公开(公告)号：US08401151B2

公开(公告)日：2013-03-19

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: H01J35/14

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：US08320521B2

公开(公告)日：2012-11-27

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：US20120152722A1

公开(公告)日：2012-06-21

申请号：US13175707

申请日：2011-07-01

Applicant: Curtis A Birnbach ,  William H. Joyce ,  Mark L. Manewitz

Inventor： Curtis A Birnbach ,  William H. Joyce ,  Mark L. Manewitz

IPC: B01J19/12 ,  B01J19/00

CPC classification number: H01J35/06 ,  B01J4/004 ,  B01J19/085 ,  B01J19/125 ,  B01J2219/00164 ,  B01J2219/00198 ,  B01J2219/00211 ,  B01J2219/00231 ,  C01B17/745 ,  C01D3/04 ,  H01J35/045 ,  H01J35/08 ,  H01J35/14 ,  H01J35/16 ,  H01J35/18 ,  H01J2235/087 ,  H01J2235/163 ,  H01J2235/166 ,  H01J2235/186

Abstract: A method for inducing chemical reactions using X-ray radiation comprises generating an irradiation volume within the interior of a reaction vessel by introducing X-ray radiation into the volume, in which two or more reactants are introduced. With respect to the two or more reactants and any subsequently created intermediate reactant or reactants, the aggregate extent to which the foregoing reactants are to be ionized to any degree is selectively controlled, and the average degree of ionization in the irradiation volume, from partial to total, of that portion of the foregoing reactants which is to be ionized is selectively controlled, through control of the fluence and energy of the X-ray radiation, to thereby induce selective reactions of reactants to occur in the irradiation volume. One or more reactants may be delivered through a double-walled pipe containing X-ray shielding to prevent their premature irradiation before being injected into the irradiation volume.

Abstract translation: 使用X射线辐射诱导化学反应的方法包括通过将X射线辐射引入其中引入两种或更多种反应物的体积来在反应容器的内部产生照射体积。 对于两种或更多种反应物和任何随后产生的中间体反应物或反应物，上述反应物在任何程度上被离子化的聚集程度被选择性地控制，并且照射体积中的平均离子化程度从部分到 通过控制X射线辐射的能量密度和能量来选择性地控制上述被离子化的反应物的那一部分的总和，从而诱导反应物在照射体积中发生选择性反应。 一个或多个反应物可以通过含有X射线屏蔽的双壁管道输送，以防止其在注入照射体积之前过早照射。

公开(公告)号：US20110080992A1

公开(公告)日：2011-04-07

申请号：US12965968

申请日：2010-12-13

Applicant: Ehud DAFNI

Inventor： Ehud DAFNI

IPC: A61B6/03

CPC classification number: A61B6/4085 ,  A61B6/032 ,  A61B6/4007 ,  A61B6/4014 ,  A61B6/4028 ,  A61B6/4291 ,  H01J35/045 ,  H05G1/70

Abstract: An X-ray source system for a CT scanner includes a plurality of X-ray sources, wherein each X-ray source of the plurality is provided with a cathode from which an electron beam is emitted, an anode to receive the electron beam and at least one grid electrode, wherein the grid electrodes are configured to selectably block radiation from said X-ray sources; a high voltage generator for applying voltage to the plurality of X-ray sources, wherein each of the plurality of X-ray sources are configured to present substantially the same load to the high voltage generator; a grid modulator configured to apply voltage to grid electrodes of each of the plurality of X-ray sources in turn; and a controller for controlling the grid modulator so that only one of the plurality of X-ray sources emits radiation at any one time.

Abstract translation: 用于CT扫描仪的X射线源系统包括多个X射线源，其中，多个X射线源中的每个X射线源设置有阴极，从该阴极发射电子束，接收电子束的阳极和 至少一个栅电极，其中所述栅电极被配置为可选择地阻挡来自所述X射线源的辐射; 用于向所述多个X射线源施加电压的高电压发生器，其中，所述多个X射线源中的每一个被配置为向所述高压发生器施加大致相同的负载; 电网调制器，其被配置为依次将电压施加到所述多个X射线源中的每一个的栅电极; 以及控制器，用于控制所述电网调制器，使得所述多个X射线源中的仅一个在任何一个时间发射辐射。

