公开(公告)号：US20110142193A1

公开(公告)日：2011-06-16

申请号：US12639206

申请日：2009-12-16

Applicant: Mark Alan Frontera ,  Yun Zou ,  Peter Andras Zavodszky ,  Sergio Lemaitre ,  Carey Shawn Rogers

Inventor： Mark Alan Frontera ,  Yun Zou ,  Peter Andras Zavodszky ,  Sergio Lemaitre ,  Carey Shawn Rogers

IPC: H05G1/60 ,  H01J35/14 ,  H01J35/30

CPC classification number: H01J35/14 ,  H01J35/045

Abstract: An injector for an X-ray tube is presented. The injector includes an emitter to emit an electron beam, at least one focusing electrode disposed around the emitter, wherein the at least one focusing electrode focuses the electron beam and at least one extraction electrode maintained at a positive bias voltage with respect to the emitter, wherein the at least one extraction electrode controls an intensity of the electron beam.

Abstract translation: 提出了一种用于X射线管的注射器。 所述喷射器包括发射电子束的发射器，设置在所述发射极周围的至少一个聚焦电极，其中所述至少一个聚焦电极聚焦所述电子束和相对于所述发射极保持在正偏置电压的至少一个引出电极， 其中所述至少一个提取电极控制所述电子束的强度。

公开(公告)号：US20110058643A1

公开(公告)日：2011-03-10

申请号：US12554164

申请日：2009-09-04

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

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

IPC: G01N23/04 ,  H01J35/06 ,  H05G1/10 ,  G01N23/08 ,  H01J35/14

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：US07792241B2

公开(公告)日：2010-09-07

申请号：US12257658

申请日：2008-10-24

Applicant: Xiaoye Wu ,  David Langan ,  Colin R. Wilson ,  Yun Zou

Inventor： Xiaoye Wu ,  David Langan ,  Colin R. Wilson ,  Yun Zou

IPC: A61B6/00

CPC classification number: H01J35/06 ,  H01J35/045 ,  H01J2235/068

Abstract: A CT system includes a rotatable gantry having an opening for receiving an object to be scanned and an x-ray source coupled to the gantry and configured to project x-rays through the opening. The x-ray source includes a target, a first cathode configured to emit a first beam of electrons toward the target, a first gridding electrode coupled to the first cathode, a second cathode configured to emit a second beam of electrons toward the target, and a second gridding electrode coupled to the second cathode. The system includes a generator configured to energize the first cathode to a first kVp and to energize the second cathode to a second kVp, and a detector attached to the gantry and positioned to receive x-rays that pass through the opening. The system also includes a controller configured to apply a gridding voltage to the first gridding electrode to block emission of the first beam of electrons toward the target, apply the gridding voltage to the second gridding electrode to block emission of the second beam of electrons toward the target, and acquire dual energy imaging data from the detector.

Abstract translation: CT系统包括可旋转机架，其具有用于接收待扫描物体的开口和耦合到台架的x射线源，并且被配置成通过开口投影X射线。 x射线源包括目标，被配置为朝向目标发射第一电子束的第一阴极，耦合到第一阴极的第一网格电极，被配置为向靶发射第二电子束的第二阴极，以及 耦合到第二阴极的第二栅电极。 该系统包括发电机，其被配置为将第一阴极激励到第一kVp并且将第二阴极激励到第二kVp，以及附接到台架并被定位成接收穿过开口的x射线的检测器。 该系统还包括：控制器，被配置为向第一格栅电极施加网格化电压，以阻止第一电子束朝向目标的发射，将网格化电压施加到第二格栅电极，以阻止第二电子束朝向 目标，并从检测器获取双能量成像数据。

公开(公告)号：US20090285362A1

公开(公告)日：2009-11-19

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 electrode 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。 电子枪包括具有电极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射线发射到照射体积中。 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：US20060115050A1

