公开(公告)号：US20180330910A1

公开(公告)日：2018-11-15

申请号：US15527435

申请日：2015-10-19

Applicant: Hitachi, Ltd.

Inventor： Yoshitaka SEKI

IPC: H01J35/10 ,  H01J35/16

CPC classification number: H01J35/103 ,  H01J35/101 ,  H01J35/16 ,  H01J2235/08 ,  H01J2235/1066 ,  H01J2235/108 ,  H01J2235/12 ,  H01J2235/16

Abstract: There is provided an X-ray tube device having a configuration for preventing peeled-off solid lubrication films from scattering in an X-ray tube even when the solid lubrication film peels off a rotary bearing. The X-ray tube device includes: an anode (212) that is irradiated with an electron beam, thereby emitting X-rays; a rotary bearing (304) that rotatably supports the anode (212); a solid lubrication film which is formed on a front surface of the rotary bearing (304) and into which a ferromagnet is mixed from the rotary bearing (304); and an attractor (303) which attracts, with a magnetic force, the solid lubrication film that peels off the rotary bearing (304).

公开(公告)号：US20180277330A1

公开(公告)日：2018-09-27

申请号：US15466362

申请日：2017-03-22

Applicant: General Electric Company

Inventor： Shivaprasad Nagesh ,  Ganesh Chandan Gangadharan

IPC: H01J35/10 ,  G01P3/04 ,  G01M13/04 ,  H01J35/16

Abstract: A contactless and/or non-invasive system and method of determining the rotational state and/or speed of a rotor is provided for an X-ray tube including a liquid metal bearing. The system includes a vibration sensor that is affixed to the exterior of the x-ray tube and is utilized to detect the vibrations generated by the spinning of the rotor and liquid metal bearing assembly within the x-ray tube. The x-ray tube has signature vibration signal based on the construction and rotor speed of the x-ray tube. The system and method of the invention used to detect the rotor state/speed includes a sensor to pick up the vibration from the x-ray tube and perform signal processing, and a software algorithm stored within the device or on an operably connected device or system that can analyze the vibration data from the sensor to indicate whether the anode in the x-ray tube is spinning.

公开(公告)号：US20180247786A1

公开(公告)日：2018-08-30

申请号：US15442132

申请日：2017-02-24

Applicant: General Electric Company

Inventor： Yong Liang ,  Vance Scott Robinson ,  Uwe Wiedmann

IPC: H01J35/10

CPC classification number: H01J35/105 ,  H01J35/12 ,  H01J2235/088 ,  H01J2235/1291

Abstract: In one embodiment, an X-ray source includes a source target configured to generate X-rays when impacted by an electron beam. The source target includes one or more thermally conductive layers; and one or more X-ray generating layers interleaved with the thermally conductive layers, wherein at least one X-ray generating layer comprises regions of X-ray generating material separated by thermally conductive material within the respective X-ray generating layer.

公开(公告)号：US20180204703A1

公开(公告)日：2018-07-19

申请号：US15872317

申请日：2018-01-16

Applicant: Varex Imaging Corporation

Inventor： Gregory C. Andrews

IPC: H01J35/10 ,  H01J9/18

CPC classification number: H01J35/101 ,  H01J9/18 ,  H01J35/10 ,  H01J35/108 ,  H01J35/16 ,  H01J35/18

Abstract: Technology is described for steep angle of a focal track of an anode of an x-ray tube. In one example, an anode includes a disc-shaped anode and a focal track. The disc-shaped anode includes a bearing-facing surface, a window-facing surface positioned opposite the bearing-facing surface, and a focal track positioned between the window-facing surface and the bearing-facing surface, wherein the focal track is angled with respect to the window-facing surface, and the angle between the focal track and the window-facing surface is between 45° and 89°.

