公开(公告)号：US11901153B2

公开(公告)日：2024-02-13

申请号：US17249558

申请日：2021-03-05

Applicant: PCT Ebeam and Integration, LLC

Inventor： Karl E. Swanson ,  John Charles Drenter ,  Paul Michael Fletcher

IPC: H01J35/08 ,  H01J35/18 ,  H01J35/12 ,  H01J35/06

CPC classification number: H01J35/116 ,  H01J35/13 ,  H01J35/18 ,  H01J35/06 ,  H01J35/186 ,  H01J2235/068 ,  H01J2235/1204 ,  H01J2235/1262 ,  H01J2235/165 ,  H01J2235/168 ,  H01J2235/18

Abstract: An x-ray apparatus includes a vacuum chamber that includes a window for exit of x-rays. Electrons are generated at a cathode within the vacuum chamber and accelerated toward a target anode associated with the window. An x-ray generating layer is included as a surface of the target anode to receive the electrons emitted by the cathode and to create x-rays. A blocking path blocks over 70% of the free electrons reaching said target anode from continuing on to exit through the window, while allowing x-rays leaving the x-ray generating layer to continue along the selectively blocking path to exit through the window. The x-ray apparatus is capable of operating at low voltage and relatively high power to reduce the necessary shielding and the corresponding weight of the apparatus yet allow more ready absorption of x-rays by items being irradiated.

公开(公告)号：US11901152B2

公开(公告)日：2024-02-13

申请号：US17874678

申请日：2022-07-27

Applicant: Siemens Healthcare GmbH

Inventor： Peter Geithner ,  Jörg Freudenberger ,  Christoph Jud ,  Anja Fritzler ,  Josef Deuringer ,  Peter Hackenschmied

IPC: H01J35/06 ,  H01J35/24 ,  A61B6/02 ,  A61B6/00 ,  H05G1/52

CPC classification number: H01J35/065 ,  H01J35/24 ,  A61B6/022 ,  A61B6/4007 ,  H01J35/064 ,  H01J2235/068 ,  H05G1/52

Abstract: Some example embodiments provide an x-ray tube for a stereoscopic imaging having an evacuated x-ray tube housing; an electron emitter apparatus in the x-ray tube housing, the electron emitter apparatus including a first field effect emitter with a first emitter surface and a second field effect emitter with a second emitter surface, at least one of the first emitter surface or the second emitter surface being segmented such that a portion of the at least one of the first emitter surface or the second emitter surface can be set relative to the respective overall emitter surface by selectively switching emitter segments of the at least one of the first emitter surface or the second emitter surface; an anode unit in the x-ray tube housing, the anode unit configured to generate x-ray radiation for the stereoscopic imaging as a function of electrons striking two focal points; and a control unit.

公开(公告)号：US11798772B2

公开(公告)日：2023-10-24

申请号：US17292695

申请日：2019-11-07

Applicant: PEKING UNIVERSITY

Inventor： Xianlong Wei

IPC: H01J35/02 ,  H01J35/14 ,  H01J9/18 ,  H01J35/12 ,  H01J35/16 ,  H01J35/18 ,  H01J35/06

CPC classification number: H01J35/025 ,  H01J35/064 ,  H01J35/16 ,  H01J35/186 ,  H01J9/18 ,  H01J35/12 ,  H01J35/147 ,  H01J2235/068

Abstract: Provided are an on-chip miniature X-ray source and a method for manufacturing the same. The on-chip miniature X-ray source includes: an on-chip miniature electron source; a first insulating spacer provided on an electron-emitting side of the on-chip miniature electron source, where the first insulating spacer has a cavity structure; and an anode provided on the first insulating spacer, where a closed vacuum cavity is formed between the on-chip miniature electron source and the anode. The on-chip miniature X-ray source has the advantages of stable X-ray dose, low working requirements for vacuum, fast switch response, capability of integration and batch fabrication, and can be used in various types of small and portable X-ray detection, analysis and treatment devices.

