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公开(公告)号：US10290460B2
公开(公告)日：2019-05-14
申请号：US15258631
申请日：2016-09-07
Applicant: General Electric Company
Inventor： Michael John Utschig , Uwe Wiedmann , Bruno Kristiaan Bernard De Man , Sergio Lemaitre , Mark Alan Frontera , Antonio Caiafa , Jiahua Fan , Adam Budde
Abstract: An X-ray tube is provided. The X-ray tube includes an electron beam source including a cathode configured to emit an electron beam. The X-ray tube also includes an anode assembly including an anode configured to receive the electron beam and to emit X-rays when impacted by the electron beam. The X-ray tube further includes a gridding electrode disposed about a path of the electron beam between the electron beam source and the anode assembly. The gridding electrode, when powered at a specific level, is configured to grid the electron beam in synchronization with planned transitions during a dynamic focal spot mode.
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公开(公告)号：US10468222B2
公开(公告)日：2019-11-05
申请号：US15086257
申请日：2016-03-31
Applicant: General Electric Company
Inventor： Sergio Lemaitre
Abstract: In the present invention, a computed tomography system, an X-ray tube used therein and a cathode assembly disposed in the X-ray tube, as well as an associated method of use, is provided that includes a gantry and the X-ray tube coupled to the gantry. The X-ray tube includes the cathode assembly having a pair of emitters for generating an electron beam, where the pair of emitters are disposed in the casing at angles with respect to one another. The X-ray tube further includes a focusing electrode for focusing the electron beam, an extraction electrode which electrostatically controls the intensity of the electron beam, a target for generating X-rays when impinged upon by the electron beam and a magnetic focusing assembly located between the cathode assembly and the target for focusing the electron beam towards the target.
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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
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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公开(公告)号：US20180068823A1
公开(公告)日：2018-03-08
申请号：US15258631
申请日：2016-09-07
Applicant: General Electric Company
Inventor： Michael John Utschig , Uwe Wiedmann , Bruno Kristiaan Bernard De Man , Sergio Lemaitre , Mark Alan Frontera , Antonio Caiafa , Jiahua Fan , Adam Budde
Abstract: An X-ray tube is provided. The X-ray tube includes an electron beam source including a cathode configured to emit an electron beam. The X-ray tube also includes an anode assembly including an anode configured to receive the electron beam and to emit X-rays when impacted by the electron beam. The X-ray tube further includes a gridding electrode disposed about a path of the electron beam between the electron beam source and the anode assembly. The gridding electrode, when powered at a specific level, is configured to grid the electron beam in synchronization with planned transitions during a dynamic focal spot mode.
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公开(公告)号：US09865423B2
公开(公告)日：2018-01-09
申请号：US14446699
申请日：2014-07-30
Applicant: General Electric Company
Inventor： Sergio Lemaitre , Ben David Poquette , Ryan James Lemminger , Donald Robert Allen , Judson Sloan Marte , Gregory Alan Steinlage , Richard Michael Roffers
CPC classification number: H01J35/06
Abstract: An emitter for a cathode of an X-ray tube is provided that includes a shaped emitting surface. The emitting surface is shaped in a suitable process in order to enable the emitting surface to focus electron beams emitted from the emitting surface on a focal spot on a target of less than 1.0 mm without the need for any additional focusing elements in the X-ray tube.
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Patent Agency Ranking
公开(公告)号：US09711320B2
公开(公告)日：2017-07-18
申请号：US14264075
申请日：2014-04-29
Applicant: General Electric Company
Inventor： Yun Zou , Carey Shawn Rogers , Sergio Lemaitre , Mark Alan Frontera , Xi Zhang
IPC: H01J35/06
CPC classification number: H01J35/06 , H01J35/065
Abstract: An emitter device having an emission surface includes a plurality of ligaments configured to emit electrons in response to an applied electric field resulting from an applied electrical voltage. Further, the emitter device includes a plurality of slots configured to provide physical separation between two or more adjacently disposed ligaments of the plurality of ligaments, where one or more slots of the plurality of slots define an electrical path. Moreover, the emitter device includes a low work function layer disposed on at least a portion of a ligament of the plurality of ligaments.
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公开(公告)号：US20160189908A1
公开(公告)日：2016-06-30
申请号：US14586066
申请日：2014-12-30
Applicant: General Electric Company
Inventor： Sergio Lemaitre
CPC classification number: H01J35/06 , H01J3/38 , H01J19/10 , H01J19/48 , H01J37/063 , H01J2229/4844 , H01J2229/4896 , H01J2235/06
Abstract: In the present invention, a cathode for an x-ray tube is formed with a large area flat emitter. To reduce the aberrations to a minimum the emission area in the flat emitter has a non-rectangular shape and focusing pads arranged around the emitter. In an exemplary embodiment, the flat emitter has a non-rectilinear polygonal shape for an emission area on the emitter in order to increase the emission current from the emitter at standard voltage levels without the need to run the emitters at a higher temperature, add additional emitters to the cathode and/or to coat the emitters with a low work function material.
