三维锥束代数重建算法的投影排序方案

基金项目:

国家自然科学基金(60532080,60772102)

详细信息

The Projection Ordering Scheme of Three-dimensional Cone-beam for ART

摘要: 代数重建算法中的投影访问顺序对重建图像的收敛速度和精度有很大的影响。针对三维锥束代数重建算法,比较了几种投影序列排序方案的重建图像收敛速度:顺序访问方案,多水平级排序方案,素数分解排序方案,加权距离排序方案。通过仿真实验得到的实验结果表明:在三维锥束ART算法中按照后三种投影序列排序方案排序后的图像重建比顺序访问方案的收敛速度快,并且WDS排序方案的收敛速度最好。
- 代数重建算法 /
- 投影序列排序 /
- 图像重建 /
- 加权距离 /
- 质数分解 /
- 多水平级排序
Abstract: The order of the applied projections in Algebraic Reconstruction Technique(ART) has a great effect on speed of convergence and accuracy in reconstructed image.In 3D cone-beam ART,some schemes of the sort of the projection sequence are compared in the paper.The schemes are listed below:Sequence Access(SAS),Multilevel(MLS),Prime Number Decomposition(PND),and Weighted Distance(WDS).The experiment results got by simulation experiment show that the speed of convergence on which reconstructed image by MLS,PND and WDS is more quick than by SAS,and the WDS is the best one in three sort schemes.
- ART /
- the order of projection sequence /
- image reconstruction /
- weighted distance /
- prime number decomposition /
- multilevel