摘要
CT作为可以检测物体内部信息的一种成像方法在无损检测中发挥重要作用。越来越多的无损检测人员开始使用CT这种方式进行无损探伤和逆向工程的工作。由于有限的探测器大小,普通CT可以扫描的物体尺寸较小,这限制了CT的使用范围。本文分析了传统的大视场重建方法的特点和不足之处,提出了一种新型的锥束大视场CT重建方法。该方法对于CT重建来说提供了更大的视场。理论上,对于被检物体的大小没有限制。
CT is playing an important role in detecting inner structure of an object. More and more NDT professionals are using CT in NDT or reverse engineering. Due to limited detector size,the size of object which can be scanned by ordinary CT is small which limits CT usage. This article analyses the characteristics and disadvantages of the classical large field CT imaging and introduces a new type cone beam large field CT reconstruction method. This method introduced in this article provides larger field for CT reconstruction. Theoretically there is no limit for the size of object scanned by CT.
出处
《中国体视学与图像分析》
2017年第3期314-319,共6页
Chinese Journal of Stereology and Image Analysis
关键词
图像拼接
FDK重建
大视场
无损检测
image mosaic
FDK reconstruction
large field
nondestructive testing
