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1.发明授权公开(公告)号：US11963284B2
公开(公告)日：2024-04-16
申请号：US17610831
申请日：2020-05-06
发明人： Heiner Daerr , Bernd Rudi David
IPC分类号： H05G1/58 , H01J35/14 , H05G1/52 , A61B6/00 , G01N23/046
CPC分类号： H05G1/58 , H01J35/147 , H05G1/52 , A61B6/482 , G01N23/046
摘要： An imaging system (202) includes an X-ray radiation source (210) configured to emit radiation that traverses an examination region. The imaging system further includes a controller (220). The controller is configured to control an X-ray tube peak voltage of the X-ray radiation source to switch between at least two different X-ray tube peak voltages during a kVp switched spectral scan. The controller is further configured to control a grid voltage of the X-ray radiation source to follow the X-ray tube peak voltage during the spectral scan. The controller adjusts the grid voltage based on a predetermined mapping between a currently applied X-ray tube peak voltage and a corresponding grid voltage for a given focal spot size, thereby maintaining the given focal spot size throughout the spectral scan.
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公开(公告)号：US11901152B2
公开(公告)日：2024-02-13
申请号：US17874678
申请日：2022-07-27
发明人： Peter Geithner , Jörg Freudenberger , Christoph Jud , Anja Fritzler , Josef Deuringer , Peter Hackenschmied
CPC分类号： H01J35/065 , H01J35/24 , A61B6/022 , A61B6/4007 , H01J35/064 , H01J2235/068 , H05G1/52
摘要： Some example embodiments provide an x-ray tube for a stereoscopic imaging having an evacuated x-ray tube housing; an electron emitter apparatus in the x-ray tube housing, the electron emitter apparatus including a first field effect emitter with a first emitter surface and a second field effect emitter with a second emitter surface, at least one of the first emitter surface or the second emitter surface being segmented such that a portion of the at least one of the first emitter surface or the second emitter surface can be set relative to the respective overall emitter surface by selectively switching emitter segments of the at least one of the first emitter surface or the second emitter surface; an anode unit in the x-ray tube housing, the anode unit configured to generate x-ray radiation for the stereoscopic imaging as a function of electrons striking two focal points; and a control unit.
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公开(公告)号：US11892576B2
公开(公告)日：2024-02-06
申请号：US18155314
申请日：2023-01-17
申请人： Excillum AB
发明人： Per Takman , Tomi Tuohimaa , Ulf Lundström
CPC分类号： G01T1/34 , H01J35/153 , H05G1/52 , H01J2235/082
摘要： A method for characterizing an electron beam in a liquid metal jet X-ray source. The method includes providing the electron beam and directing the electron beam to an interaction region; providing an electron beam dump connected to ground potential for receiving the electron beam after it has traversed the interaction region; scanning the electron beam over at least part of the interaction region; measuring X-ray radiation generated by interaction between the electron beam and the electron beam dump during the scanning to obtain an X-ray profile; and calculating an electron beam characteristic based on the X-ray profile. Also, a corresponding liquid metal jet X-ray source.
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公开(公告)号：US11715617B2
公开(公告)日：2023-08-01
申请号：US17407748
申请日：2021-08-20
发明人： William Graves , Mark Holl
CPC分类号： H01J35/153 , H05G1/02 , H05G1/28 , H05G1/52 , H01J2235/08 , H04N5/32
摘要： Some embodiments of the present disclosure provide a method that includes colliding a laser with an electron beam to produce backscattered x-rays while the electron beam is traversing a circular arc. This backscattering process is inverse Compton scattering (ICS). ICS x-rays are emitted in the same direction as the electrons. Because this ICS direction is changing as a function of time, the position of the x-ray beam on a detector will change depending on the timing of electron/laser collision. This position change is easily detected and converted to a timing measurement sensitive at the femtosecond scale, converting a very difficult timing measurement of laser pulse, electron pulse, and x-ray pulse synchronization into a simple and robust position measurement.
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公开(公告)号：US11683879B2
公开(公告)日：2023-06-20
申请号：US17316838
申请日：2021-05-11
申请人： Moxtek, Inc.
发明人： Rick Steck , Scott Hardy , Vincent F. Jones
摘要： A raster scanning x-ray source can be light and small, and can have high resolution. A raster-assembly can be attached directly to and can encircle an x-ray tube. The raster-assembly can adjoin or can be very close to the x-ray tube, resulting in a small and lightweight scanning x-ray source. X-rays can backscatter back into the x-ray tube instead of into a detector, thus improving resolution of the resulting image. A voltage-multiplier, which can be used with the x-ray source, can include separate voltage-multiplier-stages in a stack.
