公开(公告)号：US11963284B2

公开(公告)日：2024-04-16

申请号：US17610831

申请日：2020-05-06

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Heiner Daerr ,  Bernd Rudi David

IPC: H05G1/58 ,  H01J35/14 ,  H05G1/52 ,  A61B6/00 ,  G01N23/046

CPC classification number: H05G1/58 ,  H01J35/147 ,  H05G1/52 ,  A61B6/482 ,  G01N23/046

Abstract: An imaging system (202) includes an X-ray radiation source (210) configured to emit radiation that traverses an examination region. The imaging system further includes a controller (220). The controller is configured to control an X-ray tube peak voltage of the X-ray radiation source to switch between at least two different X-ray tube peak voltages during a kVp switched spectral scan. The controller is further configured to control a grid voltage of the X-ray radiation source to follow the X-ray tube peak voltage during the spectral scan. The controller adjusts the grid voltage based on a predetermined mapping between a currently applied X-ray tube peak voltage and a corresponding grid voltage for a given focal spot size, thereby maintaining the given focal spot size throughout the spectral scan.

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：US11892576B2

公开(公告)日：2024-02-06

申请号：US18155314

申请日：2023-01-17

Applicant: Excillum AB

Inventor： Per Takman ,  Tomi Tuohimaa ,  Ulf Lundström

IPC: H01J35/14 ,  H05G1/52 ,  G01T1/34

CPC classification number: G01T1/34 ,  H01J35/153 ,  H05G1/52 ,  H01J2235/082

Abstract: A method for characterizing an electron beam in a liquid metal jet X-ray source. The method includes providing the electron beam and directing the electron beam to an interaction region; providing an electron beam dump connected to ground potential for receiving the electron beam after it has traversed the interaction region; scanning the electron beam over at least part of the interaction region; measuring X-ray radiation generated by interaction between the electron beam and the electron beam dump during the scanning to obtain an X-ray profile; and calculating an electron beam characteristic based on the X-ray profile. Also, a corresponding liquid metal jet X-ray source.

公开(公告)号：US11715617B2

公开(公告)日：2023-08-01

申请号：US17407748

申请日：2021-08-20

Applicant: Arizona Board of Regents on behalf of Arizona State University

Inventor： William Graves ,  Mark Holl

IPC: H01J35/14 ,  H05G1/02 ,  H05G1/28 ,  H05G1/52 ,  H04N5/32

CPC classification number: H01J35/153 ,  H05G1/02 ,  H05G1/28 ,  H05G1/52 ,  H01J2235/08 ,  H04N5/32

Abstract: Some embodiments of the present disclosure provide a method that includes colliding a laser with an electron beam to produce backscattered x-rays while the electron beam is traversing a circular arc. This backscattering process is inverse Compton scattering (ICS). ICS x-rays are emitted in the same direction as the electrons. Because this ICS direction is changing as a function of time, the position of the x-ray beam on a detector will change depending on the timing of electron/laser collision. This position change is easily detected and converted to a timing measurement sensitive at the femtosecond scale, converting a very difficult timing measurement of laser pulse, electron pulse, and x-ray pulse synchronization into a simple and robust position measurement.

公开(公告)号：US11683879B2

公开(公告)日：2023-06-20

申请号：US17316838

申请日：2021-05-11

Applicant: Moxtek, Inc.

Inventor： Rick Steck ,  Scott Hardy ,  Vincent F. Jones

IPC: H05G1/32 ,  H05G1/20 ,  H05G1/52 ,  H05G1/30 ,  H05G1/10 ,  G01N23/04

CPC classification number: H05G1/32 ,  H05G1/10 ,  H05G1/20 ,  H05G1/30 ,  H05G1/52 ,  G01N23/04

Abstract: A raster scanning x-ray source can be light and small, and can have high resolution. A raster-assembly can be attached directly to and can encircle an x-ray tube. The raster-assembly can adjoin or can be very close to the x-ray tube, resulting in a small and lightweight scanning x-ray source. X-rays can backscatter back into the x-ray tube instead of into a detector, thus improving resolution of the resulting image. A voltage-multiplier, which can be used with the x-ray source, can include separate voltage-multiplier-stages in a stack.

