A New Filter Function in CBP and Its Properties

FAN Hui-rong; XU Mao-lin; QIU Jun; ZHANG Zhao-tian; LI Xing-dong

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A New Filter Function in CBP and Its Properties

更新时间：2025-07-16

- A New Filter Function in CBP and Its Properties
- Acta Electronica Sinica Vol. 32, Issue 2, Pages: 232-235(2004)
- 作者机构：
  
  1. 北京信息工程学院应用数学研究室,北京,100101
  2. 国家自然科学基金委员会信息科学部,北京,100085
  3. 中国计量科学研究院,北京,100013
  4. 北京信息工程学院应用数学研究室北京,100101
  5. 国家自然科学基金委员会信息科学部北京,100085
  6. 中国计量科学研究院北京,100013
- 作者简介：
- 基金信息：
- DOI：
  CLC： TP391.41
- Published：2004
- 稿件说明：
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FAN Hui-rong, XU Mao-lin, QIU Jun, et al. A New Filter Function in CBP and Its Properties[J]. Acta Electronica Sinica, 2004, 32(2): 232-235.
DOI：

FAN Hui-rong, XU Mao-lin, QIU Jun, et al. A New Filter Function in CBP and Its Properties[J]. Acta Electronica Sinica, 2004, 32(2): 232-235. DOI：

摘要

用卷积反投影(CBP)算法作CT重建

滤波函数是关键.本文建议一种新型滤波函数

给出了用它作CT重建的误差估计

分析了该滤波函数的时频特性

并用来作局部重建.模拟和实测数据的数字实验表明其在保证空间分辨率的同时能较好地克服Gibbs效应.

Abstract

Filter function is the key point of CT convolution backprojection.This paper suggests a new filter function and gives the estimates of CBP

and the analysis of the time-frequency character.By the filter

Local tomography is implemented.The reconstruction results of simulation and experimental projection data show that this filter can improve Gibbs effects without decreasing the resolution of the images.

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