公开(公告)号：US10020157B2

公开(公告)日：2018-07-10

申请号：US15717364

申请日：2017-09-27

Applicant: NIKON METROLOGY NV

Inventor： Roger Hadland

IPC: H01J35/10 ,  H01J35/02 ,  H01J29/48 ,  F16C33/76 ,  H02M1/32 ,  H05G1/12 ,  H02M7/10 ,  H01J35/04 ,  F16J15/16 ,  H01J35/16 ,  F16C35/04

CPC classification number: H01J35/025 ,  F16C33/768 ,  F16C35/042 ,  F16J15/16 ,  H01J29/48 ,  H01J35/04 ,  H01J35/06 ,  H01J35/101 ,  H01J35/106 ,  H01J35/108 ,  H01J35/116 ,  H01J35/16 ,  H01J37/065 ,  H01J2235/0236 ,  H01J2235/083 ,  H01J2235/086 ,  H01J2235/1046 ,  H01J2235/1204 ,  H01J2235/1262 ,  H01J2235/20 ,  H01J2237/2482 ,  H02M1/32 ,  H02M7/106 ,  H05G1/12

Abstract: Disclosed herein are a high-voltage generator for an x-ray source, an x-ray gun, an electron beam apparatus, a rotary vacuum seal, a target assembly for an x-ray source, a rotary x-ray emission target, and an x-ray source. These various aspects may separately and/or together enable the construction of an x-ray source which can operate at energies of up to 500 kV and beyond, which is suitable for use in commercial and research x-ray applications such as computerized tomography. In particular, the high-voltage generator includes a shield electrode electrically connected intermediate of a first voltage multiplier and a second voltage multiplier. The electron beam apparatus includes control photodetectors and photo emitters having a transparent conductive shield arranged therebetween. The rotary vacuum seal includes a pumpable chamber at a position intermediate between high-pressure and low-pressure ends of a bore for a rotating shaft. The rotary target assembly is configured such that when a torque between a bearing housing and a vacuum housing exceeds a predetermined torque, the bearing housing rotates relative to the vacuum housing. The rotary x-ray emission target has a plurality of target plates supported on a hub, the plates being arranged on the hub to provide an annular target region about an axis rotation of the hub. The x-ray gun is provided with a shield electrode maintained at a potential difference relative to the x-ray target different to the electron beam emission cathode.

公开(公告)号：US20180182591A1

公开(公告)日：2018-06-28

申请号：US15902416

申请日：2018-02-22

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： CHRISTOPH HELMUT BATHE ,  ULRICH HERMANN HOVE

IPC: H01J35/10 ,  H01J9/14

CPC classification number: H01J35/101 ,  H01J9/148 ,  H01J2235/1006 ,  H01J2235/1013 ,  H01J2235/1046

Abstract: In order to provide a mount of an anode disk to a rotating shaft that is suitable for increased thermal loads on the anode disk, a rotating anode assembly (10) is provided that comprises an anode disk (12), a rotating shaft (14), and an anode disk support (16). The anode disk is concentrically mounted to a rotating axis (18) of the rotating shaft via the anode disk support, and the anode disk support comprises a first support (20) with a first circular axial support surface (22) that is provided at the rotating shaft in a concentric manner with the rotating axis. Further, the anode disk support comprises a second support (24) with a second axial support surface (26) that is at least temporarily attached to the rotating shaft for urging the anode disk against the first support surface in an axial clamping direction. Still further, the first support is provided as a radially flexible support (28). Upon heating up of the anode disk during X-ray generation, and a thermal expansion of the anode disk, the radially flexible support bends (32) radially such that the first axial support surface at least partly follows the thermal expansion in a radial direction.

公开(公告)号：US20180090293A1

公开(公告)日：2018-03-29

申请号：US15280701

申请日：2016-09-29

Applicant: General Electric Company

Inventor： Yong Liang ,  Vance Scott Robinson

IPC: H01J35/12 ,  H01J35/06 ,  H01J35/10

CPC classification number: H01J35/08 ,  H01J2235/084 ,  H01J2235/088 ,  H01J2235/1291

Abstract: The present disclosure relates to multi-layer X-ray sources having decreased hydrogen within the layer stack and/or tungsten carbide inter-layers between the primary layers of X-ray generating and thermally-conductive materials. The resulting multi-layer target structures allow increased X-ray production, which may facilitate faster scan times for inspection or examination procedures.

公开(公告)号：US20180053622A1

公开(公告)日：2018-02-22

申请号：US15679330

申请日：2017-08-17

Applicant: SIEMENS HEALTHCARE GMBH

Inventor： ANJA FRITZLER

IPC: H01J35/10 ,  H01J35/14

CPC classification number: H01J35/105 ,  A61B6/40 ,  H01J35/06 ,  H01J35/065 ,  H01J35/14 ,  H01J2235/06 ,  H05G1/10

Abstract: A thermionic emission device includes an indirectly heatable main emitter with a main emission surface and a connectible heat emitter with a heat emission surface. The heat emission surface is disposed at a predefinable distance from the main emission surface. In the operating state, the main emitter is at a constant main potential and the heat emitter can be switched between at least two heating potentials which differ from one another and which differ from the main potential. Through the use of the thermionic emission device, the radiation load for a patient is reduced in the case of dose-modulated x-ray recordings.