公开(公告)号：US20110038460A1

公开(公告)日：2011-02-17

申请号：US12857676

申请日：2010-08-17

Applicant: Michael Grasruck ,  Andreas Schaller

Inventor： Michael Grasruck ,  Andreas Schaller

IPC: H01J35/14

CPC classification number: H01J35/14 ,  H01J35/045 ,  H05G1/38

Abstract: A device to control an electron beam for the generation of x-ray radiation, has an electron emitter to generate an electron beam, to which emitter an emitter voltage can be applied, a diaphragm, at least two control elements associated with the diaphragm to affect the electron beam, and switching arrangement with which at least two different electrical voltages can be applied to the at least two control elements. The same electrical voltage is applied to each of the at least two control elements. Upon switching the voltage, an electrical circuit that delays the setting of the respective voltage at the one control element is associated with the connection line of the one control element with the switching arrangement to switch over the voltage. The invention moreover concerns an operating method for the device and an x-ray tube provided with the device.

Abstract translation: 用于控制用于产生X射线辐射的电子束的装置具有电子发射器以产生电子束，发射极可以施加到发射极电压，隔膜，与隔膜相关联的至少两个控制元件影响 电子束以及可以向至少两个控制元件施加至少两个不同电压的开关装置。 对于至少两个控制元件中的每一个施加相同的电压。 在切换电压时，延迟在一个控制元件处的相应电压的设置的电路与一个控制元件的连接线与开关装置相关联以切换电压。 本发明还涉及该装置的操作方法和设置有该装置的X射线管。

公开(公告)号：US20090316855A1

公开(公告)日：2009-12-24

申请号：US12485897

申请日：2009-06-16

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

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

IPC: G01N23/00 ,  A61B6/03

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

Abstract: The present invention is an X-ray scanning system having at least one multi-focus X-ray tubes spaced around an axis and arranged to emit X-rays through an object on the axis. The emitted X-rays are detected by sensors. Each multi-focus X-ray tube can emit X-rays from a plurality of source positions. In an exemplary scanning cycle, each of the source positions in each X-ray tube is used at least once and ordered to minimize the thermal load on the tubes.

Abstract translation: 本发明是一种X射线扫描系统，其具有至少一个围绕轴线间隔的多焦点X射线管，并被布置成通过轴上的物体发射X射线。 发射的X射线被传感器检测到。 每个多焦点X射线管可以从多个源位置发射X射线。 在示例性的扫描周期中，每个X射线管中的每个源位置被使用至少一次并被排序以最小化管上的热负载。

公开(公告)号：US07440547B2

公开(公告)日：2008-10-21

申请号：US11402845

申请日：2006-04-13

Applicant: Fumio Ishiyama

Inventor： Fumio Ishiyama

IPC: H05G1/10 ,  H05G1/22 ,  H05G1/00

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。

公开(公告)号：US5268955A

公开(公告)日：1993-12-07

申请号：US862805

申请日：1992-04-08

Applicant: James E. Burke ,  Lester Miller

Inventor： James E. Burke ,  Lester Miller

IPC: H01J35/06 ,  H01J35/16 ,  H01J35/24 ,  H01J35/26 ,  H05G1/08 ,  H05G1/20 ,  H05G1/34 ,  H05G1/52 ,  H05G1/66 ,  H01J35/04

CPC classification number: H01J35/045 ,  H01J35/06 ,  H01J35/165 ,  H01J35/24 ,  H05G1/025 ,  H05G1/08 ,  H05G1/20 ,  H05G1/34 ,  H05G1/52 ,  H05G1/66 ,  H01J2235/162

