扇束CT中短扫描方式下数据重排技术的研究与实现

基金项目:

河南省基础与前沿技术研究计划项目(072300450240)

详细信息

The Research and Realization of a Re-Sorting Algorithm Used in Fan-Beam CT Short-Scan Reconstruction

Institute of Information Engineering, Information Engineering University, Zhengzhou 450002, China

摘要: 根据平行束和扇束CT中的主要重建机制与原理,阐述了两种算法在计算机上的实现方法和特点。传统扇束CT通常采用的是基于一周360°的全扫描方式,为了加快扫描速度,提高重建效率,在分析了扇束和平行束在几何上的关联性后,介绍一种不完全角度的扫描方式——短扫描,以及应用于该种扫描方式下的数据重排技术,并完成了算法的实现。通过实验结果我们发现改进后的算法在速度上得到显著提高。
- CT重建 /
- 扇束 /
- 短扫描 /
- 数据平行重排
Abstract: This paper reviews two main categories of reconstruction algorithms in parallel CT and fan-beam CT,and introduces the approachs to implement them on PC.In order to speed up CT scan and reconstruction,based on the analysis of the beam geometries relationship between parallel scan and fan-beam scan,the paper introduces a special scan model named short-scan which differ from traditional full-scan,and proposes an approach named parallel re-sorting to reconstructing images from short-scan fan-beam data.And then realizes it.According to experimental results,we find that reconstruction speed is improved remarkably.
- CT reconstruction /
- fan-beam /
- short-scan /
- data parallel re-sorting