公开(公告)号：US09892883B2

公开(公告)日：2018-02-13

申请号：US14528408

申请日：2014-10-30

Applicant: Toshiba Electron Tubes & Devices Co., Ltd.

Inventor： Hidero Anno ,  Masaji Kanagami

IPC: H01J35/16 ,  H01J37/16 ,  H05G1/02 ,  H01J35/10 ,  H01J7/26 ,  H01J19/36 ,  H01J19/54 ,  H01J19/74 ,  A61B6/00 ,  A61B6/10 ,  H01J35/26 ,  H05G1/04

CPC classification number: H01J35/105 ,  A61B6/107 ,  A61B6/4488 ,  H01J7/26 ,  H01J19/36 ,  H01J19/54 ,  H01J19/74 ,  H01J35/16 ,  H01J35/26 ,  H01J37/165 ,  H01J2229/0061 ,  H01J2229/863 ,  H01J2229/8638 ,  H01J2235/12 ,  H01J2235/1216 ,  H01J2235/166 ,  H01J2237/002 ,  H01J2237/16 ,  H05G1/025 ,  H05G1/04

Abstract: According to one embodiment, a rotating-anode X-ray tube assembly includes a rotating-anode X-ray tube, a housing, a coolant, a first shell, an X-ray shielding member, a second shell and an air introduction unit. The first shell is provided apart from the housing and an envelope of the rotating-anode X-ray tube, and surrounds the envelope. The X-ray shielding member is provided between the first shell and the housing and apart from the housing. The second shell is provided apart from the housing to cause an airway to be formed between the second shell and the housing. The air introduction unit produces a flow of air in the airway.

公开(公告)号：US20180033581A1

公开(公告)日：2018-02-01

申请号：US15717393

申请日：2017-09-27

Applicant: NIKON METROLOGY NV

Inventor： Roger HADLAND

IPC: H01J35/02 ,  H01J29/48 ,  F16C35/04 ,  F16C33/76 ,  F16J15/16 ,  H05G1/12 ,  H02M7/10 ,  H01J35/10 ,  H01J35/04 ,  H01J35/16 ,  H02M1/32

CPC classification number: H01J35/025 ,  F16C33/768 ,  F16C35/042 ,  F16J15/16 ,  H01J29/48 ,  H01J35/04 ,  H01J35/06 ,  H01J35/101 ,  H01J35/106 ,  H01J35/108 ,  H01J35/16 ,  H01J37/065 ,  H01J2235/0236 ,  H01J2235/083 ,  H01J2235/086 ,  H01J2235/087 ,  H01J2235/1046 ,  H01J2235/1204 ,  H01J2235/1262 ,  H01J2235/20 ,  H01J2237/2482 ,  H02M1/32 ,  H02M7/106 ,  H05G1/12

Abstract: Disclosed herein are a high-voltage generator for an x-ray source, an x-ray gun, an electron beam apparatus, a rotary vacuum seal, a target assembly for an x-ray source, a rotary x-ray emission target, and an x-ray source. These various aspects may separately and/or together enable the construction of an x-ray source which can operate at energies of up to 500 kV and beyond, which is suitable for use in commercial and research x-ray applications such as computerised tomography. In particular, the high-voltage generator includes a shield electrode electrically connected intermediate of a first voltage multiplier and a second voltage multiplier. The electron beam apparatus includes control photodetectors and photo emitters having a transparent conductive shield arranged therebetween. The rotary vacuum seal includes a pumpable chamber at a position intermediate between high-pressure and low-pressure ends of a bore for a rotating shaft. The rotary target assembly is configured such that when a torque between a bearing housing and a vacuum housing exceeds a predetermined torque, the bearing housing rotates relative to the vacuum housing. The rotary x-ray emission target has a plurality of target plates supported on a hub, the plates being arranged on the hub to provide an annular target region about an axis rotation of the hub. The x-ray gun is provided with a shield electrode maintained at a potential difference relative to the x-ray target different to the electron beam emission cathode.