在辐射成像系统的设计研发中, 经常需要计算系统的各项物理性能指标。为了提升产品研发的效率, 同方威视联合清华大学, 基于蒙特卡罗程序包Geant4, 研发了国内首套具有自主知识产权的辐射成像系统模拟软件NucRPD(NUCTECH Radiography Performance Design Tools), 其能够快速、精确地模拟系统的各项性能指标。该软件对常用的一些辐射成像系统进行了参数化建模, 用户通过修改软件界面上的少量参数, 就可以快速建立各类辐射成像系统的几何体、源项、物理模型和统计量, 然后在服务器上以并行计算方式完成模拟计算, 能在较短的时间内模拟出系统的性能指标, 并给出直观的图形帮助用户深入理解模拟结果。NucRPD的模拟结果经过了大量的实验验证, 其剂量场分布和物理指标等模拟结果和实验结果符合得很好。NucRPD已经应用于同方威视辐射成像系统产品的设计研发, 在产品的物理指标优化和辐射防护优化中发挥了重要作用。

In the design of the radiography system, designers often need to calculate the system performance indexes. In order to improve the product development efficiency, Nuctech Company Limited and Tsinghua University have jointly developed a professional radiography simulation software NucRPD based on Geant4 for the first time in China. NucRPD has established the parameterized models for the often used radiography systems, so that users can simply modify a few parameters from the user interface to quickly build a virtual radiography system, including the geometry, the particle source, the physical processes and the statistical quantities. Then NucRPD can carry out the parallel calculations in the computing cluster to give the simulation results in a short period. NucRPD can also show the results in an intuitive and elegant way to help users to deeply understand the simulation results. We have compared the simulation results of NucRPD with a large set of experiments, and simulation results of the imaging performance and radiation protection performance agree well with those of experiments. NucRPD has been successfully applied to the designs of the radiography products in Nuctech Company Limited, and it has played an increasingly important role in optimizing the imaging performance and radiation protection performance.