公开(公告)号：US20210082655A1

公开(公告)日：2021-03-18

申请号：US17013990

申请日：2020-09-08

Applicant: Siemens Healthcare GmbH

Inventor： Lukas HAVLA ,  Anja FRITZLER ,  Peter ROEHRER

IPC: H01J35/10 ,  H01J35/18

Abstract: An x-ray emitter includes an x-ray tube and an x-ray emitter housing. In an embodiment, the x-ray tube includes an evacuated x-ray tube housing, a cathode for emitting electrons and an anode for generating x-rays as a function of the electrons. Further, in an embodiment, the x-ray emitter housing includes the x-ray tube and outside of the x-ray tube, a gaseous cooling medium. In an embodiment, the x-ray emitter further includes a compressor for a forced convection of the gaseous cooling medium for cooling the x-ray tube, a pressure ratio between the intake side and pressure side of the compressor being greater than 1.3.

公开(公告)号：US20210074504A1

公开(公告)日：2021-03-11

申请号：US17084699

申请日：2020-10-30

Applicant: SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD.

Inventor： Dun LI ,  Mingchun ZHAI ,  Xiao FANG ,  Guangzhong BAO

IPC: H01J35/10 ,  H05G1/02

Abstract: A radiation emission device is provided. The radiation emission device may include a cathode configured to emit an electron beam and an anode configured to rotate on a shaft. The anode may be situated to receive the electron beam from the cathode. The radiation emission device may further include a rotor configured to drive the anode to rotate. The rotor may be mechanically connected to the shaft. The radiation emission device may further include a sleeve configured to support the shaft via at least one bearing. The cathode, the anode, and the rotor may be enclosed in an enclosure that is connected to the sleeve. At least a portion of the sleeve may reside outside the enclosure.

公开(公告)号：US10825637B2

公开(公告)日：2020-11-03

申请号：US16023076

申请日：2018-06-29

Applicant: SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD.

Inventor： Dun Li ,  Mingchun Zhai ,  Xiao Fang ,  Guangzhong Bao

IPC: H01J35/10 ,  H05G1/02

Abstract: A radiation emission device is provided. The radiation emission device may include a cathode configured to emit an electron beam and an anode configured to rotate on a shaft. The anode may be situated to receive the electron beam from the cathode. The radiation emission device may further include a rotor configured to drive the anode to rotate. The rotor may be mechanically connected to the shaft. The radiation emission device may further include a sleeve configured to support the shaft via at least one bearing. The cathode, the anode, and the rotor may be enclosed in an enclosure that is connected to the sleeve. At least a portion of the sleeve may reside outside the enclosure.

公开(公告)号：US10791615B2

公开(公告)日：2020-09-29

申请号：US16086440

申请日：2017-03-21

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Lester Donald Miller ,  Nirmal Soni ,  Rolf Karl Otto Behling ,  Roland Proksa ,  Dionys Van De Ven

IPC: H05G1/32 ,  H05G1/58 ,  H01J35/06 ,  H01J35/10 ,  H01J35/04 ,  G01V5/00 ,  H05G1/10

Abstract: The present invention relates to an apparatus for generating X-rays. It is described to produce (210) with a power supply (40) at least two voltages between at least one cathode (20) and an anode (30), wherein the at least two voltages comprises a first voltage and a second voltage. The at least one cathode is positioned relative to the anode. Electrons are emitted (220) from the at least one cathode. Electrons emitted from the at least one cathode are interacted (230) with the anode with energies corresponding to the at least two voltages. X-rays are generated (230) from the anode, wherein the electrons interact with the anode to generate the X-rays. First X-rays are generated when the power supply produces the first voltage and second X-rays are generated when the power supply produces the second voltage. The power supply is controlled (250), such that a ratio between the first X-rays and the second X-rays is controllable.

公开(公告)号：US20200273656A1

公开(公告)日：2020-08-27

申请号：US16281716

申请日：2019-02-21

Applicant: Varex Imaging Corporation

Inventor： Wayne R. Hansen ,  Vance S. Robinson ,  Kasey O. Greenland ,  Gangqiang Wang

IPC: H01J35/06 ,  H01J35/10 ,  H01J35/18 ,  H01J35/14

Abstract: An emitter for a closed x-ray tube includes an emitter body formed of a low work function emitter material, the emitter body having a major surface and a secondary surface. The major surface is adapted for emission of electrons from the low work function material. The emitter assembly is adapted to reduce an emission current density emitted from the secondary surface of the emitter body, as compared to the major surface.