Abstract translation: 在本发明中，用于X射线管的阴极形成有大面积的平坦发射体。 为了将像差减小到最小，扁平发射器中的发射面积具有非矩形形状和围绕发射极布置的聚焦焊盘。 在示例性实施例中，扁平发射器具有用于发射极上的发射区域的非直线多边形形状，以便在标准电压电平下增加来自发射极的发射电流，而不需要在较高温度下运行发射器，增加额外的 发射器到阴极和/或用低功函数材料涂覆发射器。
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公开(公告)号：US20150187534A1
公开(公告)日：2015-07-02
申请号：US14144187
申请日：2013-12-30
Applicant: General Electric Company
Inventor： Vance Scott Robinson , Carey Shawn Rogers , Sergio Lemaitre , Mark Alan Frontera , Sergiy Zalyubovskiy , Xi Zhang
CPC classification number: H01J29/484 , H01J1/14 , H01J1/15 , H01J3/26 , H01J29/006 , H01J29/04 , H01J29/485 , H01J35/06 , H01L23/3178 , H01L23/367 , H01L23/373 , H01L23/3736 , H01L23/3738 , H01L33/44 , H01L33/641 , H01L33/642 , H01L2924/0002 , Y10T428/24612 , Y10T428/24802 , Y10T428/24826 , Y10T428/24942 , Y10T428/2495 , H01L2924/00
Abstract: Embodiments of the disclosure relate to electron emitters for use in conjunction with X-ray emitting devices. In certain embodiments the emitter includes features that prevent, limit, or control deflection of the electron emitter at operating temperatures. In this manner, the electron emitter may be kept substantially flat or at a desired curvature during operation.
Abstract translation: 本公开的实施例涉及与X射线发射装置结合使用的电子发射器。 在某些实施例中，发射器包括防止，限制或控制电子发射器在工作温度下的偏转的特征。 以这种方式，电子发射器可以在操作期间保持基本上平坦或处于期望的曲率。
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公开(公告)号：US20140126704A1
公开(公告)日：2014-05-08
申请号：US13672100
申请日：2012-11-08
Applicant: GENERAL ELECTRIC COMPANY
Inventor： Yun Zou , Carey Shawn Rogers , John Scott Price , Sergio Lemaitre , Mark Alan Frontera , Peter Andras Zavodsky
IPC: H05G1/02
CPC classification number: H01J35/025 , H01J35/14 , H01J2235/168
Abstract: An X-ray tube assembly includes an electron beam transport tube, a beam tube protection assembly, and a control module. The electron beam transport tube includes an opening configured for passage of an electron beam, and includes an inner surface bounding the opening along a length of the electron beam transport tube. The beam tube protection assembly includes a plurality of beam protection electrode segments disposed within the opening of the electron beam transport tube and configured to protect the inner surface of the electron beam transport tube from contact with the electron beam. The control module is configured to determine a direction of the electron beam responsive to information received from the beam tube protection assembly.
Abstract translation: X射线管组件包括电子束输送管，束管保护组件和控制模块。 电子束传送管包括被构造用于电子束通过的开口，并且包括沿电子束传送管的长度限定开口的内表面。 光束管保护组件包括多个光束保护电极段，其设置在电子束传输管的开口内并被配置为保护电子束传输管的内表面免受与电子束的接触。 控制模块被配置为响应于从束管保护组件接收的信息来确定电子束的方向。
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公开(公告)号：US10121629B2
公开(公告)日：2018-11-06
申请号：US15820955
申请日：2017-11-22
Applicant: GENERAL ELECTRIC COMPANY
Inventor： Sergio Lemaitre
Abstract: In the present invention, a computed tomography system, an X-ray tube used therein and a cathode assembly disposed in the X-ray tube, as well as an associated method of use, is provided that includes a gantry and the X-ray tube coupled to the gantry. The X-ray tube includes the cathode assembly having a pair of emission surfaces for generating an electron beam, where the pair of emission surfaces are disposed in the cathode assembly at angles with respect to one another. The X-ray tube further includes a focusing electrode for focusing the electron beam, an extraction electrode which electrostatically controls the intensity of the electron beam by adjustment of a positive or negative biasing voltage applied to the extraction electrode, a target for generating X-rays when impinged upon by the electron beam and a magnetic focusing assembly located between the cathode assembly and the target for focusing the electron beam towards the target.
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