【摘要】 锥束CT系统和二维扇束、平行束CT系统相比具有空间分辨率高、投影数据采集时间短、射线利用效率高等优点 ,但由于算法运算量大和工程实现上的困难以往一直没能在实际中应用 ,随着近几年硬件和算法的发展 ,锥束CT已经进入实用阶段 ,而平板探测器则是最适合锥束CT的探测器。本文对目前平板探测器锥束CT系统的发展状况做了综述 ,讨论了平板探测器用于锥束CT系统的优越性 ,对各种平板探测器锥束CT系统的几何结构和应用中的问题进行了比较和讨论 ,最后对平板探测器锥束CT未来的发展进行了展望。更多还原

【Abstract】 Compared with 2D fan-beam or parallel-beam CT, cone-beam CT system is able to achieve higher special resolution and better utilization of photons. It also requires less scan time. However, it had not come into practical application because of the difficulties in algorithms and technology. With the development of hardware and algorithms, cone-beam CT has become practical in recent years. Flat-panel detector is the best candidate for cone-beam CT. Here we discuss the advantage of flat-panel detector. Then we summarize the flat-panel cone-beam CT systems at present and make a discussion and comparison of them.更多还原