Summing adjacent signals from BGO array in neutron stimulated emission computed tomography
-
摘要: 由于受激元素所辐射的光子能量范围主要集中在100 keV~6 MeV之间,因此通过基于此能量范围的射线源模拟实验研究了采用锗酸铋(BGO)阵列相邻信号叠加实现能量高分辨率的新方法并分析比较了其性能。结果显示:对于较高能的光子,若仅使用单根BGO晶体产生的信号时不可能得到较好的能量分辨率;而当使用BGO阵列将该单晶体产生的信号与相邻晶体产生信号相加,则能谱质量会变得更佳。对于能量分辨率为90 keV的能量窗,通过模拟得到平均固有空间分辨率为3.938 mm (FWHM)。
-
关键词:
- 中子受激辐射计算机断层扫描成像技术 /
- 能量分辨率 /
- 固有空间分辨率 /
- Geant4
Abstract: Neutron stimulated emission computed tomography (NSECT) is a new approach for biological spectroscopy and imaging. Since the gamma-ray photons emitted from stimulated element have energies from 100 keV to about 6 MeV, previous reports have proposed that the projection path can be defined by the neutron beam. In this paper, a good energy resolution method has been applied, whose performance is analysed through simulations. Using signals from a single BGO crystal, it is impossible to achieve good energy resolution for such high-energy photons. But when summing additional signals from adjacent crystals, the energy spectrum becomes much better. Using an energy window with energy resolution of 90 keV, an average intrinsic spatial resolution of 3.938 mm FWHM is obtained. 期刊类型引用(5)
1. 陈俊宏,吴一,王英翘,李维斌,陈宇红,王雅丽,张潇鹏,郑雪,张春光,宣伟民,姚列英,谈昊,罗文武,周培海,宋显明,刘韶轩,孙泽群,丛子建,杨恩武,葛兴信,高翔. EXL-50U磁体线圈电源系统研制. 核技术. 2024(05): 120-130 . 百度学术
2. 吴琳君,李海燕,雷枭,吴一,刘邵轩. HL-3聚变用大容量Crowbar. 南方能源建设. 2024(03): 137-145 . 百度学术
3. 姚巨堃,李维斌,吴一,郑雪. HL-3装置极向场电源环流控制研究. 核聚变与等离子体物理. 2024(03): 249-255 . 百度学术
4. 叶强,李华俊,李维斌,卜明南,彭建飞. 基于CompactRIO的脉冲发电机励磁控制器设计. 大电机技术. 2023(06): 90-96 . 百度学术
5. 李维斌,陈宇红,王雅丽,郑雪,任青华,吴一,韩艾玻,王英翘,宣伟民. 磁场电源在HL-2M装置初始等离子体放电中的应用. 核聚变与等离子体物理. 2021(S2): 467-471 . 百度学术
其他类型引用(2)
-

计量
- 文章访问数: 1160
- HTML全文浏览量: 244
- PDF下载量: 117
- 被引次数: 7