首页 | 本学科首页   官方微博 | 高级检索  
     

锥束CT去除环形伪影的方法研究
引用本文:李化奇,杨迎春.锥束CT去除环形伪影的方法研究[J].电子测试,2011(11):17-20.
作者姓名:李化奇  杨迎春
作者单位:中北大学,电子测试技术国家重点实验室,太原030051
摘    要:环状伪影是CT技术人员经常遇到的影响重建图像质量的一种伪影,造成环形伪影的因素很多,其中探测器缺陷引起的环形伪影最为常见。环形伪影表现在原始图像结构上是圆环或者是圆弧,理论认证发现探测器响应效率不一致,会使锥束三维CT重建结果产生环形伪影。环形伪影影响了CT图像的分析和后续处理,因此去除环形伪影显得非常具有使用价值。本...

关 键 词:锥束CT  FDK算法  环形伪影  中值滤波

Method to remove the ring artifacts of cone-beam CT
Li Huanqi,Yang Yingchun.Method to remove the ring artifacts of cone-beam CT[J].Electronic Test,2011(11):17-20.
Authors:Li Huanqi  Yang Yingchun
Affiliation:Li Huanqi,Yang Yingchun (North University of China,National Key Laboratory For Electronic Measurement Technology,Taiyuan 030051,China)
Abstract:Ring artifacts are often encountered in CT technical staff,which affect the reconstructed image quality.There are many factors cause the ring artifacts, and the defect of detector is most common. The performance of ring artifacts in the structure of original images is ring or circular arc, and the non-uniformity in the response of detector elements will produce the ring artifacts in the cone beam CT reconstruction in theory. Ring artifacts affect the analysis of CT images and the Image-processing, so the removal of ring artifacts has very practical value. We propose a algorithms for artifact reduction based on the median filter.Compared to other algorithms,it can not only reduce ring artifacts better, but also protect the details of reconstructed images.
Keywords:cone-beam CT  FDK algorithm  ring artifacts  median filter
本文献已被 CNKI 维普 万方数据 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号