工业CT作为一种先进的无损检测技术，应用范围已越来越广泛。目前在用的工业CT系统已有数百套，这些工业CT因为硬件配备的不同，工艺参数也有很大差别。现行的工业CT标准中对主要工艺参数的取值给出了指导性原则，但没有给出定量取值方法而导致操作不便。从检测需求出发，依据采样理论分别给出了主要参数的取值公式，方便了CT检测工艺的编写，并用实例给出了操作过程，并对方法的正确性进行了验证。

As an advanced nondestructive testing technology, the application of industrial CT has become increasingly widespread. There are hundreds of industrial CT systems currently in use. If the industrial CT hardware equipment is different, the corresponding process parameters are also very different. Although the current industrial CT standards in the main process parameters provide guide lines for selection principles, they do not give a quantitative selection method and hence the operation is inconvenient. Based on the sampling theory, this paper gives the formula of the main parameters, which greatly facilitates the preparation of the CT detection process. The operation procedure is given by examples and the correctness of the method is verified.