CT理论与应用研究2012，Vol.21Issue(2)：247-254,8.
一种基于空气扫描的锥束CT环形伪影校正方法
Ring Artifact Correction Method Based on Air Scan for Cone-beam CT
摘要
Abstract
On the basis of analysis of flat panel detector correction methods and the residual causes of ring artifacts in cone-beam CT（CBCT）,a simple correction method for CBCT ring artifacts based on air scan is proposed.Firstly,an air scan and measured object scan are performed using the same parameters in the same CBCT system.And then a series of slice images are reconstructed,respectively.Finally,the air slice images are subtracted from the corresponding slice images of the measured object to achieve the correction of the residual ring artifacts,at the same time playing a certain role in noise reduction.Experimental results demonstrate the feasibility and effectiveness of this method.关键词
锥束CT/平板探测器/环形伪影/空气扫描Key words
cone-beam CT(CBCT)/flat panel detector/ring artifact/air scan分类
信息技术与安全科学引用本文复制引用
张华,黄魁东,史仪凯,李明君..一种基于空气扫描的锥束CT环形伪影校正方法[J].CT理论与应用研究,2012,21(2):247-254,8.基金项目
国家自然科学基金 （）
国家科技重大专项 （）
西北工业大学基础研究基金 （）