公开(公告)号：US20230197396A1

公开(公告)日：2023-06-22

申请号：US17558408

申请日：2021-12-21

Applicant: GE Precision Healthcare LLC

Inventor： Kevin Kruse

IPC: H01J35/14 ,  H01J1/20 ,  H01J37/075

CPC classification number: H01J35/14 ,  H01J1/20 ,  H01J37/075 ,  H01J2235/068

Abstract: Various methods and systems are provided for a cathode of an X-ray imaging system. A method for fabricating the cathode comprises machining a plurality of focusing features on a focusing element and welding the focusing element to a base assembly.

公开(公告)号：US20180190464A1

公开(公告)日：2018-07-05

申请号：US15856251

申请日：2017-12-28

Applicant: TSINGHUA UNIVERSITY ,  Nuctech Company Limited

Inventor： Wenhui HUANG ,  Dongsheng ZHANG ,  Qingxiu JIN ,  Chengjun TAN ,  Donghai LIU ,  Qun LUO ,  Chuanxiang TANG

IPC: H01J3/02

CPC classification number: H01J3/028 ,  H01J3/027 ,  H01J35/06 ,  H01J35/14 ,  H01J2235/068

Abstract: An electron gun, an X-ray source and a CT device are provided. The electron gun includes a body having a first end portion and a second end portion opposite to each other, wherein the first end portion is a connecting end portion; an internal cavity is formed in the body and has an opening positioned on the second end portion,d a cathode, a grid, a compensation electrode and a focus electrode, orderly arranged in the internal cavity in a direction from the first end portion to the second end portion.

公开(公告)号：US10014148B2

公开(公告)日：2018-07-03

申请号：US14904061

申请日：2015-08-19

Applicant: Nuctech Company Limited

Inventor： Huaping Tang ,  Zhiqiang Chen ,  Yuanjing Li ,  Yonggang Wang ,  Zhanfeng Qin

IPC: A61B6/03 ,  A61B6/04 ,  H01J37/26 ,  H01J35/06 ,  H01J35/14

CPC classification number: H01J35/065 ,  H01J3/021 ,  H01J35/14 ,  H01J2203/022 ,  H01J2203/0224 ,  H01J2203/0236 ,  H01J2235/062 ,  H01J2235/068 ,  H05G1/52

Abstract: The present disclosure is directed to an electron source and an X-ray source using the same. The electron source of the present invention comprises: at least two electron emission zones, each of which comprises a plurality of micro electron emission units, wherein the micro electron emission unit comprises: a base layer, an insulating layer on the base layer, a grid layer on the insulating layer, an opening in the grid layer, and an electron emitter that is fixed at the base layer and corresponds to a position of the opening, wherein the micro electron emission units in the same electron emission zone are electrically connected and simultaneously emit electrons or do not emit electrons at the same time, and wherein different electron emission zones are electrically partitioned.

公开(公告)号：US20170162359A1

公开(公告)日：2017-06-08

申请号：US14904061

申请日：2015-08-19

Applicant: NUCTECH COMPANY LIMITED

Inventor： Huaping Tang ,  Zhiqiang Chen ,  Yuanjing Li ,  Yonggang Wang ,  Zhanfeng Qin

IPC: H01J35/06 ,  H01J35/14

CPC classification number: H01J35/065 ,  H01J3/021 ,  H01J35/14 ,  H01J2203/022 ,  H01J2203/0224 ,  H01J2203/0236 ,  H01J2235/062 ,  H01J2235/068 ,  H05G1/52

Abstract: The present disclosure is directed to an electron source and an X-ray source using the same. The electron source of the present invention comprises: at least two electron emission zones, each of which comprises a plurality of micro electron emission units, wherein the micro electron emission unit comprises: a base layer, an insulating layer on the base layer, a grid layer on the insulating layer, an opening in the grid layer, and an electron emitter that is fixed at the base layer and corresponds to a position of the opening, wherein the micro electron emission units in the same electron emission zone are electrically connected and simultaneously emit electrons or do not emit electrons at the same time, and wherein different electron emission zones are electrically partitioned.

