公开(公告)号：US20150030127A1

公开(公告)日：2015-01-29

申请号：US14337590

申请日：2014-07-22

Applicant: CANON KABUSHIKI KAISHA

Inventor： Shuji Aoki ,  Kazuyuki Ueda

IPC: H05G1/32 ,  H05G1/06 ,  G01N23/04 ,  H01J35/06

CPC classification number: H01J35/045 ,  G01N23/04 ,  H01J35/06 ,  H01J35/065 ,  H01J35/08 ,  H01J35/16 ,  H01J2235/164

Abstract: In a multi-source radiation generating apparatus including a plurality of combinations of a cathode and a target, an extraction electrode is disposed for a plurality of cathodes in common. When a potential of the extraction electrode is constant, potentials for the cathodes are selectively switched between a cutoff potential which is higher than the potential of the extraction electrode and an emission potential which is lower than the potential of the extraction electrode.

Abstract translation: 在包括阴极和靶的多个组合的多源辐射发生装置中，为多个阴极共同设置引出电极。 当提取电极的电位恒定时，阴极的电位在高于引出电极的电位的截止电位和低于引出电极的电位的发射电位之间选择性地切换。

公开(公告)号：US20140254755A1

公开(公告)日：2014-09-11

申请号：US14193601

申请日：2014-02-28

Applicant: Canon Kabushiki Kaisha

Inventor： Kazuya Tsujino ,  Kazuyuki Ueda

IPC: H01J35/04

CPC classification number: H01J35/045 ,  G21K1/02 ,  H01J35/14

Abstract: Provided is a high-output X-ray generation tube in which thermal damage to a target is reduced. The X-ray generation tube includes a target, an electron source, and a grid electrode having multiple electron passage apertures disposed between the target and the electron source. A source-side electron beam on the electron source side with respect to the grid electrode has a current density distribution, and the grid electrode has an aperture ratio distribution so that a region of the source-side electron beam in which a current density is largest is aligned with a region of the grid electrode in which an aperture ratio is smallest.

Abstract translation: 提供了对目标物的热损伤降低的高输出X射线发生管。 X射线发生管包括靶，电子源和具有设置在靶和电子源之间的多个电子通过孔的栅电极。 电子源侧的源侧电子束相对于栅电极具有电流密度分布，并且栅极具有开口率分布，使得电流密度最大的源侧电子束的区域 与孔径比最小的栅电极的区域对准。

公开(公告)号：US08340250B2

公开(公告)日：2012-12-25

申请号：US12554164

申请日：2009-09-04

Applicant: Sergio Lemaitre ,  Carey Rogers ,  Yun Zou ,  Jizhong Chen

Inventor： Sergio Lemaitre ,  Carey Rogers ,  Yun Zou ,  Jizhong Chen

IPC: H01J35/00

CPC classification number: H01J35/04 ,  A61B6/032 ,  A61B6/4021 ,  A61B6/482 ,  H01J35/045 ,  H01J35/06 ,  H01J2235/02 ,  H01J2235/06

Abstract: In one embodiment, an X-ray tube is provided. The X-ray tube comprises at least one thermionic cathode configured to generate an electron beam, a target assembly configured to generate X-rays when impinged with the electron beam emitted from the thermionic cathode, a high voltage supply unit for establishing an output voltage across the thermionic cathode and the target assembly for establishing an accelerating electric field between the thermionic cathode and the target assembly and a mesh grid disposed between the thermionic cathode and the target assembly, the mesh grid configured to operate at a voltage so as to lower the electric field applied at the surface of the thermionic cathode. Further, the voltage at the mesh grid is negatively biased with respect to the voltage at the thermionic cathode.

