工业CT扫描和重建给出的是与试件几何结构、材料组分及密度特性相对应的断层图象,成象直观,容易为人们接受和理解。但作为一种成象检测技术,工业CT是很复杂的。CT扫描时,射线能量束、探测器阵列和成象平面均处于同一平面,而其它成象技术能量束与成象平面相互垂直。工业CT成象要经过大量的数学运算及复杂的技术过程,最终图象受设备、工艺等多方面因素影响。为得到高质量的CT扫描图象,并进行正确分析和表征,需要对工业CT图象知识有全面了解。本文介绍上业CT图象的一般特点,描述图象质量 Industrial CT scanning and reconstruction gives tomographic images corresponding to the geometry, material composition and density characteristics of the test specimen. Imaging is intuitive and easily accepted and understood. However, as a kind of imaging detection technology, industrial CT is very complicated. In CT scanning, the beam of rays, the array of detectors and the imaging plane are all on the same plane, while the beams of the other imaging techniques are perpendicular to the imaging plane. Industrial CT imaging to go through a large number of mathematical operations and complex technical process, the final image by equipment, technology and other factors. In order to obtain high-quality CT scan images and to properly analyze and characterize them, a thorough knowledge of industrial CT images is required. This article describes the general characteristics of the industry CT images, describing the image quality