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公开(公告)号：US11457521B2
公开(公告)日：2022-09-27
申请号：US17330600
申请日：2021-05-26
发明人： Anja Fritzler
摘要： A method is for spatially influencing a focal spot of an X-ray source that generates X-ray radiation, to an associated X-ray source, to an associated system and to an associated computer program product. The method according to at least one embodiment includes: producing a focal spot on an anode by way of an electron emitter including a plurality of emitter segments, individually controllable to emit electrons; determining at least one actual value of a spatial extent and/or of a position of the produced focal spot; comparing the at least one actual value with a specified reference value of the focal spot; and controlling the emitter segments based upon the comparison of the at least one actual value and the reference value such that the at least one actual value converges toward the reference value, thereby spatially influencing the focal spot of the X-ray source that generates X-ray radiation.
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公开(公告)号：US11450502B2
公开(公告)日：2022-09-20
申请号：US17139122
申请日：2020-12-31
申请人： Shimadzu Corporation
发明人： Bunta Matsuhana , Goro Kambe
摘要： An X-ray imaging apparatus and a consumption level estimation method for an X-ray source, which estimate the consumption level of an X-ray source without measuring grid voltage. An X-ray control part includes: a tube current value setting part setting a tube current value supplied to an X-ray source; a tube current value measurement part measuring a cathode current value as the tube current value by a cathode current detector; a time measurement part measuring the time when the tube current value is set by the tube current value setting part and the time when the tube current value measured by the tube current value measurement part reaches the set value; and a consumption level estimation part estimating the consumption level of a cathode in the X-ray source based one the time until the tube current value reaches the set value after the tube current value has been set.
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公开(公告)号：US11443913B2
公开(公告)日：2022-09-13
申请号：US17330978
申请日：2021-05-26
发明人： Anja Fritzler
摘要： An X-ray radiator and an X-ray assembly are disclosed. The X-ray radiator according to an embodiment has an evacuated X-ray tube housing, mounted to be rotatable about a rotation axis, the X-ray tube housing including an anode and an electron source. The anode is arranged within the X-ray tube housing non-rotatably relative to the X-ray tube housing and is configured to generate X-ray radiation via electrons impacting upon a focal spot of the anode, the electron source being mounted substantially stationary within the X-ray tube housing relative to the rotation axis. The electron source has a main emitter and at least one subsidiary emitter for emitting electrons. The electron emission of the main emitter and/or of the at least one subsidiary emitter is controllable such that a spatial movement of the focal spot due to a movement of the electron source is reduced.
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公开(公告)号：US11257651B2
公开(公告)日：2022-02-22
申请号：US16973497
申请日：2019-06-24
申请人： Excillum AB
发明人： Per Takman , Ulf Lundström , Björn Hansson
摘要： A method in an X-ray source configured to emit, from an interaction region, X-ray radiation generated by an interaction between an electron beam and a target, the method including the steps of: providing the target; providing the electron beam; deflecting the electron beam along a first direction relative the target; detecting electrons indicative of the interaction between the electron beam and the target; determining a first extension of the electron beam on the target, along the first direction, based on the detected electrons and the deflection of the electron beam; detecting X-ray radiation generated by the interaction between the electron beam and the target; and determining a second extension of the electron beam on the target, along a second direction, based on the detected X-ray radiation.
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公开(公告)号：US11201030B2
公开(公告)日：2021-12-14
申请号：US16627515
申请日：2018-05-29
发明人： Chengjun Tan , Wenhui Huang , Chuanxiang Tang , Qingxiu Jin , Dongsheng Zhang , Qun Luo , Donghai Liu , Luming Zhang , Peidong Wu
摘要： A distributed X-ray light source comprises: a plurality of arranged cathode assemblies used for emitting electron beams; an anode target used for receiving the electron beams emitted by the cathode assemblies; and compensation electrodes and focusing electrodes provided in sequence between the plurality of the cathode assemblies and the anode target, the compensation electrode being used for adjusting electric field strength at two ends of a grid structure in each cathode assembly, and the focusing electrode being used for focusing the electron beams emitted by the cathode assemblies, wherein the focusing electrode corresponding to at least one cathode assembly in the plurality of the cathode assemblies comprises a first electrode and a second electrode which are separately provided, and an electron beam channel is formed between the first electrode and the second electrode.
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