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在数字X线摄影中,散射造成了图像对比度的下降,在影像增强器-电视链成像系统中,来自病人的散射和来向探测器系统的眩光更是恶化图像质量的主要原因。为了提高数字X线图像的质量,我们利用高斯曲线近似散射点扩展函数,并在一特定的系统上用实验的方法确定了散射量ρ和散射分布参数σ,然后构造一逆滤波器对用该系统获取的并经过富氏变换的数字胸部X线图像进行处理,处理过的结果图像用一可变加权因子进行校正,获得了一定的结果。本方法为解决数字X线图像中的散射校正问题提供了一种有效的手段。
In digital radiography, scattering causes a decrease in image contrast, and in image intensifier-TV-chain imaging systems, scattering from the patient and glare to the detector system are the major causes of image degradation. In order to improve the quality of digital X-ray images, we use Gaussian curve to approximate scattering point expansion function and experimentally determine the scattering quantity ρ and scattering distribution parameter σ on a specific system. Then, we construct an inverse filter pair The system acquired the Fourier transform digital chest X-ray images for processing, and processed the results of the image with a variable weight factor correction, obtained a certain result. The method provides an effective method for solving the scattering correction problem in digital X-ray images.