一种基于投影变换的旋转型CL重建算法

基金项目:

国家自然科学基金（61372172）；国家自然科学基金（61601518）。

详细信息

A Novel Reconstruction Algorithm Based-on Projection Transformation for the Rotational Cone-beam CL

Information System Engineering College, Information Engineering University, Zhengzhou 450002, China

摘要: 相对于传统计算机断层成像(CT),计算机层析成像(CL)对于扁平状物体的检测具有独特的优势。旋转型CL不严格满足滤波反投影(FBP)算法的条件,针对这一问题本文提出了一种基于投影变换的旋转型CL FBP重建算法。首先介绍了旋转型CL的扫描结构;然后阐述了该结构下投影的生成方法及基于投影变换的投影数据重构方法;最后利用重构后投影数据进行滤波反投影,并通过仿真重建实验验证了算法的有效性。
- CT /
- 旋转型CL /
- FBP /
- 投影变换
Abstract: Computed Laminography (CL) has a unique advantage over CT for flat objects. However, the rotational CL does not satisfy the conditions of the filtered back-projection (FBP) reconstruction algorithm. This paper proposes a novel FBP reconstruction algorithm based on projection transformation for the rotational cone-beam CL. Firstly, the structure of the rotational CL is introduced; Secondly, the way generating projections and the method rearranging the data are elaborated; Lastly, the data rearranged is applied to filter and back projection, and the simulations of reconstruction prove that the method of this paper is effective.
- CT /
- rotational CL /
- FBP /
- projection transform