Micro Computed Tomography System Based on Field Emission X-Ray Source with Carbon Nanotube Emitter

被引：0
|
作者：
Kim, Wooseob [1 ]
Gupta, Amar Prasad [1 ]
Jang, Jaekyu [2 ]
Jung, Jaeik [2 ]
Ryu, Jehwang [1 ]
机构：
[1] Kyung Hee Univ, Dept Phys, Seoul 02447, South Korea
[2] CAT Beam Tech Co Ltd, Seoul 02455, South Korea
来源：
MEDICAL IMAGING 2020: PHYSICS OF MEDICAL IMAGING | 2020年 / 11312卷
基金：
新加坡国家研究基金会;
关键词：
Carbon nanotube; Field emission; X-ray; Computed tomography;
D O I：
10.1117/12.2549867
中图分类号：
R318 [生物医学工程];
学科分类号：
0831 ;
摘要：
The properties of carbon nanotubes (CNTs) show a variety of application possibilities in the next generation industries. Among them, application to a field emission device is expected due to a high emission current at a low critical electric field. Compared with conventional thermionic emission X-ray sources, field emission X-ray sources have many advantages. Their electric field can be turned on and off quickly, minimizing radiation exposure times. Additionally, the size of the imaging system can be reduced because no cooling device is required. Using these advantages, we created a micro computed tomography (CT) system based on a CNT field emission X-ray source. The main advantages of the microCT lie in the high-spatial resolution, sensitivity to skeletons and lungs, and low cost. We optimized the field emission characteristics of the CNTs and the system geometry for high resolution.
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页数：7
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