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公开(公告)号：US20190035593A1
公开(公告)日：2019-01-31
申请号：US16073290
申请日：2016-12-28
发明人： Kazuya Tsujino
摘要： 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：US20180368248A1
公开(公告)日：2018-12-20
申请号：US15832369
申请日：2017-12-05
发明人： Aleksandr Saverskiy
CPC分类号： H05H7/02 , G01V5/0041 , H01J35/00 , H01J35/14 , H05G2/00 , H05H7/08 , H05H9/04 , H05H2007/025 , H05H2007/084
摘要： Methods for generating a multiple-energy X-ray pulse. A beam of electrons is generated with an electron gun and modulated prior to injection into an accelerating structure to achieve at least a first and specified beam current amplitude over the course of respective beam current temporal profiles. A radio frequency field is applied to the accelerating structure with a specified RF field amplitude and a specified RF temporal profile. The first and second specified beam current amplitudes are injected serially, each after a specified delay, in such a manner as to achieve at least two distinct endpoint energies of electrons accelerated within the accelerating structure during a course of a single RF-pulse. The beam of electrons is accelerated by the radio frequency field within the accelerating structure to produce accelerated electrons which impinge upon a target for generating Bremsstrahlung X-rays.
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公开(公告)号：US20180358198A1
公开(公告)日：2018-12-13
申请号：US15721778
申请日：2017-09-30
发明人： Yanfeng DU , Yingbiao LIU
摘要： The present disclosure relates to a method and system for adjusting a focal point position of an X-ray tube. The method may include: obtaining a first thermal capacity and a first position of a focal point of an X-ray tube; obtaining a second thermal capacity of the X-ray tube; determining a second position of the focal point the X-ray tube based on the second thermal capacity; determining a target grid voltage difference of a focusing cup of the X-ray tube based on the first position and the second position of the focal point; and adjusting the X-ray tube based on the target grid voltage difference.
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公开(公告)号：US20180350551A1
公开(公告)日：2018-12-06
申请号：US15781083
申请日：2015-12-03
CPC分类号： H01J35/16 , H01J35/101 , H01J35/105 , H01J35/14 , H01J2235/1086 , H01J2235/168
摘要： An X-ray assembly may include a vacuum wall, an anode, and a cathode. The vacuum wall may define a vacuum enclosure and may include an X-ray window. The anode may be located within the vacuum enclosure. The anode may include a target area. The cathode may be located within the vacuum enclosure. The cathode may generate an electron stream to travel to a focus area located at the target area of the anode. The cathode may be positioned such that the electron stream travels along an oblique path relative a virtual line positioned so as to intersect a center of the focus area and a center of the X-ray window.
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公开(公告)号：US20180261420A1
公开(公告)日：2018-09-13
申请号：US15912723
申请日：2018-03-06
CPC分类号： H01J35/305 , H01J35/10 , H01J35/14 , H01J2235/10 , H05G1/52
摘要： An X-ray emitter includes an anode rotatably mounted arranged inside a vacuum housing. It can be set into rotation by an electric drive. In the region of a focal spot, the anode can be exposed to an electron beam emitted by a cathode. According to an embodiment of the invention, a control unit is configured to activate an electromagnetic deflection unit that deflects the electron beam as a function of at least one operating parameter of the electric drive such that a movement of the focal spot, caused by electromagnetic fields of the electric drive, can be at least partly compensated for. An embodiment of the invention further relates to a method for compensating for a focal spot movement when X-ray emitters in operation.
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公开(公告)号：US10074503B2
公开(公告)日：2018-09-11
申请号：US15037971
申请日：2014-09-16
发明人： Oliver Heid
摘要： The invention relates to an electron gun for generating a flat electron beam, comprising a cathode with an emission surface which is curved about a central axis and which is designed to emit electrons. The electron gun further comprises an accelerating device for accelerating the electrons in a radial direction towards a target region on the central axis. Furthermore, the emission surface has a width in the azimuth direction and a height oriented perpendicularly to the width, said width being at least ten times greater than the height.