Abstract translation: 在一个实施例中，提供了X射线管。 所述X射线管包括构造成产生电子束的至少一个热离子阴极，配置成当与从所述热离子阴极发射的电子束碰撞时产生X射线的目标组件，用于建立跨越所述电子束的输出电压的高压电源单元 所述热离子阴极和所述目标组件用于在所述热离子阴极和所述目标组件之间建立加速电场，以及设置在所述热离子阴极和所述目标组件之间的网状网格，所述网状结构被配置为在电压下操作以降低所述电 场施加在热离子阴极的表面。 此外，网格网格处的电压相对于热离子阴极处的电压是负偏置的。

公开(公告)号：US20120082292A1

公开(公告)日：2012-04-05

申请号：US12894781

申请日：2010-09-30

Applicant: Yun Zou ,  Carey Shawn Rogers ,  Christopher David Unger ,  Mark Alan Frontera ,  Sergio Lemaitre

Inventor： Yun Zou ,  Carey Shawn Rogers ,  Christopher David Unger ,  Mark Alan Frontera ,  Sergio Lemaitre

IPC: A61B6/03 ,  H05G1/26

CPC classification number: H01J35/045 ,  A61B6/032 ,  A61B6/405

Abstract: A method for operating an electron beam system is presented. Further, an electron beam system, an X-ray tube and a CT system that implement the presented method are also described. The method includes generating an electron beam in an X-ray tube in an imaging system. Additionally, a current configuration corresponding to a particular view of the imaging system is identified. If the identified current configuration is within a determined range, a duty cycle of the electron beam for the particular view of the imaging system is modulated using pulse width modulation. Further, the modulated electron beam is focused towards a target.

Abstract translation: 提出了一种操作电子束系统的方法。 此外，还描述了实现所提出的方法的电子束系统，X射线管和CT系统。 该方法包括在成像系统中的X射线管中产生电子束。 另外，识别与成像系统的特定视图相对应的当前配置。 如果识别的当前配置在确定的范围内，则使用脉冲宽度调制来调制用于成像系统的特定视图的电子束的占空比。 此外，调制的电子束朝向目标聚焦。

公开(公告)号：US20110235785A1

公开(公告)日：2011-09-29

申请号：US13131086

申请日：2009-11-23

Applicant: Rolf Karl Otto Behling

Inventor： Rolf Karl Otto Behling

IPC: H01J35/14

CPC classification number: H01J35/14 ,  H01J35/04 ,  H01J35/045 ,  H01J35/26 ,  H01J2235/06

Abstract: The present invention refers to an X-ray tube of the rotary-anode type which comprises at least one temporarily negatively biased auxiliary grid electrode (119) with an aperture through which an electron beam (115) emitted by a tube cathode's thermoionic electron emitter (111) can pass. As an alternative thereto, the auxiliary grid electrode (119) may also be positively biased so as to enhance electron emission from a thermoionic electron emitter (111). The auxiliary grid electrode may thereby be connected to a supply voltage UAUX of a controllable voltage supply unit by means of a feedthrough cable (120) serving as a feeding line for providing the main control grid (112) with a grid supply voltage UG.

Abstract translation: 本发明涉及一种旋转阳极型X射线管，其包括至少一个具有孔的暂时负偏置的辅助栅电极（119），电子束（115）由管阴极的热分子电子发射器（ 111）可以通过。 作为替代方案，辅助栅电极（119）也可以被正偏置，以便增强来自热电子发射体（111）的电子发射。 因此，辅助栅极可以通过用作为主控电网（112）提供电网电源电压UG的馈电线的馈通电缆（120）连接到可控电压供应单元的电源电压UAUX。

公开(公告)号：US08019047B2

公开(公告)日：2011-09-13

申请号：US12467974

申请日：2009-05-18

Applicant: Curtis A. Birnbach

Inventor： Curtis A. Birnbach

IPC: H01J35/00

CPC classification number: H01J35/065 ,  A23L3/263 ,  A61L2/0011 ,  A61L2/082 ,  A61L11/00 ,  B09C1/002 ,  B09C1/08 ,  C02F1/008 ,  C02F1/305 ,  C02F1/307 ,  C02F2201/008 ,  C02F2201/326 ,  C02F2303/04 ,  H01J35/045 ,  H01J35/08 ,  H01J35/16 ,  H01J35/22 ,  H01J2235/062 ,  H01J2235/068 ,  H01J2235/086 ,  H01J2235/087 ,  H05G1/24

