摘要
本文基于Hygeia公司GMX-1型钴(60Co)放射外科系统,采用蒙特卡罗模拟程序GEANT4设计了一款新型准直器并进行了实测分析。该准直器在锥形通孔内置锥形环孔聚焦结构。EBT3胶片测量结果表明,在放射源活度、源轴距、射野尺寸等保持不变的条件下,该改进型准直器的射野半影比原来减小17.6%,吸收剂量率是原来的2.12倍。该改进型准直器在中心点吸收剂量率、射野半影两个关键技术参数上具有显著优势。
In this paper,a new collimator based on Hygeia GMX-1 cobalt(60Co)radiosurgery system was designed and analyzed using the Monte Carlo simulation program GEANT4.The results of EBT3 film measurements showed that the field penumbra of the improved collimator was reduced by 17.6%and the absorbed dose rate was 2.12 times higher,while the source activity,source axis distance and field size remained unchanged.The collimator has significant advantages in the two key technical parameters of absorbed dose rate and penumbra.
作者
周云
陈蔚海
刘永彪
严南
孙向上
廖文涛
刘俊雅
蒲越虎
ZHOU Yun;CHEN Weihai;LIU Yongbiao;YAN Nan;SUN Xiangshang;LIAO Wentao;LIU Junya;PU Yuehu(Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China;University of Chinese Academy of Sciences,Beijing 100049,China;Medical Equipment Innovation Research Center,West China Hospital,Sichuan University,Chengdu 610041,China;Techtron information technology(Shanghai)Co.,Ltd.,Shanghai 200233,China;Nanjing Maicong Medical Technology Co.,Ltd.,Nanjing 210023,China;Department of Radiation Physics and Technology,Jiangsu Province Hospital,Nanjing 210029,China;Department of Radiation Physics and Technology,Hunan Cancer Hospital,Changsha 410013,China)
出处
《辐射研究与辐射工艺学报》
CAS
CSCD
2023年第3期53-63,共11页
Journal of Radiation Research and Radiation Processing
基金
国家重点研发计划项目(2016YFCO105408)资助。