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公开(公告)号：US10049850B2
公开(公告)日：2018-08-14
申请号：US14841726
申请日：2015-09-01
申请人： Bruker AXS GmbH
摘要： An x-ray apparatus (1), has an electron beam source (2), a target (4), onto which the electron beam (3) is directed to form a focal spot (5; 5a, 5b) on the target (4), x-ray optics (6) for collecting x-rays emitted from the focal spot (5; 5a, 5b) to form an x-ray beam (8) and a sample position (9) at which the x-ray beam (8) is directed. The x-ray apparatus (1) further includes an electrostatic or electromagnetic electron beam deflection device (10) suitable for moving the focal spot (5; 5a, 5b) on the target (4). The extension of the focal spot (5; 5a, 5b) in any direction (x, y, z) is at least a factor of 1.5 smaller than the extension of the target (4). An x-ray apparatus is thereby provided with simplified alignment of the x-ray optics with respect to a microfocus x-ray source.
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公开(公告)号：US20180185673A1
公开(公告)日：2018-07-05
申请号：US15907076
申请日：2018-02-27
申请人： W. Davis Lee , Mark R. Amato , Scott Penfold , Stephen L. Spotts
发明人： W. Davis Lee , Mark R. Amato , Scott Penfold , Stephen L. Spotts
CPC分类号： A61N5/1077 , A61B6/00 , A61B6/03 , A61B6/032 , A61B6/4258 , A61B6/5205 , A61N5/1037 , A61N5/1039 , A61N5/1044 , A61N5/1049 , A61N5/1067 , A61N5/1069 , A61N5/107 , A61N5/1082 , A61N2005/1051 , A61N2005/1052 , A61N2005/1054 , A61N2005/1061 , A61N2005/1074 , A61N2005/1087 , A61N2005/1095 , A61N2005/1097 , G21K1/08 , G21K1/087 , G21K1/093 , G21K5/04 , H01J35/14
摘要： The invention comprises a method and apparatus for imaging and/or treating a tumor of a patient using multiple ion types, such as a cations with one, two, or more mass-to-charge ratios and/or electrons, where the multiple ion types are accelerated, at separate times, using a single accelerator, and the multiple ion types are used to treat different depths into a tumor of a patient, where the patient is optionally maintained in a single treatment position relative to a patient positioning system during treatment.
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公开(公告)号：US10008359B2
公开(公告)日：2018-06-26
申请号：US14642283
申请日：2015-03-09
CPC分类号： H01J35/14 , H01J35/06 , H01J35/26 , H01J35/305
摘要： An X-ray tube can include: a cathode including an electron emitter; an anode configured to receive the emitted electrons; a first magnetic quadrupole between the cathode and the anode and having a first quadrupole yoke with four first quadrupole pole projections extending from the first quadrupole yoke and oriented toward a central axis of the first quadrupole yoke and each of the four first quadrupole pole projections having a first quadrupole electromagnetic coil; a second magnetic quadrupole between the first magnetic quadruple and the anode and having a second quadrupole yoke with four second quadrupole pole projections extending from the second quadrupole yoke and oriented toward a central axis of the second quadrupole yoke and each of the four second quadrupole pole projections having a second quadrupole electromagnetic coil; and a magnetic dipole between the cathode and anode and having a dipole yoke with four dipole electromagnetic coils.
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公开(公告)号：US09991085B2
公开(公告)日：2018-06-05
申请号：US15696919
申请日：2017-09-06
发明人： Yuanjing Li , Yaohong Liu , Jinsheng Liu , Huaping Tang , Chuanxiang Tang , Huaibi Chen , Xinshui Yan
CPC分类号： H01J35/14 , H01J35/16 , H01J35/30 , H01J2235/16
摘要： An apparatus and method to generate distributed x-rays. A hot cathode of an electron gun is used in vacuum to generate electron beams having certain initial movement energy and speed. Periodic scanning is performed with the initial low-energy electron beams, which are thus caused to be reciprocally deflected. A current-limiting device is provided in the travel path of the electron beams along the direction of the reciprocal deflection. Through holes arranged in an array on the current-limiting device, only part of the electron beams targeting specific positions can pass to form sequential electron beam currents distributed in an array. These electron beam currents are accelerated by a high-voltage electric field to obtain high energy, bombard an anode target, and thus sequentially generate corresponding focus spots and x-rays distributed in an array at the anode target.
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