公开(公告)日：2006-06-01

申请号：US10541563

申请日：2004-01-05

Applicant: Theodore Resnick

Inventor： Theodore Resnick

IPC: H05G1/44

CPC classification number: A61B6/405 ,  A61B6/032 ,  A61B6/4021 ,  H01J35/045 ,  H01J35/14 ,  H05G1/34 ,  H05G1/36

Abstract: A dose-modulated irradiating system includes an x-ray tube (20) with at least a filament (80) for generating electrons, a cathode (84) and an anode (92) for accelerating and collimating the generated electrons into an electron beam (94), and an electrostatic grid with grid electrodes (110, 112) for steering the electron beam (94) on the anode (92). The anode (92) generates an x-ray beam (96) responsive to the electron beam (94). Grid biasing is provided for applying a time-varying electrical bias to the grid electrodes (110, 112) that produces a first time-varying intensity modulation of the electron beam (94). A current of the filament (80) is modulated to produce a second time-varying intensity modulation of the electron beam (94). A controller (52) controls cooperatively combining the first and second time-varying intensity modulations to produce a combined time-varying intensity modulation.

Abstract translation: 剂量调制照射系统包括具有用于产生电子的至少一根细丝（80）的X射线管（20），用于加速和准直所产生的电子为电子束的阴极（84）和阳极（92） 94）以及具有用于转向阳极（92）上的电子束（94）的栅格电极（110,112）的静电栅格。 阳极（92）响应于电子束（94）产生X射线束（96）。 栅格偏置被提供用于对产生电子束（94）的第一时变强度调制的栅电极（110,112）施加时变电偏压。 灯丝（80）的电流被调制以产生电子束（94）的第二时变强度调制。 控制器（52）控制协同地组合第一和第二时变强度调制以产生组合的时变强度调制。

公开(公告)号：US06944268B2

公开(公告)日：2005-09-13

申请号：US10469769

申请日：2002-08-29

Applicant: Takashi Shimono

Inventor： Takashi Shimono

IPC: H05G1/30 ,  H05G1/34 ,  H05G1/32

CPC classification number: H01J35/045 ,  H05G1/30 ,  H05G1/34

Abstract: An X-ray generator comprises a cathode electrode (15), a grid electrode (17) for controlling an electron beam (e) generated by the cathode electrode (15), a focus electrode (18) for focusing the electron beam (e), and an anode target (14) for emitting X rays by the collision of the electron beam (e). A bias voltage (Vb) is impressed between the cathode electrode (15) and the grid electrode (17) from a bias voltage generating section (20). A tube voltage (Vt) is impressed on the anode target (13) from a tube voltage generating section (19). A voltage dividing section (31) divides the tube voltage (Vt) to generate a focus voltage (Vf). The effect of a variation in voltage on the formation of a focal point of the electron beam is suppressed by impressing such a focus voltage (Vf) on the focus electrode (18).

Abstract translation: X射线发生器包括阴极电极（15），用于控制由阴极电极（15）产生的电子束（e）的栅电极（17），用于聚焦电子束（e）的聚焦电极（18） ，以及用于通过电子束（e）的碰撞而发射X射线的阳极靶（14）。 偏置电压（Vb）从偏置电压产生部分（20）施加到阴极电极（15）和栅电极（17）之间。 管电压（Vt）从管电压产生部分（19）施加到阳极靶（13）上。 分压部（31）分割管电压（Vt），生成聚焦电压（Vf）。 通过在聚焦电极（18）上施加聚焦电压（Vf）来抑制电压变化对电子束焦点形成的影响。

公开(公告)号：US06570958B2

公开(公告)日：2003-05-27

申请号：US10198613

申请日：2002-07-18

Applicant: Joachim Brendler

Inventor： Joachim Brendler

IPC: H05G110

CPC classification number: H01J35/045 ,  H05G1/26

Abstract: The invention relates to an X-ray system/generator in which after the end of an X-ray exposure the grid of th X-ray tube is blocke4d as long as the X-ray exposure is read out from a detector (or as long a film or a PCR is removed from the X-rays). After read out, the grid is released so that the system capacitance may be discharged via the X-ray tube. Thereby over-exposure due to energy stored in the sytem- and cable capacities is avoided (which is a problem especially for thin objects), and the system may be switched from a tube with grid to a tube without grid without problems.

