用于HIRFL重离子治癌的PET成像实验研究与蒙特卡罗模拟

Investigation of PET Imaging Experiment and Monte Carlo Simulation for Cancer Therapy Using Heavy-Ion Beams at HIRFL

为了HIRFL重离子治癌的需要 ,使用两个位置灵敏闪烁体探测器组成了一个简单的PET成像系统 .对PET成像进行了实验研究 ,实验测量得到了物体成像以及γ射线能谱 ,对于 5 11keV全能峰处的能量分辨率为 18 6 % ,峰总比为 5 2 4 % .采用GEANT3程序对该系统进行了模拟计算 ,并与实验进行比较 。

For cancer therapy using heavy-ion beams at HIRFL, a simple Positron Emission Tomography(PET) imaging system was made using two position sensitive BGO scintillator detectors. The object images and γ ray energy spectra were measured for the PET. The energy resolution for the 511keV full energy peak is 18 6% and its countiong fraction is 52 4%. Monte Carlo calculations were performed for the PET imaging system by using GEANT3 code. The object images and γ ray energy spectra are in good agreement with the experimental data. In order to develop a PET imaging system with high efficiency, good resolution and low cost, the PET imaging system was optimized.