公开(公告)号：US12070347B2

公开(公告)日：2024-08-27

申请号：US18228236

申请日：2023-07-31

申请人： Varian Medical Systems, Inc.

发明人： Arundhuti Ganguly ,  Gary F. Mrshup ,  Michelle Richmond ,  Billy Dan Jones

IPC分类号： A61B6/00 ,  G21K1/10 ,  H05G1/58 ,  H05G1/60 ,  A61B6/04 ,  A61B6/50 ,  G01N23/00 ,  G01N23/04 ,  H01J35/04

CPC分类号： A61B6/484 ,  A61B6/482 ,  G21K1/10 ,  H05G1/58 ,  H05G1/60 ,  A61B6/04 ,  A61B6/50 ,  A61B6/54 ,  G01N23/00 ,  G01N23/04 ,  H01J35/045

摘要： A system can have an x-ray source that generates a series of individual x-ray pulses for multi-energy imaging. A first x-ray pulse can have a first energy level and a subsequent second x-ray pulse in the series can have a second energy level different from the first energy level. An x-ray imager can receive the x-rays from the x-ray source and can detect the received x-rays for image generation. A generator interface box (GIB) controls the x-ray source to provide the series of individual x-ray pulses and synchronizes detection by the x-ray imager with generation of the individual x-ray pulses. The GIB can control x-ray pulse generation and synchronization to optimize image generation while minimizing unnecessary x-ray irradiation.

公开(公告)号：US20240038477A1

公开(公告)日：2024-02-01

申请号：US18360101

申请日：2023-07-27

申请人： Siemens Healthcare GmbH

发明人： Josef DEURINGER

IPC分类号： H01J35/04 ,  H01J35/06 ,  H01J35/10 ,  H01J35/02

CPC分类号： H01J35/045 ,  H01J35/064 ,  H01J35/101 ,  H01J35/025

摘要： One or more example embodiments relates to an X-ray source comprising a grid voltage unit including an interface configured to receive a control signal. The grid voltage unit is configured to regulate, via regulation of a first grid voltage at a first grid and via regulation of a second grid voltage at a second grid, a charge quantity available in a capacitor and a generator current as a function of the control signal.

公开(公告)号：US20230375484A1

公开(公告)日：2023-11-23

申请号：US18030948

申请日：2021-10-08

申请人： The University of North Carolina at Chapel Hill

发明人： Christina Inscoe ,  Yueh Zenas Lee ,  Boyuan LI

IPC分类号： G01N23/046 ,  H01J35/06 ,  H01J35/14 ,  G06T11/00 ,  H01J35/04

CPC分类号： G01N23/046 ,  H01J35/065 ,  H01J35/147 ,  H01J35/153 ,  G06T11/005 ,  H01J35/045 ,  G01N2223/419 ,  G01N2223/6126 ,  G01N2223/6123 ,  G01N2223/424 ,  G01N2223/3301 ,  G01N2223/401 ,  G01N2223/313 ,  G01N2223/055 ,  G01N2223/421 ,  G01N2223/206 ,  H01J2201/30469 ,  G06T2211/408

摘要： A multisource volumetric spectral computed tomography imaging device includes an x-ray source array with multiple spatially distributed x-ray focal spots, an x-ray beam collimator with an array of apertures, each confining the radiation from a corresponding x-ray focal spot to illuminate a corresponding segment of an object, a digital area x-ray detector, and a gantry to rotate the x-ray source array and the detector around the object. An electronic control unit activates the radiations from the x-ray focal spots to scan the object multiple times as the gantry rotates around the object. The images are used to reconstruct a volumetric CT image of the object with reduced scattered radiation. For dual energy and multi energy imaging, radiation from each focal spot is filtered by a corresponding spectral filter to optimize its energy spectrum.

公开(公告)号：US20220406555A1

公开(公告)日：2022-12-22

申请号：US17776407

申请日：2020-11-06

申请人： KONINKLIJKE PHILIPS N.V.

发明人： ROLF KARL OTTO BEHLING ,  ROLAND PROKSA ,  BERNHARD GLEICH ,  BERND RUDI DAVID ,  CLAAS BONTUS ,  TOBIAS REUSCH ,  AXEL THRAN

IPC分类号： H01J35/04 ,  H01J35/10 ,  H01J35/06 ,  H05G1/08 ,  H05G1/70

摘要： The present invention relates to a rotary anode X-ray source. In addition to a primary cathode of a rotary anode X-ray tube, an auxiliary cathode is provided in the rotary anode X-ray tube. Electrons from the auxiliary cathode are focused into an area on the anode, from which X-rays cannot enter the used X-ray beam generated by the primary cathode. An emission current controlling device is used to control the electron emission of the auxiliary cathode. Thus, the voltage down-ramp for dual energy scanning is kept constant even though the primary X-ray output changes for the sake of dose modulation or during a transient of the primary electron current.

