工业CT伪像的产生原因和影响规律分析  

Analysis on the causes and influencing laws of industrial CT artifacts

作　　者：丛龙丹 邹昱临 施美圆 刘一斐 计益利 CONG Longdan;ZOU Yulin;SHI Meiyuan;LIU Yifei;JI Yili(Shanghai Aircraft Manufacturing Co.,Ltd.,shanghai 201324,China)

机构地区：[1]上海飞机制造有限公司,上海201324

出　　处：《无损检测》2024年第9期17-21,共5页Nondestructive Testing

摘　　要：伪像是工业CT检测图像上必不可少的存在,有些伪像在CT物理学和数学中是固有、不可消除的,有些伪像可通过改变工艺参数来减弱或消除。通过伪像参考试件,介绍了几种工业CT检测图像中常见伪像的产生原因,并将参数进行调整以减弱伪像的影响。试验结果表明,工业CT伪像的产生原因与滤波片、放大倍数、采样张数、旋转中心校准、软件校正及被检样品夹具等因素有关。Artifacts are essential in industrial CT images.Some artifacts are inherent and cannot be eliminated in CT physics and mathematics,while others can be weakened or eliminated by changing process parameters.Therefore,the authors introduced the causes of several common artifacts in industrial CT images by using artifact reference block,and reduced the influence of artifacts by adjusting parameters.The results showed that the causes of artifacts in industrial CT were related to factors such as filters,magnification,number of sampling sheets,calibration of rotation centers,software calibration,and fixtures for the tested samples.

关 键 词：伪像 工业CT 参考试件 射线照相 

分 类 号：TG115.28[金属学及工艺—物理冶金]