用于双能CT的小型单能量X射线源的开发

The Development of Compact Single Energy X-ray Source for Dual-energy CT

介绍了一种可用于双能CT的小型单能量X射线源。为了获得稳定的X射线,采用X波段(11.424 GHz)直线加速器加速的多束团电子和Q开关Nd:YAG激光的组合。为了提高X射线通量,采用了激光束循环系统。阐述了双能CT成像、激光束循环的原理和小型单能量X射线源的工作原理。说明了目前系统的构建状况和实验实施状况,并对当前存在的问题和今后的课题做出总结。

A Compton scattering X-ray source which can be used for dual -energy CT is introduced .In order to realize stable X-ray generation, multi-bunch electron beam from an X -band （11.424 GHz） linac and Q-switch Nd：YAG laser are adopted .And in order to increase X-ray flux, a laser circulation system is adopt-ed.The principle of dual energy CT imaging , laser circulation and compact dual -energy X-ray source are described.The current status of system construction and the experiments are also illustrated .Finally, a summa-ry of current problems and future research are made .