束中放疗加速器多叶光栅控制系统设计  

Design of MLC's control system for IORT accelerators

作　　者：杜锡九 蒋舸扬[2] 叶斌 陈广花[2] 陈建锋[2] 沈立人[2] 

机构地区：[1]广东中能加速器科技有限公司,东莞523000 [2]中国科学院上海应用物理研究所嘉定园区,上海201800

出　　处：《核技术》2015年第9期57-61,共5页Nuclear Techniques

基　　金：广东省引进创新科研团队计划(No.201001D0104732255)资助

摘　　要：多叶光栅是现代医用加速器的重要组成部分之一,其控制系统的稳定性和精确度直接影响手术中病人的生命安全。但目前国内的多叶光栅无论在稳定性还是在精确度上仍与世界先进水平相差甚远。为满足国内一台术中治疗加速器的研发需要,我们在传统多叶光栅控制基础上,利用可编程片上系统(System-on-aProgrammable-Chip,SOPC)技术对多叶光栅控制系统进行了软硬件重构,通过增加功能模块和改善电磁辐射防护等手段,研制了符合术中治疗加速器功能需求和机械安装尺寸的基于现场可编程门阵列(Field-Programmable Gate Array,FPGA)芯片的全新控制系统。经测试,该控制系统功能完善,双路位置反馈可靠性高,测试结果满足国家现行对于多叶光栅系统性能要求,为术中治疗加速器的研制提供了可靠保证。Background： The multi-leaf collimator （MLC） is one of key components of modem medical accelerators for Intra-operative Radiation Therapy （IORT）. The stability and accuracy of MLC＇s control system will insure patients＇ life security during radiation therapy. Comparing with the world＇s top level, domestic MLC technologies falls behind not only in stability but also in accuracy. Purpose： This study aims to design a MLC control system satisfying the requirements of developing the first domestic IORT accelerator and closing the gap with the world advanced level. Methods： The MLC control system was reconfigurated by the System-on-a-Programmable-Chip （SOPC） technique based on the traditional MLC control system. By adding new function model, preventing Electromagnetic Interference （EMI） and other ways, the newly developed MLC control system can fulfill IORT accelerator＇s function and mechanical installation requirements. Results and Conclusion： The test results show that the control system possess properties of full functionalities, redundant position feedback, conformity to national standards of medical instruments and insuring the R＆D of IORT accelerator.

关 键 词：多叶光栅 粒子加速器 现场可编程门阵列 LABVIEW 

分 类 号：TL99[核科学技术—核技术及应用]