的分析与校正

By theoretical analysis of the cause for the two side proximity of X-ray image intensifier response non-uniformity,a mathematics model of each pixel channel was set up and an improved multi-point correction algorithm was presented.The nonlinear response data was transformed to linear response by the proposed algorithm and the two-point algorithm based on least-mean-square method was used to correct the image data.The standard deviations for images and the gray distributed curve were given before and after the correction.The non-uniformity correction capability of the presented solution was validated by experimental results.