【摘 要】
：
用MCNP蒙特卡罗程序模拟了硼中子俘获治疗(BNCT)3种国际基准网格模型,并与修正的Snyder椭球模型进行了比较.在此基础上,给出了一种保质量守恒、内存量少、易于产生输入文件的
【机 构】
：
中国工程物理研究院北京研究生部,北京应用物理与计算数学研究所计算物理实验室
论文部分内容阅读
用MCNP蒙特卡罗程序模拟了硼中子俘获治疗(BNCT)3种国际基准网格模型,并与修正的Snyder椭球模型进行了比较.在此基础上,给出了一种保质量守恒、内存量少、易于产生输入文件的4种基本材料成分的BNCT网格模型.计算结果表明,在4mm网格下,新模型可以达到基准模型的精度;根据解析模型剂量随深度的变化规律,研究构造了多网格组合模型,在重要区域计算精度不损失的条件下,计算时间大大缩短.最后研究给出了一个既保证精度、又在可接受的时间内完成剂量计算的模型、样本数和相应的算法,它基本上满足临床BNCT的要求.
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