摘要
医用重离子加速器(Heavy-Ion Medical Machine,HIMM)中安装在束正电子发射断层扫描装置(In-beam Positron Emission Tomography,In-beam PET)可实现治疗时对肿瘤靶区的照射剂量和位置分布的实时监测功能。在束PET工作时,事件经探测器阵列采集,由前端数据获取单元(Data Acquisition Unit, DAQU)进行数字化后,通过光纤链路传输集中至中央处理模块(Central processor module, CPM),然后通过PCIe接口传输至上位机。单个前端数据获取单元获取的数据率最大可达2.2 Gbit/s,因此对数据传输链路的带宽提出了较高要求。由于前端数据获取单元的核心控件是Cyclone V系列FPGA,中央处理模块的核心控件是Kintex-7系列FPGA,不同公司的FPGA间实现可靠的实时通信也带来了挑战。基于以上问题,进行了应用于在束PET的光纤链路设计,实现了Cyclone V系列FPGA与Kintex-7系列FPGA间的稳定通信。经过测试,该设计达到了高稳定、无误码的实时性能指标。
To monitor the irradiation dose and position of heavy ion beam with the imaging methods in the treatment of the heavy ion tumor radiotherapy, an In-Beam Positron Emission Tomography(In-beam PET) will be mounted in Heavy-Ion Medical Machine(HIMM) in China. In In-beam PET, the event data is collected by the detector array and digitized by front-end Data Acquisition Units(DAQU). Then digitized data will be sent to the Central Processing Module(CPM) through the optical fiber link, and finally transmitted to the host sever via the PCIe interface. A single DAQU can obtain a maximum data rate of 2.2 Gbit/s, which imposes high requirements on the transmission bandwidth of the optical fiber link accordingly. As the core of DAQU is Cyclone V FPGA and the core of CPM is Kintex-7 FPGA, the realization of reliable real-time communication between FPGAs of different companies is a challenge. This paper presents a new design and the implementation of the optical fiber link for In-beam PET, aiming to realize the stable communication between Cyclone V FPGA and Kintex-7 FPGA. The performance of the design shows that it can meet the demand of high stability and high accuracy in real-time.
作者
胡岷池
柯凌云
颜俊伟
王长鑫
千奕
佘乾顺
赵红赟
孔洁
HU Minchi;KE Lingyun;YAN Junwei;WANG Changxin;QIAN Yi;SHE Qianshun;ZHAO Hongyun;KONG Jie(Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou 730000,China;School of Nuclear Science and Technology,University of Chinese Academy of Sciences,Beijing 100049,China;School of Computer Science and Technology,University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《原子核物理评论》
CAS
CSCD
北大核心
2022年第1期88-94,共7页
Nuclear Physics Review
基金
国家自然科学基金资助项目(11775285,11975293)
甘肃省自然科学基金资助项目(20JR10RA066)
中国科学院青年创新促进会资助项目(2019408)。
