Correcting method for ring artifacts in fan-beam X-ray ICT

FU Jian; LU Hong-nian

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Correcting method for ring artifacts in fan-beam X-ray ICT

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- Correcting method for ring artifacts in fan-beam X-ray ICT
- Optics and Precision Engineering Vol. 10, Issue 6, Pages: 542-546(2002)
- 作者机构：
  
  北京航空航天大学, 机械工程及自动化学院北京,100083
- 作者简介：
- 基金信息：
- DOI：
  CLC： TP391.4
- Received：15 April 2002，
  
  Revised：31 October 2002，
  
  Published Online：15 December 2002，
  
  Published：15 December 2002
- 稿件说明：
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傅健, 路宏年. 扇束X射线ICT中环状伪影的一种校正方法[J]. 光学精密工程, 2002,(6): 542-546

FU Jian, LU Hong-nian. Correcting method for ring artifacts in fan-beam X-ray ICT[J]. Editorial Office of Optics and Precision Engineering, 2002,(6): 542-546
傅健, 路宏年. 扇束X射线ICT中环状伪影的一种校正方法[J]. 光学精密工程, 2002,(6): 542-546 DOI：

FU Jian, LU Hong-nian. Correcting method for ring artifacts in fan-beam X-ray ICT[J]. Editorial Office of Optics and Precision Engineering, 2002,(6): 542-546 DOI：

摘要

在扇束X射线ICT系统中

由于探测器响应不一致性

在重构图像上会引起环状伪影.为解决这个问题

提出了一类可以抑制探测器响应不一致性

从而能消除环状伪影的扫描采样方式;归纳、分析了这类扫描方式所必须满足的一个条件.计算机模拟和实验证明

在满足这个条件的扫描采样方式下

具有响应不一致性的探测器获取的投影数据无须任何额外的处理

即可使用相应的滤波反投影重构算法

重构出环状伪影显著减弱的图像.

Abstract

In a fan-beam X-ray ICT system

the non-uniform response of the detecting system could cause ring artifacts in image reconstruction. In order to mitigate this situation

a class of scan sampling patterns was proposed

which could suppress the non-uniform response and consequently decrease the ring artifacts. A condition

which this class of scan patterns must meet

is discussed. Computer simulation and experimental results show that the reconstruction of image with few ring artifacts

and without any other special disposal

could be generated with a filtered back-projection algorithm using those data sampled by the detecting system with non-uniform response under this kind of scan pattern.

关键词

Keywords

references

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