Abstract: A toroidal x-ray tube housing (A) has an evacuated interior. An annular anode (B) is connected with the housing closely adjacent the window such that a cooling fluid passage (12) is defined in intimate thermal communication with the anode. A cathode assembly (32) is mounted within the evacuated housing or an annular ring (30) that rotates an electron beam (22) around the large diameter annular anode. In the embodiment of FIGS. 1 and 2, the annular ring is magnetically levitated (40) and rotated by a motor (50). A collimator (62) and filter (64) are rotated with the cathode assembly closely adjacent an electron emitter or cathode cup (32) such that the generated x-rays are collimated and filtered within the x-ray tube. Preferably, a plurality of cathode cups (120) are provided, whose operation is selected by a series of magnetically controlled switches (76). The cathode cup is insulated (106) from the annular ring and isolated by a transformer (104, 112) from the filament current control switches. In the embodiment of FIGS. 4-6, the cathode assembly (C) includes a multiplicity of stationarily mounted electron cups (120) which are selectively actuated to rotate the electrode beam by a switch (130). An electron beam scan control (134) may bias the potential applied to grids (124, 126) to scan the electron beam generated by electron emitter over a commensurate arc length of the anode with the arc length of the emitter. In the embodiment of FIG. 7 , multiple anode surface as well as multiple cathode cups are provided.

Abstract translation: 环形X射线管外壳（A）具有抽真空的内部。 环形阳极（B）与壳体紧邻窗口连接，使得冷却流体通道（12）被定义成与阳极紧密热连通。 阴极组件（32）安装在抽真空壳体内，或环形环（30），其围绕大直径环形阳极旋转电子束（22）。 在图1和图2的实施例中 如图1和图2所示，环形环被磁悬浮（40）并由电动机（50）旋转。 准直器（62）和过滤器（64）随着阴极组件靠近电子发射器或阴极杯（32）而旋转，使得所产生的x射线在x射线管内被准直和过滤。 优选地，提供多个阴极杯（120），其操作由一系列磁控开关（76）选择。 阴极杯与环形环绝缘（106），并与灯丝电流控制开关的变压器（104,112）隔离。 在图1和图2的实施例中 如图4-6所示，阴极组件（C）包括多个固定安装的电子杯（120），其被选择性地致动以通过开关（130）旋转电极束。 电子束扫描控制（134）可以偏置施加到栅极（124,126）上的电位，以扫描由电子发射器产生的与发射极的电弧长度相当的阳极长度的电子束。 在图1的实施例中 如图7所示，提供多个阳极表面以及多个阴极杯。

公开(公告)号：US20240234075A1

公开(公告)日：2024-07-11

申请号：US18554872

申请日：2022-04-12

Applicant: NCX Corporation

Inventor： Jian ZHANG

IPC: H01J35/06 ,  H01J9/18 ,  H01J35/04 ,  H01J35/14

CPC classification number: H01J35/065 ,  H01J9/18 ,  H01J35/045 ,  H01J35/147

Abstract: A field emission cathode device includes a cathode element having a field emission surface and an adjacent gate electrode clement defining a first gap therebetween. A gate voltage applied to the gate electrode clement causes the field emission surface to emit electrons that are accelerated through the gate electrode element. The gate electrode element is disposed between the cathode element and an anode element. the anode element having an anode voltage applied thereto to attract the electrons emitted through the gate electrode element. A tuning electrode element is disposed between the gate electrode element and the anode element. The tuning electrode element has a tuning voltage applied thereto to decelerate the electrons directed through the gate electrode element and to direct the electrons therethrough toward the anode element. An associated method of forming a field emission cathode device is also provided.

公开(公告)号：US11899159B2

公开(公告)日：2024-02-13

申请号：US16838490

申请日：2020-04-02

Applicant: Schlumberger Technology Corporation

Inventor： Jani Reijonen ,  Kevin McFarland

IPC: G01V5/08 ,  G01V5/12 ,  H01J29/48 ,  H05H5/06 ,  H01J35/06 ,  H01J35/04 ,  H01J35/14 ,  H05G1/08 ,  H01J35/32 ,  H01J35/18 ,  H01J35/16 ,  H01J35/08

CPC classification number: G01V5/08 ,  G01V5/125 ,  H01J29/481 ,  H01J35/045 ,  H01J35/064 ,  H01J35/14 ,  H01J35/16 ,  H01J35/186 ,  H01J35/32 ,  H05G1/085 ,  H05H5/06 ,  H01J35/116

Abstract: A beam injector may include a cathode emitter to emit electrons and an electrode to bias at least a portion of the electrons to remain on the cathode emitter and focus the emitted electrons into an electron beam. The beam injector may also include a resistor coupled between the cathode emitter and the electrode and configured to allow self-regulation of a voltage potential on the electrode based at least in part on a current of the electron beam.