公开(公告)号：US20060098783A1

公开(公告)日：2006-05-11

申请号：US10904284

申请日：2004-11-02

Applicant: Bruce Dunham ,  John Price ,  Colin Wilson

Inventor： Bruce Dunham ,  John Price ,  Colin Wilson

IPC: H01J35/22 ,  H01J35/00 ,  H01J35/32

CPC classification number: H01J35/065 ,  H01J35/24 ,  H01J2235/062 ,  H01J2235/068 ,  H01J2235/087

Abstract: An electron emitter assembly and a method for adjusting a power level of an electron beam are provided. The electron emitter assembly includes a laser configured to emit a first light beam. The electron emitter assembly further includes a light-attenuating device configured to receive the first light beam and to attenuate the first light beam between a first light intensity and a second light intensity greater than the first light intensity. The electron emitter assembly further includes a photo-cathode configured to receive the first light beam from the light-attenuating device. The photo-cathode is further configured to emit a first electron beam having a first power level in response to receiving the first light beam having the first light intensity. The photo-cathode is further configured to emit a second electron beam having a second power level greater than the first power level in response to receiving the first light beam having the second light intensity. The electron emitter assembly further includes an anode configured to receive the first and second electrons beams from the photo-cathode.

Abstract translation: 提供了一种用于调节电子束功率电平的电子发射器组件和方法。 电子发射器组件包括被配置为发射第一光束的激光器。 电子发射器组件还包括被配置为接收第一光束并且在第一光强度和大于第一光强度的第二光强度之间衰减第一光束的光衰减器件。 电子发射器组件还包括被配置为从光衰减装置接收第一光束的光阴极。 光阴极还被配置为响应于接收到具有第一光强度的第一光束而发射具有第一功率电平的第一电子束。 响应于接收到具有第二光强度的第一光束，光阴极还被配置为发射具有大于第一功率电平的第二功率电平的第二电子束。 电子发射器组件还包括被配置为从光阴极接收第一和第二电子束的阳极。

公开(公告)号：US06876724B2

公开(公告)日：2005-04-05

申请号：US10051183

申请日：2002-01-22

Applicant: Otto Z. Zhou ,  Jianping Lu ,  Qi Qiu

Inventor： Otto Z. Zhou ,  Jianping Lu ,  Qi Qiu

IPC: A61B6/03 ,  A61B6/00 ,  G21K5/02 ,  G21K5/08 ,  H01J35/06 ,  H01J35/08 ,  H01J35/16 ,  H01J35/24 ,  H05G1/00 ,  H05G1/34 ,  H01J36/06

CPC classification number: H01J35/14 ,  A61B6/032 ,  A61B6/4028 ,  B82Y10/00 ,  H01J35/065 ,  H01J35/22 ,  H01J2201/30469 ,  H01J2235/064 ,  H01J2235/068 ,  H05G1/34

Abstract: A structure to generate x-rays has a plurality of stationary and individually electrically addressable field emissive electron sources with a substrate composed of a field emissive material, such as carbon nanotubes. Electrically switching the field emissive electron sources at a predetermined frequency field emits electrons in a programmable sequence toward an incidence point on a target. The generated x-rays correspond in frequency and in position to that of the field emissive electron source. The large-area target and array or matrix of emitters can image objects from different positions and/or angles without moving the object or the structure and can produce a three dimensional image. The x-ray system is suitable for a variety of applications including industrial inspection/quality control, analytical instrumentation, security systems such as airport security inspection systems, and medical imaging, such as computed tomography.

Abstract translation: 产生X射线的结构具有多个静电和单独可电寻址的场发射电子源，其具有由诸如碳纳米管的场发射材料组成的衬底。 以预定频率电场电场切换场致发射电子源以可编程序列朝向目标上的入射点发射电子。 产生的x射线的频率和位置与场发射电子源的频率和位置相对应。 发射器的大面积目标和阵列或矩阵可以对来自不同位置和/或角度的物体进行成像，而不移动物体或结构，并可产生三维图像。 x射线系统适用于各种应用，包括工业检测/质量控制，分析仪器，机场安全检查系统等安全系统和计算机断层扫描等医学成像。

