摘要
环形伪影是第三代CT常见故障,本文分析环形伪影形成的原因,证明了数据采集系统DAS每一道对图像的贡献主要是一个圆,给出了环形伪影半径和 DAS 故障道址的关系。
The ring artifacts are the common faults in third generation CT.The cause of the formation of the ringartifacts is analysed in this article.Our results reveal that the contribution of each channel of the dataacquisition system to CT images is mainly a circle.The relations between the radii of the ringartifacts and the troublesome channel addresses of the data acquisition system are given.
出处
《CT理论与应用研究（中英文）》
1992年第3期37-40,共4页
Computerized Tomography Theory and Applications
关键词
环形伪影
数据采集系统
故障道址
Ring artifacts
Data acquistion system
Troublesome channel address
