三结构各向同性包覆燃料颗粒相衬CT图像的噪声和伪像抑制方法初探  

Preliminary Study on Noise and Artifact Reduction in Phase-Contrast CT Image of Tristructural-Isotropic Coated Fuel Particle

作　　者：彭亚辉[1] 曹旭阳 陈后金[1] 李艳凤[1] 李居朋[1] 王贤刚[2] PENG Ya-hui;CAO Xu-yang;CHEN Hou-jin;LI Yan-feng;LI Ju-peng;WANG Xian-gang(Beijing Jiaotong University,Beijing 100044,China;Tsinghua University,Beijing 100086,China)

机构地区：[1]北京交通大学,北京100044 [2]清华大学,北京100086

出　　处：《电子学报》2019年第2期448-453,共6页Acta Electronica Sinica

基　　金：国家自然科学基金(No.11575095;No.61571262)

摘　　要：对三结构各向同性包覆燃料颗粒相衬CT图像的噪声和伪像抑制进行了初步探索,提出了三种方法分别抑制由探测器随机噪声、非线性漂移以及灵敏度非均匀性所导致的图像噪声或伪像.对抑制噪声或伪像前后的图像质量进行了主观评价以及定量分析,结果表明,本文提出的三种方法在有效抑制上述三种类型噪声或伪像的同时仍然能够保证重建图像中不同结构间边缘的清晰度.The purpose of the study was to reduce the noise and artifact in the phase-contrast computed tomography image of a tristructural-isotropic coated fuel particle.Three algorithms were proposed to reduce the noise and artifacts caused by the stochastic noise,non-linear drifting,and non-uniform sensitivity of the imaging detector,respectively.Subjective and quantitative evaluations were conducted before and after applying the algorithms.The results demonstrated that the proposed algorithms effectively reduced the three types of noise and artifacts,leaving the boundaries between different structures intact.

关 键 词：相衬计算机断层成像 三结构各向同性包覆燃料颗粒 噪声 伪像 抑制 

分 类 号：TP317.4[自动化与计算机技术—计算机软件与理论]