Patents Examined by Chih-Cheng Kao
  • Patent number: 11951330
    Abstract: An apparatus includes a first multileaf collimator comprising a plurality of pairs of beam-blocking leaves each comprising an end portion. The end portions of beam-blocking leaves of two adjacent pairs are configured to collectively form an aperture when the two adjacent pairs of beam-blocking leaves are closed. The aperture may be sized and shaped to allow a radiation beam to pass through for radiosurgery.
    Type: Grant
    Filed: April 21, 2022
    Date of Patent: April 9, 2024
    Assignee: VARIAN MEDICAL SYSTEMS, INC.
    Inventors: Corey Zankowski, Sasa Mutic
  • Patent number: 11955308
    Abstract: Methods and systems for realizing a high speed, rotating anode based x-ray illumination source suitable for high throughput x-ray metrology are presented herein. A high speed rotating anode includes a water cooled rotating platen supported by radial and thrust air bearings employing cascaded differential pumping. A very high bending stiffness of the rotating assembly is achieved by spacing radial air bearings far apart and locating a rotary motor and thrust bearings between the radial air bearings. The high bending stiffness increases the mechanical stability of the rotating assembly during high speed operation, and thus decreases vibration at the location of impingement of the electron beam on the rotating anode material. In some embodiments, magnetic thrust bearings are employed and the air gap is controlled to maintain a desired gap over an operational range of up to three millimeters.
    Type: Grant
    Filed: September 22, 2022
    Date of Patent: April 9, 2024
    Assignee: KLA Corporation
    Inventor: Michel Pharand
  • Patent number: 11955307
    Abstract: At least one example embodiment provides an electron emitter apparatus having a first ring of field-effect emitter needles, the field-effect emitter needles of the first ring forming a first emitter surface on an inner side of the first ring; and a second ring of field-effect emitter needles, the field-effect emitter needles of the second ring forming a second emitter surface on an inner side of the second ring, wherein the first ring and the second ring are arranged in such that the first emitter surface and the second emitter surface form a substantially contiguous three-dimensional overall emitter surface, the substantially contiguous three-dimensional overall emitter surface defining a hollow channel along a longitudinal axis of the electron emitter apparatus.
    Type: Grant
    Filed: May 2, 2022
    Date of Patent: April 9, 2024
    Assignee: Siemens Healthineers AG
    Inventors: Christoph Jud, Peter Hackenschmied, Joerg Freudenberger, Peter Geithner, Anja Fritzler
  • Patent number: 11948951
    Abstract: The invention relates to a wide spectrum multi-band detection structure with selective absorption enhancement and its preparation method. The structure comprises a plurality of sub-pixel units capable of detecting incident light in different bands. Each sub-pixel unit is composed of a square well-shaped microstructure array and a metal lower electrode (2), a photosensitive layer (3) and an upper electrode (4) on the surface thereof. The size and array spacing of square well-shaped microstructures in different sub-pixel units are determined according to the detection bands of the sub-pixel units where they are located. The upper openings of the square well-shaped microstructures are hollow to form a resonant cavity, and the adjacent square well-shaped microstructures in the same sub-pixel unit form a resonant cavity, thus solving the problem that the detector structure in the prior art cannot simultaneously realize visible light-near infrared multi-band absorption enhancement detection.
    Type: Grant
    Filed: November 23, 2019
    Date of Patent: April 2, 2024
    Assignee: Xi An Technological University
    Inventors: Huan Liu, Weiguo Liu, Yan An, Minyu Bai, Jun Han, Zhuoman Wang, Jiaxing Hu, Changlong Cai
  • Patent number: 11923165
    Abstract: A radiation tube that is used in a radiation source for radiography includes: an electron emitting unit that includes a cathode unit having an emitter electrode which emits electrons and a gate electrode; an anode unit that has an anode surface facing the cathode unit and collides with the electrons to generate radiation; a constant voltage supply unit that supplies a constant driving voltage to the gate electrode; and a vacuum tube that accommodates the constant voltage supply unit, the electron emitting unit, and the anode unit.
    Type: Grant
    Filed: February 16, 2022
    Date of Patent: March 5, 2024
    Assignee: FUJIFILM CORPORATION
    Inventor: Masayoshi Matsuura
  • Patent number: 11923166
    Abstract: In a cylindrical guard electrode (5) provided on the outer peripheral side of an electron generation part (31) of an emitter (3), a distal end section (5A) 5 positioned in the emission direction of an electron beam (L1) from the electron generation part (31) includes: a distal end inner-peripheral-side part (A1) having an inner-peripheral-side curved surface portion (a1) convex in the emission direction; a distal end outer-peripheral-side part (A2) having an outer-peripheral-side curved portion (a2) convex in the emission direction; and a 10 distal end middle part (A3) positioned between the distal end inner-peripheral-side (A1) and the distal end outer-peripheral-side part (A2). The distal end middle part (A3) has a flat surface portion (a3) between the inner-peripheral-surface portion (a1) and the outer-peripheral-side curved surface portion (a2) so as to extend in the direction therebetween.