Abstract: An apparatus for Flash X-ray irradiation of material includes a Flash X-ray source comprised of an electron gun and an anode. The electron gun comprises a field emission cold cathode having an electron emitting surface, and a grid for controlling electron flow from the cathode to the anode. The anode has an electron-receiving main surface and an X-ray emitting, oppositely facing main surface. The X-ray emitting surface, emits X-radiation into an irradiation volume. The X-ray emitting surface of the anode has orthogonally oriented first and second dimensions of greater than 2 millimeters each. A high voltage pulse power supply powers the Flash X-ray source. The electron gun, anode and high voltage pulse power supply are so constructed as to create sufficient X-radiation in said irradiation volume to achieve a desired level of irradiation of material in said volume.

Abstract translation: 用于材料的闪光X射线照射的装置包括由电子枪和阳极组成的闪光X射线源。 电子枪包括具有电子发射表面的场发射冷阴极和用于控制从阴极到阳极的电子流的栅格。 阳极具有电子接收主表面和X射线相对的主表面。 X射线发射表面将X射线发射到辐射体积中。 阳极的X射线发射表面具有正交取向的第一和第二尺寸大于2毫米。 高压脉冲电源为闪光X射线源供电。 电子枪，阳极和高压脉冲电源被构造成在所述照射体积中产生足够的X射线，以达到所述体积中所需材料的照射水平。

公开(公告)号：US20110026681A1

公开(公告)日：2011-02-03

申请号：US12511815

申请日：2009-07-29

Applicant: Yun Zou ,  Carey Shawn Rogers ,  Sergio Lemaitre ,  Mark Alan Frontera ,  Edward Emaci ,  Vance Robinson

Inventor： Yun Zou ,  Carey Shawn Rogers ,  Sergio Lemaitre ,  Mark Alan Frontera ,  Edward Emaci ,  Vance Robinson

IPC: H01J35/06 ,  H01J9/00

CPC classification number: H01J35/06 ,  H01J35/045

Abstract: An x-ray imaging system includes a detector positioned to receive x-rays, and an x-ray tube coupled to a mount structure. The x-ray tube is configured to generate x-rays toward the detector and includes a target, a cathode cup, an emitter attached to the cathode cup and configured to emit a beam of electrons toward the target, the emitter having a length and a width, and a one-dimensional grid positioned between the emitter and the target and attached to the cathode cup at one or more attachment points. The one-dimensional grid includes a plurality of rungs that each extend in a direction of the width of the emitter, and the plurality of rungs are configured to expand and contract relative to the one or more attachment points without substantial distortion with respect to the emitter.

Abstract translation: x射线成像系统包括定位成接收x射线的检测器和耦合到安装结构的x射线管。 x射线管被配置成朝向检测器产生X射线，并且包括靶，阴极杯，连接到阴极杯并被配置为向靶发射电子束的发射器，发射器具有长度和 宽度和位于发射器和靶之间的一维网格，并且在一个或多个附着点处附接到阴极杯。 一维网格包括多个梯级，每个梯级各自在发射器的宽度方向上延伸，并且多个梯级被配置为相对于一个或多个附接点扩张和收缩，而相对于发射器没有实质的变形 。

公开(公告)号：US07564939B2

公开(公告)日：2009-07-21

申请号：US10554656

申请日：2004-04-23

Applicant: Edward James Morton ,  Russell David Luggar ,  Paul De Antonis

Inventor： Edward James Morton ,  Russell David Luggar ,  Paul De Antonis

IPC: A61B6/00

CPC classification number: A61B6/032 ,  A61B6/4007 ,  A61B6/4014 ,  A61B6/4021 ,  G01N23/046 ,  G01N2223/419 ,  G01V5/0016 ,  H01J35/04 ,  H01J35/045 ,  H01J35/24

Abstract: An X-ray scanning apparatus comprises a number of multi-focus X-ray tubes (25) spaced around an axis X and arranged to emit X-rays through an object on the axis which are detected by sensors (52). Each tube (25) can emit X-rays from a plurality of source positions. In each scanning cycle, in which each of the source positions in each of the tubes is used once, the ordering of the positions used is arranged so as to minimize the thermal load on the tubes (25). This is achieved by ensuring that each source position is non-adjacent to the previously active one and the next active one.

