公开(公告)号：US07406154B2

公开(公告)日：2008-07-29

申请号：US10541563

申请日：2004-01-05

Applicant: Theodore A Resnick

Inventor： Theodore A 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: 剂量调制的照射系统包括具有用于产生电子的至少一个细丝（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：US20040114722A1

公开(公告)日：2004-06-17

申请号：US10469769

申请日：2003-09-04

Inventor： Takashi Shimono

IPC: H05G001/32 ,  H01J035/14

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：US20030021380A1

公开(公告)日：2003-01-30

申请号：US10198613

申请日：2002-07-18

Inventor： Joachim Brendler

IPC: G21K001/00

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（特别是对于薄物体是一个问题），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：US20230181139A1

公开(公告)日：2023-06-15

申请号：US18106286

申请日：2023-02-06

Applicant: VARIAN MEDICAL SYSTEMS, INC.

Inventor： Arundhuti GANGULY ,  Gary F. VIRSHUP ,  Michelle RICHMOND ,  Billy Dan JONES

IPC: A61B6/00 ,  H05G1/58 ,  G21K1/10 ,  H05G1/60

CPC classification number: A61B6/484 ,  H05G1/58 ,  A61B6/482 ,  G21K1/10 ,  H05G1/60 ,  H01J35/045

Abstract: A system can have an x-ray source that generates a series of individual x-ray pulses for multi-energy imaging. A first x-ray pulse can have a first energy level and a subsequent second x-ray pulse in the series can have a second energy level different from the first energy level. An x-ray imager can receive the x-rays from the x-ray source and can detect the received x-rays for image generation. A generator interface box (GIB) controls the x-ray source to provide the series of individual x-ray pulses and synchronizes detection by the x-ray imager with generation of the individual x-ray pulses. The GIB can control x-ray pulse generation and synchronization to optimize image generation while minimizing unnecessary x-ray irradiation.

公开(公告)号：US20190189384A1

公开(公告)日：2019-06-20

申请号：US15845046

申请日：2017-12-18

Applicant: VAREX IMAGING CORPORATION

Inventor： Colton B. Woodman ,  Christopher M. Lewis

IPC: H01J35/04 ,  H01J35/06 ,  H05G1/30 ,  H01J35/10 ,  H05G1/02

CPC classification number: H01J35/045 ,  H01J35/06 ,  H01J35/101 ,  H01J2201/304 ,  H05G1/02 ,  H05G1/30

Abstract: A bipolar grid may be positioned between a cathode and an anode. The bipolar grid may receive a positive grid voltage that corresponds to a voltage in an electric field between the cathode and the anode such that the grid does not interfere with an electron beam generated by an electron emitter of the cathode. The bipolar grid may receive a negative grid voltage to isolate the electron emitter such that the electron beam does not reach the anode.

公开(公告)号：US09934932B2

公开(公告)日：2018-04-03

申请号：US15331251

申请日：2016-10-21

Applicant: Wisconsin Alumni Research Foundation

Inventor： Thomas R. Mackie ,  Brandon J. Walker ,  Jonathon R. Seaton

IPC: H01J35/08 ,  H01J35/14 ,  A61B6/03 ,  A61B6/00 ,  H01J35/04 ,  H01J35/06 ,  H01J35/12 ,  A61B6/06 ,  H01J35/00 ,  H01J35/30 ,  A61N5/10

CPC classification number: H01J35/14 ,  A61B6/032 ,  A61B6/035 ,  A61B6/06 ,  A61B6/40 ,  A61B6/4007 ,  A61B6/4014 ,  A61B6/4021 ,  A61B6/405 ,  A61B6/4488 ,  A61B6/482 ,  A61N5/1077 ,  H01J35/00 ,  H01J35/045 ,  H01J35/06 ,  H01J35/12 ,  H01J35/30 ,  H01J2235/068 ,  H01J2235/1204 ,  H01J2235/1262 ,  H01J2235/127

Abstract: An imaging module includes a plurality of cathodes and respective gates, each cathode configured to generate a separate beam of electrons directed across a vacuum chamber and each gate matched to at least one respective cathode to enable and disable each separate beam of electrons from being directed across the vacuum chamber. A target anode is fixed within the vacuum chamber and arranged to receive the separate beam of electrons from each of the plurality of cathodes and, therefrom, generate a beam of x-rays. A deflection system is arranged between the plurality of cathodes and the target anode to generate a variable magnetic field to control a path followed by each of the separate beams of electrons to the target anode.

