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公开(公告)号：US11114268B2
公开(公告)日：2021-09-07
申请号：US16073290
申请日：2016-12-28
Applicant: CANON KABUSHIKI KAISHA
Inventor： Kazuya Tsujino
Abstract: The present disclosure provides a reliable X-ray generating tube that forms a focus with a stable size and shape. The X-ray generating tube includes an electron gun including an electron emitting portion, a plurality of grid electrodes, and an insulating support member that supports the plurality of grid electrodes. The electron gun includes a conductive section that hides the insulating support member to prevent the insulating support member from being directly viewed from an electron through path of electrons emitted from the electron emitting portion and passing through the grid electrodes.
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公开(公告)号：US11109473B2
公开(公告)日：2021-08-31
申请号：US16969725
申请日：2019-02-19
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： Roger Steadman Booker , Gereon Vogtmeier
Abstract: An X-ray source (10) for emitting an X-ray beam (101) is proposed. The X-ray source (10) comprises an anode (12) and an emitter arrangement (14) comprising a cathode (16) for emitting an electron beam (15) towards the anode (12) and an electron optics (18) for focusing the electron beam (15) at a focal spot (20) on the anode (12). The X-ray source (10) further comprises a controller (22) configured to determine a switching action of the emitter arrangement (14) and to actuate the emitter arrangement (14) to perform the switching action, the switching action being associated with a change of at least one of a position of the focal spot (20) on the anode (12), a size of the focal spot (20), and a shape of the focal spot (20). The controller (22) is further configured to predict before the switching action is performed, based on the determined switching action, the size and the shape of the focal spot (20) expected after the switching action. Further, the controller (22) is configured to actuate the electron optics (18) to compensate for a change of the size and the shape of the focal spot (20) induced by the switching action.
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公开(公告)号：US11101097B2
公开(公告)日：2021-08-24
申请号：US16610879
申请日：2018-07-11
Applicant: THALES
Inventor： Pascal Ponard
Abstract: A source for generating ionizing radiation and in particular x-rays, to an assembly includes a plurality of sources and to a process for producing the source. The source comprises: a vacuum chamber; a cathode that is able to emit an electron beam into the chamber; an anode that receives the electron beam and that comprises a target that is able to generate ionizing radiation from the energy received from the electron beam; an electrode that is placed in the vicinity of the cathode and that allows the electron beam to be focused; a stopper ensuring the seal tightness of the vacuum chamber; and a mechanical part that is made of dielectric and that forms a portion of the vacuum chamber; and the stopper is fastened to the mechanical part by means of a conductive brazing film that is used to electrically connect the electrode.
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公开(公告)号：US20210249213A1
公开(公告)日：2021-08-12
申请号：US16786197
申请日：2020-02-10
Applicant: Richardson Electronics, Ltd.
Inventor： Min He , Norman Wandke , Brice Youngren , Thomas Muchowicz
Abstract: An electron collector for an x-ray tube having an electron collector base and an electron collector insert. The electron collector insert may be composed of a thermally enhanced material and is used to mitigate thermal stress from the electron collector. The electron collector insert may further prevent cracking and thermal fatigue of the electron collector.
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公开(公告)号：US20210231590A1
公开(公告)日：2021-07-29
申请号：US17160479
申请日：2021-01-28
Applicant: CANON MEDICAL SYSTEMS CORPORATION
Inventor： Yu SASAKI
IPC: G01N23/046 , H01J35/06 , H01J35/04 , H05G1/08 , H01J35/08
Abstract: According to one embodiment, an X-ray CT apparatus includes processing circuitry. The processing circuitry is configured to acquire set tube current waveform, and specify, based on the set tube current waveform, a period of a first tube current and a period of a second tube current lower than the first tube current. The processing circuitry is further configured to determine a waveform of a grid voltage such that a first grid voltage is applied during a period corresponding to the period of the first tube current and a second grid voltage, which is higher than the first grid voltage, is applied during a period corresponding to the period of the second tube current.
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Patent Agency Ranking
公开(公告)号：US11043351B2
公开(公告)日：2021-06-22
申请号：US16621402
申请日：2018-06-14
Applicant: KONINKLIJKE PHILIPS N.V.
