介绍了X射线图像增强器视频成像系统的结构和性能, 分析了影响成像质量的因素。转换屏和CCD成像系统响应的不一致性是影响检测灵敏度的主要因素; 而由于量子起伏、散射等造成的随机噪声也严重影响了成像质量。文中先对系统的不一致性进行模型校正, 再针对随机噪声进行递归滤波降噪, 与单一方法的噪声抑制相比, 有效地提高了系统的成像质量。

This article introduced the structure of an X-ray image intensifier video frequency imaging system and its performance, analyzed the influence factors on imaging quality. The non-uniformity of transformation screen and the CCD imaging system response was the primary factor to affect the examination sensitivity; The quantum fluctuation and the scattering-created stochastic noise also seriously influenced imaging quality. This article first used carries model of non-uniformity correction to the system, then applied the recursive filter noise reduction for the stochastic noise, resulting in an effective improvement on systems imaging quality as compared withe the sole denoising method.