公开(公告)号：US09779907B2

公开(公告)日：2017-10-03

申请号：US14607942

申请日：2015-01-28

Applicant: VARIAN MEDICAL SYSTEMS, INC.

Inventor： Bradley D. Canfield

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

CPC classification number: H01J35/045 ,  H01J9/042 ,  H01J9/18 ,  H01J35/06 ,  H01J35/14 ,  H01J2235/06 ,  H01J2235/068

Abstract: A cathode head can include: a first electron emitter filament having a first size; a first grid pair defining walls of a first filament slot having the first filament therein, each grid member of the first grid pair being electronically coupled to different voltage sources; a second electron emitter filament; and a second grid pair defining walls of a second filament slot having the first electron emitter therein, each grid member of the second grid pair being electronically coupled to different voltage sources. The first grid pair can have a first and second grid members; and the second grid pair can have the second grid member and a third grid member. The first grid member and third grid member are electronically coupled to the same voltage source and the second grid member being electronically coupled to a different voltage source.

公开(公告)号：US20170053771A1

公开(公告)日：2017-02-23

申请号：US15230276

申请日：2016-08-05

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Jin-Woo JEONG ,  Yoon-Ho SONG

IPC: H01J35/06 ,  H01J35/08

CPC classification number: H01J35/065 ,  H01J35/045 ,  H01J35/16 ,  H01J2235/168

Abstract: Disclosed is an X-ray source, including: a cathode; an anode positioned on the cathode so as to face the cathode; emitters formed on the cathode; a gate electrode positioned between the cathode and the anode and including openings at positions corresponding to those of the emitters; an insulating spacer formed between the gate and the anode; and a coating layer formed on an internal wall of the insulating spacer, and including a material having a lower secondary electron emission coefficient than that of the insulating spacer.

Abstract translation: 公开了一种X射线源，包括：阴极; 阳极，其位于阴极上以面对阴极; 在阴极上形成的发射体; 位于阴极和阳极之间的栅电极，并且在对应于发射器的位置处包括开口; 形成在栅极和阳极之间的绝缘间隔物; 以及形成在所述绝缘间隔物的内壁上的涂层，并且包括具有比所述绝缘间隔物的二次电子发射系数低的二次电子发射系数的材料。

公开(公告)号：US09484179B2

公开(公告)日：2016-11-01

申请号：US13718285

申请日：2012-12-18

Applicant: General Electric Company

Inventor： Mark Alan Frontera ,  Peter Andras Zavodszky

IPC: H01J35/14 ,  H01J35/06 ,  H01J35/04 ,  A61B6/03

CPC classification number: H01J35/14 ,  A61B6/032 ,  H01J35/045 ,  H01J35/06

Abstract: An X-ray tube includes an emitter, and an electrode assembly. The emitter is configured to emit an electron beam toward a target. The electrode assembly includes at least one electrode having a bias voltage with respect to the emitter. At least one electrode of the electrode assembly is a segmented electrode including a plurality of segments. The plurality of segments includes a first member and a second member. The first member is configured to have a first bias voltage and the second member is configured to have a second bias voltage that is different from the first bias voltage.

Abstract translation: X射线管包括发射器和电极组件。 发射极被配置为向靶发射电子束。 电极组件包括至少一个具有相对于发射极的偏置电压的电极。 电极组件的至少一个电极是包括多个段的分段电极。 多个段包括第一构件和第二构件。 第一构件被配置为具有第一偏置电压，并且第二构件被配置为具有不同于第一偏置电压的第二偏置电压。

公开(公告)号：US09431206B2

公开(公告)日：2016-08-30

申请号：US14193601

申请日：2014-02-28

Applicant: CANON KABUSHIKI KAISHA

Inventor： Kazuya Tsujino ,  Kazuyuki Ueda

IPC: H01J35/04 ,  H01J35/14 ,  G21K1/02

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。