Abstract: The FBP local algorithm on the base FBP was presented for the small fan X-ray CT so as to improve the testing efficiency for the fault of SRM, which was used to implement local tomography by data of region-of-interest (ROI) of SRM. It is the same as whole image reconstruction that the image of local tomography is sharpen and has high special resolution for crack of SRM. It was suggested that the FBP local tomography algorithm should be widely used.

Key words: Solid propellant rocket engine;Filtering;Projection;Data sampling;Image

摘要： 针对小张角扇形射线束CT的特点及提高固体火箭发动机缺陷检测效率,本文在滤波反投影(FBP)算法的基础上,提出了局部区域的图像重建方法,采用感兴趣的局部区域(ROI)的采样数据,实现了固体火箭发动机局部图像重建。与整体图像重建算法一样,FBP局部重建的图像清晰,缺陷分辨率高,重建速度快,具有很好的应用价值。

关键词: 固体推进剂火箭发动机;滤波;投影;数据取样;图像