Study on Multiplex Imaging in Proton radiography

我们研究了在质子治疗设备中使用质子加速器的多重质子放射照相。利用基于Geant4仿真工具包的蒙特卡罗仿真和高能物理研究中的分析技术进行了研究。提出的质子成像系统的可能性，性能和优化方面进行了研究。为了实现简单的质子射线照相，我们利用范围调制器来改变质子束的能量，以强调不同材料的能量损失。我们从图像质量和目标的辐射剂量两方面对所提出的系统进行了评估。结果表明，与其他质子成像系统相比，该系统可以用更简单、更便宜的设备获得质子图像。

We studied about the multiplex proton radiography using a proton accelerator in a proton therapy facility. The study has been performed by using the Monte Carlo simulation based on Geant4 simulation toolkit and the analysis techniques in the High Energy Physics research. The proposed proton imaging system was investigated in terms of possibility, performance, and optimizations.For the purpose of realizing a simple proton radiography, we utilized the range modulator to vary proton beam energy to emphasis the energy losses of different materials. We evaluated our proposed system in the image quality and the radiation dose in the target. The result shows that our system can obtain proton images with simpler and cheeper equipments than other proton imaging systems.