基于蒙特卡罗平台的多能CT闪烁探测器研究

Study on Multi-Energy CT Scintillation Detector Based on Monca Platform

传统CT只能在单一能谱下生成投影,图像的硬化伪影较高,使得物质区分能力不足,且试验成本高昂。针对上述问题,在计算机上使用Geant4和GATE数据包搭建多能CT的蒙特卡罗模拟仿真平台,构建3层闪烁探测器,最后由FBP算法重建出投影图像。仿真结果表明:利用三层闪烁探测器可同时获取多个能谱下的投影,提高了图像质量及工作效率。仿真结果还验证了平台的可用性。

The traditional CT can only generate projections under a single energy spectrum,and the hardened pseudo image of the image is higher,which makes the material differentiation ability not sufficient,and the test cost is high. According to the above problem,this paper studied on the computer using Geant4 and GATE structures,pluripotent CT data packets of monte carlo simulation platform,build three layers of scintillation detector,and then place the FBP algorithm of projection image reconstruction. The results show that using the three-layer scintillation detector can simultaneously obtain the projection of multiple energy spectra,improve the image quality and work efficiency,and verify the availability of the platform.