Image quality of cone beam CT on respiratory motion

作     者：ZHANG Ke LI Minghui DAI Jianrong WANG Shi 

作者机构：Department of Radiation Oncology Cancer Institute (Hospital) Chinese Academy of Medical Sciences Beijing 100021 China Department of Engineering Physics Tsinghua University Beijing 100084 China 

出 版 物：《Nuclear Science and Techniques》 (核技术（英文）)

年 卷 期：2011年第22卷第2期

页      面：111-117页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 07[理学] 08[工学] 080203[工学-机械设计及理论] 09[农学] 0903[农学-农业资源与环境] 0802[工学-机械工程] 0713[理学-生态学] 

基　　金：Supported by National Natural Science Foundation of China(Grant No.10975187)and clinic research grant(No.LC2009B34)from the Cancer Institute 

主　　题：呼吸运动 图像质量 锥束CT 模拟平台 质量指标 空间分辨率 运动状态 低对比度 

摘      要：In this study,the influence of respiratory motion on Cone Beam CT (CBCT) image quality was investigated by a motion simulating platform,an image quality phantom,and a kV X-ray CBCT.A total of 21 motion states in the superior-inferior direction and the anterior-posterior direction,separately or together,was simulated by considering different respiration amplitudes,periods and *** influence of motion on CBCT image quality was evaluated with the quality indexes of low contrast visibility,geometric accuracy,spatial resolution and uniformity of CT *** results showed that the quality indexes were affected by the motion more prominently in AP direction than in SI direction,and the image quality was affected by the respiration amplitude more prominently than the respiration period and the *** CBCT image quality and its characteristics influenced by the respiration motion,and may be exploited in finding solutions.