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    Electronic focal spot alignment of an x-ray tube
    85.
    发明授权
    Electronic focal spot alignment of an x-ray tube 有权

    公开(公告)号：US10383202B2

    公开(公告)日：2019-08-13

    申请号：US15141191

    申请日：2016-04-28

    Applicant: Varex Imaging Corporation

    Inventor： Bradley D Canfield ,  Michael Meiler ,  Colton B Woodman ,  Inwoo Yoon

    IPC: H01J35/00 ,  H05G1/52 ,  H01J35/14 ,  H01J35/06 ,  H01J35/08 ,  A61B6/03 ,  A61B6/00 ,  H01J35/30

    Abstract: Technology is described for electronically aligning a central ray of an x-ray tube to a radiation detector. In an example, an x-ray system includes an x-ray tube and a tube control unit (TCU). The x-ray tube includes a cathode that includes an electron emitter configured to emit an electron beam, an anode configured to receive the electron beam and generate x-rays with a central ray from electrons of the electron beam colliding on a focal spot of the anode, and a steering magnetic multipole between the cathode and the anode that is configured to produce a steering magnetic field from a steering signal. At least two poles of the steering magnetic multipole are on opposite sides of the electron beam. The TCU includes at least one steering driver configured to generate the steering signal. The TCU is configured to convert an offset value to the steering signal.

    X-ray generating apparatus and radiography system
    86.
    发明授权
    X-ray generating apparatus and radiography system 有权

    公开(公告)号：US10361057B2

    公开(公告)日：2019-07-23

    申请号：US15216523

    申请日：2016-07-21

    Applicant: CANON KABUSHIKI KAISHA

    Inventor： Koichi Tsunoda ,  Koji Yamazaki ,  Shuji Aoki ,  Kazuyuki Ueda

    IPC: H01J35/02 ,  H01J35/06 ,  H01J35/08 ,  H01J35/12 ,  H01J35/16 ,  H01J35/18 ,  G01N23/04 ,  H05G1/06 ,  A61B6/00

    Abstract: Provided is an X-ray generating apparatus, which includes: an X-ray generating tube configured to emit X-rays through a first window; an outer case configured to contain the X-ray generating tube and provided with a second window transmitting the X-rays at a position facing the first window; an insulating fluid with which an unoccupied space of the outer case is filled; an insulating member located between the first window and the second window and provided with an opening in an irradiation area of the X-ray through the first window; and an insulating third window removably fit into the opening of the insulating member, wherein a linear expansion coefficient of the third window is greater than a linear expansion coefficient of the insulating member, and the third window and the first window face each other via a gap through which the insulating fluid is flowable.

    X-RAY SOURCE
    87.
    发明申请
    X-RAY SOURCE 审中-公开

    公开(公告)号：US20190214216A1

    公开(公告)日：2019-07-11

    申请号：US16358370

    申请日：2019-03-19

    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

    Inventor： Jin-Woo JEONG ,  Yoon-Ho SONG

    IPC: H01J35/06 ,  H01J35/04

    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.

    X-ray device
    89.
    发明授权
    X-ray device 有权

    公开(公告)号：US10319555B2

    公开(公告)日：2019-06-11

    申请号：US15117872

    申请日：2015-02-10

    Applicant: Luxbright AB

    Inventor： Qiu-Hong Hu

    IPC: G01V5/00 ,  G01N23/22 ,  H01J35/06 ,  H01J35/32 ,  G01N23/046

    Abstract: Example embodiments presented herein are directed towards an x-ray generating device. The device comprises at least one electron emitter(s) that has an electrically conductive substrate. The electrically conductive substrate comprises a coating of nanostructures. The device further comprises a heating element attached to each electrically conductive substrate. The device further comprises an electron receiving component configured to receive electrons emitted from the at least one electron emitter(s). The device also comprises an evacuated enclosure configured to house the at least one electron emitter(s), the heating element and the electron receiving component. The at least one electron emitter(s) is configured for Schottky emission when the heating element is in an on-state and the at least one electron emitter(s) is negatively biased.

    Deep channel cathode assembly
    90.
    发明授权
    Deep channel cathode assembly 有权

    公开(公告)号：US10297415B2

    公开(公告)日：2019-05-21

    申请号：US15168925

    申请日：2016-05-31

    Applicant: GENERAL ELECTRIC COMPANY

    Inventor： Anija M ,  Sergio Lemaitre

    IPC: H01J35/06 ,  H01J35/08

    Abstract: An improved cathode assembly is disclosed. The improved cathode assembly provides a deep channel for holding filament that enables generation of small focal spots, but is not limited in achieving larger focal spot sizes. The cathode assembly includes at least one deep channel and a filament arranged in a deep channel. The deep channel is configured in a cathode cup surface of the cathode assembly. The filament is arranged in the deep channel for enabling emission of electron beams from the cathode assembly.

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