Abstract translation: 本发明涉及一种X射线系统/发生器，其中在X射线曝光结束之后，只要从检测器读出X射线曝光（或长时间），X射线管的栅格被阻挡 从X射线去除膜或PCR）。 读出后，电网被释放，使得系统电容可以通过X射线管放电。因此避免了由于存储在系统和电缆容量中的能量而导致的过度曝光（这对于薄物体尤其如此） ，并且可以将系统从具有栅格的管切换到没有栅格的管而没有问题。

公开(公告)号：US12125661B2

公开(公告)日：2024-10-22

申请号：US17872782

申请日：2022-07-25

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Yoon-Ho Song ,  Jun-Tae Kang ,  Jae-Woo Kim ,  Sora Park ,  Jin-Woo Jeong

IPC: H01J35/06 ,  H01J35/04 ,  H01J35/10

CPC classification number: H01J35/064 ,  H01J35/045 ,  H01J35/10

Abstract: Provided is an X-ray tube including a cathode structure, an anode spaced apart from the cathode structure, a spacer structure disposed between the cathode structure and the anode, and an external power supply connected to each of the cathode structure, the anode, and the spacer structure. Here, the spacer structure includes a first spacer disposed adjacent to the cathode structure and a second spacer disposed on the first spacer and disposed adjacent to the anode. The first spacer includes a first portion adjacent to the cathode structure and a second portion adjacent to a contact point of the first spacer and the second spacer. The second spacer includes a third portion adjacent to the contact point and a fourth portion adjacent to the anode. Each of the first portion and the third portion has a volume resistivity less than that of the second portion.

公开(公告)号：US20190074154A1

公开(公告)日：2019-03-07

申请号：US15694657

申请日：2017-09-01

Applicant: Varex Imaging Corporation

Inventor： Colton B. Woodman ,  Brad D. Canfield

IPC: H01J29/96 ,  H01J29/62 ,  H01J29/48 ,  H01J35/14 ,  H05G1/08

CPC classification number: H01J29/96 ,  H01J29/48 ,  H01J29/62 ,  H01J35/045 ,  H01J35/14 ,  H05G1/085

Abstract: Some embodiments include a system, comprising: a high voltage enclosure; a cathode disposed in the high voltage enclosure; an anode disposed in the high voltage enclosure; a plurality of grids disposed in the high voltage enclosure between the cathode and the anode; a voltage source configured to generate a common grid voltage; and a voltage divider disposed in the high voltage enclosure, configured to generate a plurality of grid voltages based on the common grid voltage, and configured to apply at least two of the grid voltages to the grids.

公开(公告)号：US20180277331A1

公开(公告)日：2018-09-27

申请号：US15921774

申请日：2018-03-15

Applicant: YXLON INTERNATIONAL GMBH

Inventor： Lothar Schultheis ,  Bjoern Schrader

IPC: H01J35/16 ,  H01J35/22 ,  H01J35/06 ,  H01J35/14 ,  H01J35/04

CPC classification number: H01J35/165 ,  H01J1/15 ,  H01J1/90 ,  H01J35/045 ,  H01J35/06 ,  H01J35/14 ,  H01J35/22 ,  H01J2235/0233 ,  H01J2235/06

Abstract: A receptacle for receiving a plug connector of a high-voltage cable for a microfocus X-ray tube with a cathode, which has a metal filament and grid. The receptacle has a ceramic insulator with three contiguous cavities. The first cavity near the filament includes electrical contacts for the filament and the grid. The second cavity includes spring contacts for supplying current to the filament and a center pin for supplying voltage to the grid. The third cavity receives the plug connector. The insulator has a removable grid cap which is conductively connected to the grid of the cathode. The first and second cavities are surrounded in the radial direction by the grid cap, An air gap extends radially between grid cap and ceramic body. At the end of the grid cap remote from the filament is a circumferential groove in the axial direction between the grid cap and the ceramic insulator.