Detail-preserving ring artifact correction method for cone-beam CT
作者机构：中北大学仪器科学与动态测试教育部重点实验室山西太原030051 中北大学信息与通信工程学院山西太原030051
基 金：National Natural Science Foundation of China(No.6171177) National Key Scientific Instrument and Equipment Development Project(No.2013YQ240803)
出 版 物：《Journal of Measurement Science and Instrumentation》 (测试科学与仪器（英文版）)
年 卷 期：2016年第7卷第2期
页 码：165-170页
摘 要：Ring artifact is the major factor that seriously influence quality of computed tomography(CT)image reconstruction,especially in testing large-scale *** remove ring artifact quickly and efficiently,a kind of ring artifact correction method is improved based on the post-processing CT image reconstruction in this *** first,transform the CT image from the rectangular coordinates into polar ***,design multidimensional filter to filter the image and calculate the mean and variance of each filtered pixel in polar *** location of artifact point is determined by the double *** is the comparison of calculated variance and variance threshold,and another is the comparison of pixel value and pixel value ***,process the artifact points in a reasonable manner and do details remain to CT image in *** last,convert corrected polar image into rectangular *** actual experiment shows that compared with the original method,improved method can better correct the ring artifacts and keep the image details for CT *** is a kind of practical ring artifact correction methods for subsequent processing and quantitative analysis.
主 题 词：cone beam computed tomography(CT) Feldkamp-Davis-Kress(FDK)algorithm ring artifacts detail-preserving
学科分类：08[工学] 080203[080203] 0802[工学-机械学]
核心收录：
D O I：10.3969/j.issn.1674-8042.2016.02.012
馆 藏 号：203187145...
