描述ＣＴ图像质量有三个主要参数，分别为图像的空间分辨率、密度分辨率和噪声。在ＣＴ扫描和重建诸条件因素中，有许多供医生和操作员选择改变的因素，如ＣＴ的Ｘ线管电压、Ｘ线剂量（毫安秒）、扫描层厚、取样投影数、卷积滤波函数，还有与扫描野有关的放大倍数，与像素... Describing CT image quality has three main parameters, namely, the spatial resolution of the image, the density of the resolution and noise. Among CT scan and reconstruction conditions, there are many factors that doctors and operators can choose to change, such as CT X-ray tube voltage, X-ray dose (milliampere seconds), scan layer thickness, number of sample projections, convolution filter Function, as well as the scanning field-related magnification, and the pixel ...