摘要
给出BNCT治疗计划系统软件MCDB的算法及测试结果,通过使用材料矩阵描述BNCT的网格模型,配合快速径迹算法和计数矩阵,进行粒子输运模拟及计数,模拟结果显示,MCDB的计算精度与MCNP相当,计算速度较MCNP提高3.1～3.4倍.MCDB模拟1 000万粒子的时间不足2个CPU小时,可保证大部分网格剂量误差在5%以内,基本上达到了BNCT临床要求,可用于30 kW的医院中子照射器的临床治疗.
A BNCT treating planning system MCDB is developed. Three-dimensional material matrix and tally matrix are designed, which are used to describe voxel models and tally. A fast track technique is used in simulation. Computation time is greatly decreased compared with MCNP code. Same dosimetry results with MCNP are achieved by MCDB, which is faster by 3.1 ~ 3.4 times with respect to MCNP. Computation time and accuracy of most voxels reach clinical BNCT requirement in a scale of 10 million particles.
出处
《计算物理》
EI
CSCD
北大核心
2012年第5期721-726,共6页
Chinese Journal of Computational Physics
基金
国家自然科学基金(61033009
91118001)
国家重点基础研究发展计划(2011CB309702)
中国工程物理研究院基金(2011A0103006)
国家磁约束聚变能研究专项(2010GB111001)资助项目