公开(公告)号：US20180247787A1

公开(公告)日：2018-08-30

申请号：US15904820

申请日：2018-02-26

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Jin-Woo JEONG ,  Yoon-Ho SONG ,  Jun Tae KANG ,  Jae-Woo KIM

IPC: H01J35/14 ,  G21K1/02 ,  H05G1/52 ,  H01J35/06 ,  H01J35/16

CPC classification number: H01J35/14 ,  G21K1/02 ,  H01J35/045 ,  H01J35/06 ,  H01J35/16 ,  H01J2235/062 ,  H01J2235/16 ,  H05G1/52

Abstract: Provided is an X-ray source including a vacuum closed tube. The X-ray source includes a high voltage connection module, a tube module, and a magnetic lens system into which the tube module is inserted. The tube module includes a vacuum closed tube. The vacuum closed tube includes a cathode electrode provided at one end thereof, a nano-emitter on the cathode electrode, an anode electrode provided at the other end, and a first insulation spacer provided between the cathode electrode and the anode electrode. In addition, the vacuum closed tube includes a first conductive tube and a second conductive tube both provided between the cathode electrode and the anode electrode and separated from each other by the first insulation spacer, and a first collimator block covering an inner surface of the first insulation spacer and having a first opening.

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：US20160233046A1

公开(公告)日：2016-08-11

申请号：US15029078

申请日：2014-09-03

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Atsushi Ishii ,  Naonobu Suzuki

IPC: H01J35/08 ,  H01J35/14

CPC classification number: H01J35/08 ,  A61B6/547 ,  H01J1/88 ,  H01J1/92 ,  H01J1/94 ,  H01J3/26 ,  H01J19/32 ,  H01J19/46 ,  H01J19/48 ,  H01J21/36 ,  H01J35/14 ,  H01J35/32 ,  H01J37/1472 ,  H01J2235/08 ,  H01J2235/081 ,  H01J2235/086 ,  H01J2235/087 ,  H01J2235/088 ,  H01J2235/186 ,  H01J2237/032 ,  H01J2237/036 ,  H01J2893/0003 ,  H01J2893/0051 ,  H01J2893/0052 ,  H05G1/52

Abstract: An X-ray generation device which can be efficiently used is provided. The X-ray generation device 1 has an electron gun 3, a target unit T, a tubular portion 5, a reflected electron detector 31, and a coil unit 9, and the target unit T includes a plurality of targets 23, and a plurality of mark portions 27 having a predetermined location relationship with the targets 23 and each having a surface area larger than a surface area of the target 23, when viewed from a normal direction to principal faces of the target unit T.

Abstract translation: 提供可以有效使用的X射线产生装置。 X射线产生装置1具有电子枪3，目标单元T，管状部分5，反射电子检测器31和线圈单元9，并且目标单元T包括多个靶23和多个靶 当从目标单元T的主面观察正常方向时，与目标23具有预定位置关系并且每个具有大于目标23的表面积的表面积的标记部分27。

公开(公告)号：US20150325401A1

公开(公告)日：2015-11-12

申请号：US14491825

申请日：2014-09-19

Applicant: Rapiscan Systems, Inc.

Inventor： Willem Gerhardus Johannes Langeveld ,  Joseph Bendahan ,  Tsahi Gozani ,  Michael King ,  Dan Strellis ,  Edward Franco ,  Krystal R. Alfonso

IPC: H01J35/14 ,  G01V5/00

CPC classification number: H01J35/14 ,  G01V5/0016 ,  G21K1/093 ,  H01J35/08 ,  H01J35/30 ,  H01J35/32 ,  H01J37/14 ,  H01J37/141 ,  H01J37/147 ,  H01J37/1472 ,  H01J37/1475 ,  H01J37/3178 ,  H01J2235/081 ,  H01J2235/086 ,  H05G1/52 ,  H05G2/00

Abstract: An inspection system for scanning cargo and vehicles is described which employs an X-ray source that includes an electron beam generator, for generating an electron beam; an accelerator for accelerating said electron beam in a first direction; and, a first set of magnetic elements for transporting said electron beam into a magnetic field created by a second set of magnetic elements, wherein the magnetic field created by said second set of magnetic elements causes said electron beam to strike a target such that the target substantially only generates X-rays focused toward a high density section in the scanned object, which is estimated in a second pulse using image data captured by a detector array in a first pulse. The electron beam direction is optimized by said X-ray source during said second pulse to focus X-rays towards said high density section based on said image data in said first pulse.

Abstract translation: 描述了用于扫描货物和车辆的检查系统，其使用包括电子束发生器的X射线源，用于产生电子束; 用于在第一方向上加速所述电子束的加速器; 以及用于将所述电子束传送到由第二组磁性元件产生的磁场中的第一组磁性元件，其中由所述第二组磁性元件产生的磁场使所述电子束撞击靶，使得所述靶 基本上仅产生朝向扫描对象中的高密度部分聚焦的X射线，其以第一脉冲中由检测器阵列捕获的图像数据在第二脉冲中估计。 在所述第二脉冲期间，由所述X射线源优化电子束方向，以基于所述第一脉冲中的所述图像数据将X射线聚焦到所述高密度部分。