10 lp/mm空间分辨率高能CT系统

基金项目: 国家自然科学基金项目(11975218，12005211，11805192，11905210，12035012)；中国工程物理研究院创新发展基金项目(CX2019036, CX2019037)

High-energy CT system with 10 lp/mm spatial resolution

1.
Institute of Applied Electronics, CAEP, Mianyang 621900, China
2.
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
3.
Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China
4.
Institute of Systems Engineering, CAEP, Mianyang 621900, China
5.
Institute of Materials, CAEP, Jiangyou 621907, China
6.
Jianghe Chemical Technology Co.，Ltd. Yichang 444200，China
7.
China Academy of Engineering Physics, Mianyang 621900, China

摘要:
报道了基于光阴极S波段电子直线加速器建成的9 MeV高能微焦点射线成像系统“精卫”，X射线束横向尺寸小于100 μm，7 h剂量波动低至1.6%。初步开展成像实验结果表明：双丝像质计清晰分辨13D号丝，丝直径0.05 mm，CT测试卡测得空间分辨率优于10 lp/mm，装置同时兼容电子束能量6～18 MeV可调。
- 高能微焦点X射线源 /
- 高能工业CT /
- 直线加速器 /
- 光阴极
Abstract:
Based on the photocathode S-band electron linac, a high-energy (9 MeV) micro-focus CT system named “Jingwei” was built. The focal-point is less than 100 μm, and the 7 h dose fluctuation is as low as 1.6%. An initial imaging experiment was also carried out. The focal spot of the dual-wire image quality meter clearly distinguished the 13D wire with a wire diameter of 0.05 mm, and the CT spatial resolution measured by a test card is better than 10 lp/mm. The electron beam energy of the system is also adjustable from 6 MeV to 18 MeV.
- high-energy micro-focus X-ray source /
- high-energy industrial CT /
- linac /
- photocathode

图 1 “精卫”CT系统初步实验结果

Figure 1. Preliminary experimental results of the “Jingwei” CT system

下载: 全尺寸图片幻灯片

[1]	李鹏, 王建新, 肖德鑫, 等. 9 MeV, 小于0.1 mm微焦点X射线源验证实验[J]. 强激光与粒子束, 2020, 32:054001 doi: 10.11884/HPLPB202032.200086 Li Peng, Wang Jianxing, Xiao Dexin, et al. Verification experiment of micro focus X-ray source with energy 9 MeV and beam size less than 0.1 mm[J]. High Power Laser and Particle Beams, 2020, 32: 054001 doi: 10.11884/HPLPB202032.200086
[2]	Hu Dongcai, Zhou Zheng, Wang Jianxin, et al. High-energy high-dose microfocus X-ray computed tomography driven by high-average-current photo-injector[J]. Journal of X-Ray Science and Technology, 2022, 30(1): 1-12.
[3]	谭龙升, 李晓辉, 魏存峰, 等. 闪烁体特性对 X 射线探测器成像质量影响研究[J]. 中国体视学与图像分析, 2022, 27(2):89-95 Tan Longsheng, Li Xiaohui, Wei Cunfeng, et al. Effects of scintillation characteristics on the imaging quality of X-ray detectors[J]. Chinese Journal of Stereology and Image Analysis, 2022, 27(2): 89-95
[4]	Xu Xieming, Wu Yiheng, Zhang Yi, et al. Two-dimensional perovskite single crystals for high-performance X-ray imaging and exploring MeV X-ray detection[J]. Energy & Environmental Materials, 2022: e12487.