Systems and methods for using x-ray field emission to determine instrument position and orientation

P Chopra - US Patent 11,445,988, 2022 - Google Patents
A method comprises determining a predicted pose of an elongate medical device within a
patient anatomy. The method further comprises extracting a plurality of reference images …

Preparation of a miniature carbon nanotube paste emitter for very high resolution X-ray imaging

YC Choi, JT Kang, S Park, MS Shin, H Jeon, JW Kim… - Carbon, 2016 - Elsevier
A miniature carbon nanotube (CNT) paste emitter dot with a diameter of∼ 50 μm was
fabricated onto the cross-sectional surface of Kovar (nickel-cobalt ferrous alloy) rod without …

High-current field emission of point-type carbon nanotube emitters on Ni-coated metal wires

H Lee, J Goak, J Choi, B Kong, CH Lee, KB Kim… - Carbon, 2012 - Elsevier
The fabrication and field emission characteristics are reported for point-type carbon
nanotube (CNT) emitters formed by transferring a CNT film onto a Ni-coated Cu wire with a …

Macroscopic self-standing SWCNT fibres as efficient electron emitters with very high emission current for robust cold cathodes

V Guglielmotti, E Tamburri, S Orlanducci, ML Terranova… - Carbon, 2013 - Elsevier
A novel of self-standing nanotube-based cold cathode is described. The electron emitter is a
single macroscopic fibre spun from neat single wall carbon nanotubes and consists of an …

Influence of Grid Aperture Ratio on Electron Transmittance and Electron Beam Spot Size in Field Emission Processes of Carbon Nanotubes

Y Li, X Liu, S Feng, Y Li, X Sun, A Wang, K Chen… - Applied Sciences, 2024 - mdpi.com
Field emission is an important work mode for electron sources, and carbon nanotubes
(CNTs) have been extensively studied for their good emission properties. It is well known …

阵列雷达的分层介质目标频域匹配滤波成像算法.

邓桂林, 马昭阳, 曾旸, 邓彬… - Journal of Signal …, 2022 - search.ebscohost.com
为了对平面分层介质目标的内部结构实现高分辨三维(Three-Dimensional, 3D) 成像,
提出了一种基于频域匹配滤波(Frequency-Domain Matched Filter, FDMF) 的快速成像算法 …

The design and fabrication of carbon-nanotube-based field emission X-ray cathode with ballast resistor

Y Sun, DA Jaffray, JTW Yeow - IEEE transactions on electron …, 2012 - ieeexplore.ieee.org
The incorporation of a ballast resistor layer underneath field emitters can improve the
reliability and stability of field emission cathodes. However, it has not been successfully …

Electrostatic focusing lens module with large focusing capability in carbon nanotube emitter-based X-ray sources

JW Kim, MS Shin, JW Jeong, JT Kang… - IEEE Electron …, 2015 - ieeexplore.ieee.org
We fabricated and analyzed an electrostatic focusing lens (FL) module comprising a micro-
FL with many holes near the gate and a macro-FL of single aperture toward the anode for …

[PDF][PDF] 用于行星原位分析的微型微焦斑X 射线激发源

曹阳, 桑鹏, 李保权, 牟欢, 李海涛, 王欢, 李帆… - Acta Optica …, 2023 - researching.cn
摘要基于微型X 射线闭管的X 射线荧光谱仪是深空探测新一代元素就位分析技术,
研制了一款微型微焦斑X 射线闭管作为X 射线荧光分析的激发源. 设计了一种新型的单极静电 …

Effect of a concave grid mesh in a carbon nanotube-based field emission X-ray source

HS Kim, EJD Castro, CH Lee - Materials Research Bulletin, 2014 - Elsevier
This study introduces a simple approach to improve the X-ray image quality produced by the
carbon nanotube (CNT) field emitter X-ray source by altering the geometrical shape of the …