基于临床实例的影响蒙特卡罗程序MCNP计算精度和速度的若干参数模拟研究

Investigation of Parameters Influencing on Simulation Precision and Speed of Monte Carlo MCNP Based on a Clinic Case

摘要: 蒙特卡罗方法是目前最精确的剂量计算方法，但其较长的模拟时间阻碍了它在临床治疗中的应用。基于蒙特卡罗程序MCNP4c，针对一临床头部病例，探讨了记数方法、电子和光子截断能、光子产生次级电子参数ENUM对计算速度和精度的影响，给出了在保证一定精度前提下的最佳计算模式，以获得计算速度的有效提升。Monte its long simulation and photons, and investigated based Carlo method is regarded as the most accurate method for dose calculation at present, whereas time hinders its clinic application. The effects of the tally method, the cut-off energy of electrons the secondary electron number parameter ENUM on precision and speed of MCNP4c have been on a clinical case to seek for a relatively optimum calculation mode.

Abstract: Monte its long simulation and photons, and investigated based Carlo method is regarded as the most accurate method for dose calculation at present, whereas time hinders its clinic application. The effects of the tally method, the cut-off energy of electrons the secondary electron number parameter ENUM on precision and speed of MCNP4c have been on a clinical case to seek for a relatively optimum calculation mode.