Inventor： Rolf Karl Otto Behling , Tobias Schlenk , Thorben Repenning
Abstract: An X-ray source (10) for generating X-rays (11) is provided. The X-ray source (10) comprises an emitter arrangement (12) for generating electrons or for generating X-rays, at least one feedthrough (38) for supplying electrical power to the emitter arrangement (12), and an insulator (20) configured for isolating an electrical potential of the at least one feedthrough (38) from a ground potential. Therein, the at least one feedthrough (38) extends at least partly through the insulator (20), and at least a part of the insulator (20) is in thermal contact with at least a part of the emitter arrangement (12). Further, the insulator (20) comprises at least one cooling channel (28) formed completely in an interior volume (25) of the insulator (20) and configured to dissipate heat from the emitter arrangement (12), wherein a distance (29) between an outer surface (26) of the insulator (20) and the cooling channel (28) is at least as large as half of a thickness (27) of the cooling channel (20).
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公开(公告)号：US11037751B2
公开(公告)日：2021-06-15
申请号：US16372609
申请日：2019-04-02
Applicant: CANON ELECTRON TUBES & DEVICES CO., LTD.
Inventor： Tomonari Ishihara
Abstract: According to one embodiment, an X-ray tube includes an anode target, a cathode including a first filament and a converging electrode, and a vacuum envelope. The converging electrode includes a flat front surface, a flat first surface, a first groove portion, and a pair of first protruding portions. The pair of first protruding portions is formed to protrude from the first surface toward the front surface and sandwich the first groove portion in a first length direction. An upper surface is formed of a plurality of flat inclined surfaces.
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公开(公告)号：US20210176850A1
公开(公告)日：2021-06-10
申请号：US17111764
申请日：2020-12-04
Applicant: Hologic, Inc.
Inventor： Guoyun Ru
Abstract: An x-ray tube having at least one focusing cup and an anode. The x-ray tube may have a first filament positioned in a first location between the focusing cup and the anode, the first filament having a first size, and a second filament positioned in a second location between the focusing cup and anode, the second filament having a second size that is substantially the same as the first size. The x-ray tube may also include a switching mechanism configured to engage the second filament upon failure of the first filament.
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公开(公告)号：US20210151272A1
公开(公告)日：2021-05-20
申请号：US17093896
申请日：2020-11-10
Inventor： Sora PARK
IPC: H01J35/06
Abstract: An electron emission structure according to embodiments of the inventive concept includes a cathode electrode and electron emission yarns each having a yarn shape and disposed in the cathode electrode. Here, the cathode electrode includes a plurality of first conductive panels spaced apart from each other in a first direction and at least one second conductive panel that crosses the first conductive panels in the first direction. Also, each of the first conductive panels includes at least one groove at an upper portion thereof. The second conductive panel is inserted to the groove of each of the first conductive panels. Each of the electron emission yarns is disposed between the first conductive panels. Each of the electron emission yarns contacts the second conductive panel. Each of the electron emission yarns is mechanically fixed and vertically aligned as well as arranged regularly by the second conductive panel and one pair of adjacent first conductive panels of the first conductive panels.
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公开(公告)号：US20210148840A1
公开(公告)日：2021-05-20
申请号：US17137064
申请日：2020-12-29
Applicant: Zhili CUI , Jian GAO , Jinhui XING
Inventor： Zhili CUI , Jian GAO , Jinhui XING
IPC: G01N23/046 , H01J35/06 , H01J35/04 , H01J35/18 , H01J35/08
Abstract: Provided are a scanning-type X-ray source and an imaging system therefor. The scanning-type X-ray source comprises a vacuum cavity (1), wherein a cathode (2) and a plurality of anode target structures (3) are arranged in the vacuum cavity (1); a gate electrode (4) is arranged in a position, close to the cathode (2), in the vacuum cavity (1); a focusing electrode (5) is arranged in a position, close to the gate electrode (4), in the vacuum cavity (1); and a deflection coil (6) is arranged in a position, close to the gate electrode (4), at the outer periphery of the vacuum cavity (1). The scanning-type X-ray source generates electron beams by using cathode (2), controls the powering-on/off of the electron beams by the gate electrode (4), and the deflection coil (6) controls the direction of motion of the electron beams, so as to complete the switching between multiple focuses.
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