X射线光栅相衬成像中保留源光栅的探测器校正方法  

Detector Correction Method Retaining Source Grating in Grating-based X-ray Phase-contrast Imaging

作　　者：胡仁芳[1] 冯大敏 吴朝[1] 高昆[1] 潘志云[1] 刘刚[1] HU Renfang;FENG Damin;WU Zhao;GAO Kun;PAN Zhiyun;LIU Gang(National Synchrotron Radiation Laboratory,University of Science and Technology of China,Hefei 230029,China)

机构地区：[1]中国科学技术大学国家同步辐射实验室,安徽合肥230029

出　　处：《原子能科学技术》2018年第1期150-155,共6页Atomic Energy Science and Technology

基　　金：国家重大科研装备研制项目资助(CZBZDYZ20140002);中央高校基本科研业务费专项资金资助项目(WK2310000065)

摘　　要：本文提出了一种X射线光栅相衬成像探测器校正方法,该方法无需移除靠近光源的源光栅,而是将其与光源作为一个整体参与增益校正。在基于几何投影的光栅相衬成像系统上,开展了利用传统的探测器校正与本文提出的探测器校正方法的对比实验,两种方法获得了一致的结果。实验结果表明,本文方法大幅简化了实验操作流程,提高了系统的稳定性,对于实现X射线相衬成像的临床应用有一定的推进意义。A detector correction method in grating-based X-ray phase-contrast imaging(GBPCI)was proposed in this paper.This method does not require to remove the source grating which is close to X-ray source,and considers the source grating and X-ray source as a unity in the gain correction.On the GBPCI setup based on geometric projection theory,the comparison experiment between the previous and the proposed detector correction method was performed,and the two methods obtained the same results.The experimental results show that the proposed method greatly simplifies the experimental operation and improves the stability of the system,which is of great significance for the clinical application of X-ray phase-contrast imaging.

关 键 词：X射线成像 光栅相衬成像 探测器校正 

分 类 号：TL99[核科学技术—核技术及应用]