公开(公告)号：US5844963A

公开(公告)日：1998-12-01

申请号：US919836

申请日：1997-08-28

Applicant: Thomas Koller ,  Rajesh Bandari ,  Jeff Takenaka ,  Rick Smith

Inventor： Thomas Koller ,  Rajesh Bandari ,  Jeff Takenaka ,  Rick Smith

IPC: H01J35/06 ,  H01J35/14

CPC classification number: H01J35/06 ,  H01J2235/068

Abstract: A method and apparatus for superimposing a plurality of electron beams at a desired location after X-ray tube manufacturing processes are generally complete. The method is embodied in providing mechanical and electrical means which are internal to the X-ray tube which provide means for adjustment of a focal point of a plurality of electron beams being emitted from a cathode assembly to thereby provide precise control of where the plurality of electron beams achieve superimposition on a target anode.

Abstract translation: 一般在X射线管制造工序之后的期望位置上叠加多个电子束的方法和装置。 该方法体现在提供在X射线管内部的机械和电气装置，其提供用于调节从阴极组件发射的多个电子束的焦点的装置，从而提供精确控制多个 电子束实现了对目标阳极的叠加。

公开(公告)号：US5535254A

公开(公告)日：1996-07-09

申请号：US443288

申请日：1995-05-17

Applicant: Todd R. Carlson

Inventor： Todd R. Carlson

IPC: H01J35/06 ,  H01J35/14 ,  H05G1/10 ,  H05G1/52

CPC classification number: H05G1/10 ,  H01J35/06 ,  H05G1/52 ,  H01J2235/068

Abstract: A self-biased focus X-ray generating tube has a cathode assembly connected by its insert end to a multiplier from outside a vacuum envelope. The multiplier rectifies and multiplies AC power of the filament drive to provide a DC voltage, which is applied to the cathode assembly for pinching the electron beam traveling between the cathode and the anode target of X-ray tube and, as a result, improving the quality of the focal spot.

Abstract translation: 自偏压焦点X射线发生管具有通过其插入端通过真空外壳从外部连接到乘法器的阴极组件。 乘法器对灯丝驱动器的交流电力进行整流和乘法，以提供直流电压，该直流电压被施加到阴极组件以夹持在X射线管的阴极和阳极靶之间行进的电子束，结果改善了 焦点质量。

公开(公告)号：US5195112A

公开(公告)日：1993-03-16

申请号：US695517

申请日：1991-05-03

Applicant: Paul Vincent ,  Gunther Laukien ,  Arne Kasten

Inventor： Paul Vincent ,  Gunther Laukien ,  Arne Kasten

IPC: A61B6/03 ,  H01J35/06 ,  H01J35/08 ,  H01J35/14

CPC classification number: A61B6/4447 ,  A61B6/4028 ,  H01J35/06 ,  H01J35/08 ,  H01J35/14 ,  H01J2235/068

Abstract: An X-ray computer tomography system with a stationary ring anode and a plurality of stationary electron sources for the construction of fast scan images from the inside of an object is improved in such a way that there is free access from both sides of the scan region, that the gantry unit can be tilted, and that the image quality which can be achieved is comparable to that of conventional tomography systems with mechanical motion of the anode. A plurality of electron sources are configured in proximity to the ring anode on a stationary ring, with each source being capable of sweeping its respective electron beam over a portion of the anode ring.

Abstract translation: 具有固定环形阳极和用于从物体内部构造快速扫描图像的多个固定电子源的X射线计算机断层摄影系统被改进，使得从扫描区域的两侧可以自由进入 台架单元可以倾斜，并且可以实现的图像质量与具有阳极的机械运动的常规断层摄影系统的图像质量相当。 多个电子源被配置在固定环上的环形阳极附近，每个源能够在其阳极环的一部分上扫过其各自的电子束。

公开(公告)号：US4868842A

公开(公告)日：1989-09-19

申请号：US27787

申请日：1987-03-19

Applicant: James J. Dowd

Inventor： James J. Dowd

IPC: H01J35/06 ,  H01J35/14

CPC classification number: H01J35/06 ,  H01J35/14 ,  H01J2235/068

Abstract: A cathode electrode improvement is disclosed which utilizes a front focus slot having a diverging cross-sectional area to focus an electron beam within an x-ray tube to provide a high emission, small area focal spot.

