一种新的二维CT扫描方式及其重建算法  

New scan mode for 2D-CT and its reconstruction algorithm

作　　者：赵飞[1] 路宏年[1] 孙翠丽[1] 

机构地区：[1]北京航空航天大学机械工程及自动化学院,北京100083

出　　处：《光学技术》2006年第2期284-286,289,共4页Optical Technique

摘　　要：介绍了一种二维CT扫描方式及其重建算法。它是一种利用近轴X光线,针对大型回转试件的二维CT检测方法。被扫描试件依次绕与探测器平行的多个旋转中心各旋转一周。在旋转过程中,射线源在周向均布的多个角位置发射射线,同时探测器接收射线并记录投影数据。同传统的二代CT相比,对一个具体例子的计算表明,它可以节约3/4的扫描时间。计算机仿真表明了这种扫描方式和重建算法的可行性。A 2D-CT scan mode and its reconstruction algorithm, which can scan large-sized work pieces are introduced with paraxial X-ray beam. Work pieces to be tested were in turn rotated a circle by centers, which lined up parallel to the detector. During rotation, X-ray was at circumferentially equi-spaced positions, and data were saved at the same time. Comparing with the second generation scan mode by an example, it can save the scan time about 3/4. The computer simulation indicates the possibility of this scan mode and its reconstruction algorithm.

关 键 词：工业CT 射线检测 扫描 大型试件 

分 类 号：TP391[自动化与计算机技术—计算机应用技术] TH878[自动化与计算机技术—计算机科学与技术]