公开(公告)号：US10757796B2

公开(公告)日：2020-08-25

申请号：US16658290

申请日：2019-10-21

Applicant: SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD.

Inventor： Xi Zhang ,  Patrick Kling ,  Yun Zou ,  Alexander Zamyatin

IPC: H01J35/00 ,  H05G1/52 ,  H01J35/30 ,  H01J35/14 ,  H04N5/32 ,  H05G1/38 ,  H01J35/10 ,  H05G1/04 ,  H05G1/70

Abstract: A system and method for generating X-rays are disclosed. The method may include emitting an electron beam from a cathode to a focal track of a rotating target. The method may further include deflecting the electron beam onto a first region of the focal track at a first time, and deflecting the electron beam onto a second region of the focal track at a second time. The first region of the focal track may be separated from the second region of the focal track. The method may further include generating X-rays in response to the electron beam deflected onto the first region of the focal track or onto the second region of the focal track.

公开(公告)号：US10701787B2

公开(公告)日：2020-06-30

申请号：US16117267

申请日：2018-08-30

Applicant: Nuctech Company Limited ,  Tsinghua University

Inventor： Yaohong Liu ,  Ziran Zhao ,  Jinsheng Liu ,  Huaibi Chen ,  Liang Zhang ,  Dongsheng Zhang

IPC: H01J35/10 ,  H05G1/02 ,  H01J35/12

Abstract: The disclosed technology relates to an X-ray conversion target. In one aspect, the X-ray conversion target includes target body and a target part arranged within the target body, the target part having a first face configured to produce X-rays. The X-ray conversion target further comprises a cooling passage having a side wall, at least a part of the side wall being consisted of a portion of the target part.

公开(公告)号：US20200187339A1

公开(公告)日：2020-06-11

申请号：US16585156

申请日：2019-09-27

Applicant: Siemens Healthcare GmbH

Inventor： Jörg Freudenberger ,  Anja Fritzler ,  Peter Geithner ,  Peter Hackenschmied ,  Thomas Weber

IPC: H05G1/02 ,  H05G1/04 ,  H01J35/10

Abstract: The present disclosure provides an x-ray device including a housing configured to provide a vacuum therein, a cathode arranged inside the housing and configured to emit electrons, an anode arranged inside the housing and configured to produce x-ray radiation when impacted by electrons emitted by the cathode, and a converter configured to convert the x-ray radiation produced by the anode into monochromatic x-ray radiation, wherein the anode is configured to produce x-ray radiation in transmission and is arranged between the cathode and the converter. The present disclosure may be used in medical imaging, therapy, spectroscopy, and the like. Geometries and configurations may be improved compared to previously known x-ray devices when it comes to requirements for space, materials used, complexity of electrical wiring, distance between cathode and anode, and providing supplementary functions.

公开(公告)号：US10573484B2

公开(公告)日：2020-02-25

申请号：US15689326

申请日：2017-08-29

Applicant: General Electric Company

Inventor： Edward Emaci ,  Ian Strider Hunt ,  Alexander Ryan ,  Michael Gorrilla

IPC: H01J35/10 ,  H01J35/06 ,  F16C17/06 ,  F16C35/02 ,  F16C23/04 ,  F16C39/06

Abstract: A structure and method of operation of a journal bearing is disclosed that minimizes contact of the shaft with the sleeve during start up and slow down of rotation of the shaft relative to the sleeve, or vice versa. The bearing assembly includes a gravitational load reduction mechanism with magnets disposed on the sleeve and on the shaft in alignment with one another. The magnet(s) on the shaft interacts with the magnet(s) disposed on the sleeve to provide a force against the pressure of the shaft towards the sleeve generated by gravity on the rotating component. The magnets enable centering of the rotating component within the stationary component during low rotation and non-rotation. This prevents rubbing of the rotating journal bearing component surfaces, e.g., sleeve, against the stationary journal bearing component, e.g., shaft, during assembly, ramp-up, and coast-down when the journal bearing fluid provides minimal or no bearing centering capability.

公开(公告)号：US10546713B2

公开(公告)日：2020-01-28

申请号：US15679330

申请日：2017-08-17

Applicant: SIEMENS HEALTHCARE GMBH

Inventor： Anja Fritzler

IPC: H01J35/10 ,  A61B6/00 ,  H05G1/10 ,  H01J35/06 ,  H01J35/14

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.