Abstract translation: 公开了一种利用具有发散横截面面积的前聚焦槽将电子束聚焦在X射线管内以提供高发射小面积焦斑的阴极电极改进。

公开(公告)号：US3946261A

公开(公告)日：1976-03-23

申请号：US538276

申请日：1975-01-03

Applicant: William P. Holland ,  Capleton I. Swanson ,  Jacob A. Randmer

Inventor： William P. Holland ,  Capleton I. Swanson ,  Jacob A. Randmer

IPC: H01J35/06

CPC classification number: H01J35/06 ,  H01J2235/068

Abstract: An X-ray tube including a tubular envelope having therein two cathode filaments operatively disposed in spaced relationship with an anode target surface, one filament being made of a material suitable for low current operation and the other filament being made of a material suitable for high current operation of the X-ray tube.

Abstract translation: 一种X射线管，其包括管状外壳，其中具有可操作地与阳极靶表面间隔开的两个阴极细丝，一根灯丝由适合于低电流操作的材料制成，另一根灯丝由适合于高电流的材料制成 操作X射线管。

公开(公告)号：US3591821A

公开(公告)日：1971-07-06

申请号：US3591821D

申请日：1968-04-15

Applicant: TOKYO SHIBAURA ELECTRIC CO

Inventor： SEKI YOSHITAKA ,  MURAKI TAKESHI

IPC: H01J35/06 ,  H01J35/26

CPC classification number: H01J35/06 ,  H01J2235/068

Abstract: An X-ray generator comprises a cathode and a rotary anode mounted in opposite ends of an envelope. The cathode is provided with an electron emitting source in a desired doughnut-shaped region which is bounded by a minimum diameter circle and a maximum diameter circle, both of these circles being concentric with the rotary axis of said anode. The anode projects X-rays upon impingement thereof by an electron beam emitted from said electron emitting source. The electron emitting source is arranged on a line which connects the minimum and maximum diameter circles, whereby the electron beam from said electron emitting source is projected to the entire part of said X-ray radiating region by rotating said anode.

公开(公告)号：US11844641B2

公开(公告)日：2023-12-19

申请号：US17300467

申请日：2021-07-12

Applicant: Michael Keith Fuller

Inventor： Michael Keith Fuller

IPC: H01J35/10 ,  H01J35/26 ,  H01J35/28 ,  H01J35/30 ,  H05G1/52 ,  A61B6/00 ,  G01N23/041

CPC classification number: A61B6/484 ,  A61B6/4021 ,  H01J35/10 ,  H01J35/26 ,  H01J35/28 ,  H01J35/305 ,  H05G1/52 ,  A61B6/5205 ,  G01N23/041 ,  G21K2207/005 ,  H01J2235/068 ,  H01J2235/081 ,  H01J2235/086

Abstract: An x-ray tube source is disclosed that allows differential phase shift, attenuation, and x-ray scattering features of an object to be acquired in a single exposure. Such multiplexed x-ray tube source includes multiple x-ray spot origins controlled in such a way that each slightly separated spot is temporally modulated “ON and OFF” at differing frequencies. In an x-ray interferometer system, such x-ray tube source forms multiple illumination beams of a single angular view of an object's feature but each with different interference fringe locations. A composite image can be acquired with a high frame-rate digital detector as a component element in such x-ray interferometer system. Such composite image can be subsequently de-multipexed and separately presented according to each spot-source illumination beam. Such isolated images of an object's feature, each having different fringe locations, allows for post-acquisition “fringe-mapping” analysis of the feature's full interaction with x-rays, including refraction, scattering, and absorption.

公开(公告)号：US20190206653A1

公开(公告)日：2019-07-04

申请号：US16236422

申请日：2018-12-29

Applicant: SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD.

Inventor： Yun ZOU ,  Xi ZHANG ,  Dun LI ,  Yanfeng DU ,  Haining SUN

IPC: H01J35/10 ,  H01J35/06 ,  H01J35/18

CPC classification number: H01J35/101 ,  H01J35/06 ,  H01J35/18 ,  H01J2235/068 ,  H01J2235/085

Abstract: A radiation emission device is provided. The radiation emission device may include an anode, a first cathode, a heating device and an enclosure. The first cathode may include a first filament that emit an electron beam striking the anode to generate radioactive rays for imaging. The heating device may be located outside of the first cathode and be configured to warm up the anode. The enclosure may be configured to enclosure the first cathode and the anode.