Abstract translation: X射线扫描装置包括围绕轴线X间隔开的多个多焦点X射线管（25），并布置成通过由传感器（52）检测到的轴上的物体发射X射线。 每个管（25）可以从多个源位置发射X射线。 在每个扫描周期中，其中每个管中的每个源位置被使用一次，所使用的位置的排列被布置成使得管（25）上的热负载最小化。 这是通过确保每个源位置与先前活动的位置和下一个活动的位置不相邻来实现的。

公开(公告)号：US20070172023A1

公开(公告)日：2007-07-26

申请号：US10554656

申请日：2004-04-23

Applicant: Edward Morton ,  Russell Luggar

Inventor： Edward Morton ,  Russell Luggar

IPC: A61B6/00 ,  G01N23/00 ,  G21K1/12 ,  H05G1/60

CPC classification number: A61B6/032 ,  A61B6/4007 ,  A61B6/4014 ,  A61B6/4021 ,  G01N23/046 ,  G01N2223/419 ,  G01V5/0016 ,  H01J35/04 ,  H01J35/045 ,  H01J35/24

Abstract: An X-ray scanning apparatus comprises a number of multi-focus X-ray tubes (25) spaced around an axis X and arranged to emit X-rays through an object on the axis which are detected by sensors (52). Each tube (25) can emit X-rays from a plurality of source positions. In each scanning cycle, in which each of the source positions in each of the tubes is used once, the ordering of the positions used is arranged so as to minimize the thermal load on the tubes (25). This is achieved by ensuring that each source position is non-adjacent to the previously active one and the next active one.

Abstract translation: X射线扫描装置包括围绕轴线X间隔开的多个多焦点X射线管（25），并布置成通过由传感器（52）检测到的轴上的物体发射X射线。 每个管（25）可以从多个源位置发射X射线。 在每个扫描周期中，其中每个管中的每个源位置被使用一次，所使用的位置的排列被布置成使得管（25）上的热负载最小化。 这是通过确保每个源位置与先前活动的位置和下一个活动的位置不相邻来实现的。

公开(公告)号：US20060233297A1

公开(公告)日：2006-10-19

申请号：US11402845

申请日：2006-04-13

Applicant: Fumio Ishiyama

Inventor： Fumio Ishiyama

IPC: A61B6/00 ,  G01N23/00 ,  G21K1/12 ,  H05G1/60

CPC classification number: H05G1/30 ,  A61B6/032 ,  A61B6/4014 ,  H01J23/065 ,  H01J35/045

Abstract: A CT scanner which collects X-ray projection data of a subject and which generates an image in the subject from the projection data, the CT scanner includes tubes which emit X-rays and which include grids to switch emission and stoppage of the X-rays, a unit which generates a high voltage to be supplied to the tubes, a cable which sends the high voltage to each of the tubes, circuits which change potentials of the grids arranged in the tubes, respectively, a control unit which controls the circuits to switch the emission and the stoppage of the X-rays in a pulse manner while the tubes rotate around the subject, detectors arranged to face the tubes, respectively, and a unit which validates an output signal from the detector facing the tube emitting the X-rays and which invalidates an output signal from the detector facing the tube stopping the emission of the X-rays.

Abstract translation: 一种CT扫描器，其收集被摄体的X射线投影数据并从投影数据生成被摄体中的图像，CT扫描器包括发射X射线的管，其包括用于切换X射线的发射和停止的网格 产生向管供给的高电压的单元，分别向每个管发送高压的电缆，改变设置在管中的电网的电位的电路，控制单元，其控制电路 当管绕着被摄体旋转时，以脉冲方式切换X射线的发射和停止，分别布置成面对管的检测器和用于验证来自检测器的输出信号的单元，所述检测器面向发射X射线的管的输出信号， 并且使来自检测器的输出信号无效，所述检测器面向管阻止X射线的发射。