公开(公告)号：US09269469B2

公开(公告)日：2016-02-23

申请号：US13959527

申请日：2013-08-05

Applicant: Gabriele Suft

Inventor： Gabriele Suft

IPC: G01N1/06 ,  G21K1/06 ,  G21K1/02

CPC classification number: G21K1/06 ,  G21K1/02 ,  G21K2207/005 ,  H01J2235/068

Abstract: An arrangement for inverse x-ray phase contrast imaging includes a photon-counting x-ray detector and a multibeam x-ray tube. Focal points of the x-ray tube are collimated such that a narrow x-ray beam that is directed toward an optical axis of the arrangement and toward the x-ray detector may be generated. An active surface of the x-ray detector is at least as large as a cross-sectional surface of the narrow x-ray beam. The arrangement also includes a source grating arranged between the x-ray tube and the x-ray detector. The arrangement includes a defraction grating arranged between the source grating and the x-ray detector, and an absorption grating arranged between the defraction grating and the x-ray detector.

Abstract translation: 用于反X射线相位对比成像的装置包括光子计数X射线检测器和多光束X射线管。 准直X射线管的焦点，使得可以产生朝向配置的光轴并朝向X射线检测器的窄X射线束。 x射线检测器的有效表面至少与窄X射线束的横截面一样大。 该布置还包括布置在x射线管和x射线检测器之间的源光栅。 该装置包括设置在源光栅和X射线检测器之间的折射光栅，以及布置在折射光栅与X射线检测器之间的吸收光栅。

公开(公告)号：US20150357148A1

公开(公告)日：2015-12-10

申请号：US14635814

申请日：2015-03-02

Applicant: Rapiscan Systems, Inc.

Inventor： Edward James Morton

IPC: H01J35/12

CPC classification number: H01J35/12 ,  G21K1/02 ,  H01J35/08 ,  H01J2235/068 ,  H01J2235/08 ,  H01J2235/086 ,  H01J2235/1204 ,  H01J2235/1262

Abstract: The present application is directed to an anode for an X-ray tube. The X-ray tube has an electron aperture through which electrons emitted from an electron source travel subject to substantially no electrical field and a target in a non-parallel relationship to the electron aperture and arranged to produce X-rays when electrons are incident upon a first side of the target, wherein the target further comprises a cooling channel located on a second side of the target. The cooling channel comprises a conduit having coolant contained therein. The coolant is at least one of water, oil, or refrigerant.

Abstract translation: 本申请涉及用于X射线管的阳极。 X射线管具有电子孔，通过该电子孔，电子发射的电子基本上不受电场的影响，并且靶与电子孔非平行关系，并被布置成当电子入射到电子孔时产生X射线 所述目标的第一侧，其中所述目标还包括位于所述目标的第二侧上的冷却通道。 冷却通道包括其中包含冷却剂的导管。 冷却液是水，油或制冷剂中的至少一种。

公开(公告)号：US09053890B2

公开(公告)日：2015-06-09

申请号：US13958120

申请日：2013-08-02

Applicant: University Health Network

Inventor： Yonghai Sun ,  Tze-wei Yeow ,  David Anthony Jaffray

IPC: H01J1/304 ,  H01J1/30 ,  H01J9/02 ,  H01J35/06

CPC classification number: H01J9/025 ,  H01J1/304 ,  H01J35/065 ,  H01J2201/3043 ,  H01J2201/30449 ,  H01J2201/30469 ,  H01J2201/30496 ,  H01J2235/068 ,  Y10S977/81 ,  Y10S977/811

Abstract: Various embodiments are described herein for nanostructure field emission cathode structures and methods of making these structures. These structures generally comprise an electrode field emitter comprising a resistive layer having a first surface, a connection pad having a first surface disposed adjacent to the first surface of the resistive layer, and a nanostructure element for emitting electrons in use, the nanostructure element being disposed adjacent to a second surface of the connection pad that is opposite the first surface of the connection pad. Some embodiments also include a coaxial gate electrode that is disposed about the nanostructure element.

Abstract translation: 本文描述了用于纳米结构场发射阴极结构和制造这些结构的方法的各种实施例。 这些结构通常包括电极场发射器，其包括具有第一表面的电阻层，具有邻近电阻层的第一表面设置的第一表面的连接焊盘和用于在使用中发射电子的纳米结构元件，所述纳米结构元件被布置 邻近连接垫的与连接垫的第一表面相对的第二表面。 一些实施例还包括围绕纳米结构元件设置的同轴栅电极。