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X射线影像的质量复杂地受着X射线管焦点、增感纸、胶片、散射线屏蔽,被摄物体的X射线吸收散射以及运动、摄影系统的几何学条件(放大系数)、X射线条件(KV、mA、Sec)等种种因素的影响。医师和技术人员根据长年的研究和经验,通过适当的选择这些因素,进行了获得优质照片的努力。本文用MTF(响应函数)分析了这些基本因素,进一步引入与被摄物体散射线相关的Xc因素和综合反差的概念评价影像质量。根据这些结果,介绍了适于X射线摄影系统的CIRCLEX旋转阳极X射线管的新系列。
The quality of X-ray images is complicated by X-ray tube focus, sensitization paper, film, scattered ray shielding, X-ray absorption scattering and motion of the subject, geometrical conditions of the photographic system (magnification factor), X-ray conditions KV, mA, Sec) and other factors. Based on years of research and experience, physicians and technicians have made good efforts to obtain high-quality photos by appropriately selecting these factors. In this paper, we use MTF (Response Function) to analyze these basic factors and further introduce the concept of Xc factor and comprehensive contrast related to the scattering line of the object to evaluate the image quality. Based on these results, a new series of CIRCLEX X-ray tube for X-ray photography is introduced.