公开(公告)号：US11380510B2

公开(公告)日：2022-07-05

申请号：US15596303

申请日：2017-05-16

申请人： Nanox Imaging PLC

发明人： Koichi Iida ,  Jun Yamasaki

IPC分类号： H05G1/52 ,  H01J35/14 ,  H05G1/32 ,  H01J35/04 ,  H05G1/46 ,  H01J35/30

摘要： The X-ray tube disclosed herein includes an electron emission part including an electron emission element using a cold cathode; an anode part having an anode surface with which an electron emitted from the electron emission part collides; and a focusing structure disposed between the electron emission part and a target part disposed on the anode surface. The focusing structure has a plurality of focal point areas that are applied with a voltage in a mutually independent manner. The electron emission part has first and second electron beam emission areas that are on/off controlled in a mutually independent manner. The X-ray tube is designed in such a way that a collision area of the electron beam emitted from each of the first and second electron beam emission areas on the anode surface moves in response to a voltage applied to the focusing structure.

公开(公告)号：US20220115157A1

公开(公告)日：2022-04-14

申请号：US17532507

申请日：2021-11-22

申请人： Schlumberger Technology Corporation

发明人： Luke T. Perkins ,  Christian Stoller ,  Peter Wraight

IPC分类号： G21G4/02 ,  H05H3/06 ,  H01J35/14 ,  H05G1/10 ,  H01J35/04 ,  H01J35/00 ,  H05G1/02 ,  H05G1/00 ,  G01V5/10

摘要： Disclosed is a radiation logging tool, comprising a tool housing; a compact generator that produces radiation; a power supply coupled to the compact generator; and control circuitry. Embodiments of the compact generator comprise a generator vacuum tube comprising a source generating charged particles, and a target onto which the charged particles are directed; and a high voltage supply comprising a high voltage multiplier ladder located laterally adjacent to the generator vacuum tube. The high voltage supply applies a high voltage between the source and the target to accelerate the charged particles to a predetermined energy level. The compact generator also includes an electrical coupling between an output of the high voltage supply and the target of the generator vacuum tube to accommodate the collocated positions of the generator vacuum tube and the high voltage power supply.

公开(公告)号：US10923307B1

公开(公告)日：2021-02-16

申请号：US16846406

申请日：2020-04-13

申请人： HAMAMATSU PHOTONICS K.K.

发明人： Ryosuke Yabushita ,  Atsushi Ishii

IPC分类号： H01J35/04 ,  H01J35/14

摘要： An electron beam generator includes a cathode having a distal end portion emitting an electron beam, a first electrode accommodating the distal end portion, and a second electrode surrounding the first electrode when viewed from a direction along an emission axis of the electron beam. The first electrode has a first side wall surrounding the distal end portion. The second electrode has a second side wall separated from the first side wall and surrounding the first side wall. The first side wall is provided with a first opening portion allowing a first space surrounded by the first side wall and a second space between the first side wall and the second side wall to communicate with each other. The second electrode is provided with a second opening portion opening in the direction along the emission axis such that the second space and an external space communicate with each other.

公开(公告)号：US10431415B2

公开(公告)日：2019-10-01

申请号：US15820899

申请日：2017-11-22

申请人： GENERAL ELECTRIC COMPANY

发明人： Sergio Lemaitre

IPC分类号： H01J35/14 ,  H01J35/08 ,  H01J35/06 ,  H01J35/04 ,  H01J35/16

摘要： In the present invention, a cathode is formed with one or more emitters energized to emit electrons that are accelerated towards an anode or target spaced from the cathode. Between the cathode and the target is disposed an ion barrier electrode defining an aperture therein disposed in alignment with the emitters to enable the electron beam to pass through the electrode. The barrier electrode is operably connected to a voltage supply to positively bias the barrier electrode, and the barrier electrode is shaped to minimize the required supply voltage. This positive voltage bias creates a positive potential barrier across the electrode sufficient to repel positive ions generated by the electron beam, protecting the cathode from contact with the ions and increasing the stability of the focal spot generated by the tube by maintaining the ions within the drift region between the ion barrier and the target.

公开(公告)号：US10381189B2

公开(公告)日：2019-08-13

申请号：US15414455

申请日：2017-01-24

申请人： ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

发明人： Jin-Woo Jeong ,  Yoon-Ho Song

IPC分类号： H01J35/14 ,  H01J35/04 ,  G21K1/02

摘要： The present disclosure relates to an X-ray tube, and more particularly, to an X-ray tube having a simple structure from which an element necessary for focusing an electron beam, such as a magnetic lens, and having generating an X-ray having a focal spot of a nanometer-scale. The present disclosure includes: a electron beam generation unit emitting an electron beam; a limiting electrode unit limiting the electron beam emitted from the electron beam generation unit; and a target unit including a target material emitting an X-ray when the limited electron beam collides with the target material, wherein the limiting electrode includes of an electron beam limiting electrode allowing a portion of the emitted electron beam to pass therethrough and to be delivered to the target unit.

公开(公告)号：US20190116654A1

公开(公告)日：2019-04-18

申请号：US16086440

申请日：2017-03-21

申请人： KONINKLIJKE PHILIPS N.V.

发明人： LESTER DONALD MILLER ,  NIRMAL SONI ,  ROLF KARL OTTO BEHLING ,  ROLAND PROKSA ,  DIONYS VAN DE VEN

IPC分类号： H05G1/32 ,  H05G1/58 ,  H01J35/04 ,  H01J35/06 ,  H01J35/10

摘要： 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.