    Type: Grant
    Filed: August 2, 2021
    Date of Patent: March 5, 2024
    Assignee: MEIDENSHA CORPORATION
    Inventors: Takumi Hayashi, Rena Takahashi, Hayato Ochi
  • Patent number: 11911207
    Abstract: Various embodiments of the present disclosure include a C-arm registration system employing a controller (70) for registering a C-arm (60) to a X-ray ring marker (20). The X-ray ring marker (20) includes a coaxial construction of a chirp ring (40) and a centric ring (50) on an annular base (30). In operation, the controller (70) acquires a baseline X-ray image illustrative of the X-ray ring marker (20) within a baseline X-ray projection by the C-arm (60) at a baseline imaging pose, derives baseline position parameters of the X-ray ring marker (20) within the baseline X-ray projection as a function of an illustration of the centric ring (50) within the baseline X-ray image, and derives a baseline twist parameter of the X-ray ring marker (20) within the baseline X-ray projection as a function of the baseline position parameters and of an illustration of the chirp ring (40) within the baseline X-ray image.
    Type: Grant
    Filed: March 25, 2020
    Date of Patent: February 27, 2024
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Alexandru Patriciu, Alyssa Torjesen, Molly Lara Flexman, Ashish Sattyavrat Panse, Marcin Arkadiusz Balicki, Ronaldus Frederik Johannes Holthuizen
  • Patent number: 11901152
    Abstract: 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.
    Type: Grant
    Filed: July 27, 2022
    Date of Patent: February 13, 2024
    Assignee: SIEMENS HEALTHCARE GMBH
    Inventors: Peter Geithner, Jörg Freudenberger, Christoph Jud, Anja Fritzler, Josef Deuringer, Peter Hackenschmied
  • Patent number: 11901153
    Abstract: An x-ray apparatus includes a vacuum chamber that includes a window for exit of x-rays. Electrons are generated at a cathode within the vacuum chamber and accelerated toward a target anode associated with the window. An x-ray generating layer is included as a surface of the target anode to receive the electrons emitted by the cathode and to create x-rays. A blocking path blocks over 70% of the free electrons reaching said target anode from continuing on to exit through the window, while allowing x-rays leaving the x-ray generating layer to continue along the selectively blocking path to exit through the window. The x-ray apparatus is capable of operating at low voltage and relatively high power to reduce the necessary shielding and the corresponding weight of the apparatus yet allow more ready absorption of x-rays by items being irradiated.
    Type: Grant
    Filed: March 5, 2021
    Date of Patent: February 13, 2024
    Assignee: PCT Ebeam and Integration, LLC
    Inventors: Karl E. Swanson, John Charles Drenter, Paul Michael Fletcher
  • Patent number: 11896846
    Abstract: A method for delivering radiation treatment may include defining a preliminary trajectory including a plurality of control points. Each control point may be associated with position parameters of a gantry and a couch. The method may also include generating a treatment plan based on the preliminary trajectory by optimizing an intensity and position parameters of a collimator and MLC leaves for each control point. The method may also include decomposing the treatment plan into a delivery trajectory including the plurality of control points. Each of the plurality of control points may be further associated with the optimized intensity, the optimized position parameters of the collimator and the MLC leaves, an output rate, and a motion parameter of each of the gantry, the couch, the collimator, and the MLC leaves. The method may further include instructing a radiation delivery device to deliver the treatment plan according to the delivery trajectory.
    Type: Grant
    Filed: December 5, 2022
    Date of Patent: February 13, 2024
    Assignee: SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD.
    Inventors: Johannes Stahl, Jonathan Maltz
  • Patent number: 11898973
    Abstract: Disclosed is an X-ray fluorescence analyzer instrument for analyzing the elemental composition of a sample, including: a measurement chamber including air and a measurement aperture sealed by a sample window; a radiation source inside the measurement chamber to invoke secondary radiation from the sample adjacent to the sample window exterior of the measurement chamber; a radiation detector having its receiver inside the measurement chamber, the radiation detector receiving the secondary radiation from the sample window and providing a measurement signal describing intensity of the received radiation; a controller analyzing composition of the sample based on an energy spectrum of the measurement signal based on a calibration established at a reference air density inside the measurement chamber; and a device adjusting a volume of the measurement chamber restoring the reference air density inside the measurement chamber after a change in air density inside the measurement chamber to maintain calibration validity
    Type: Grant
    Filed: April 25, 2022
    Date of Patent: February 13, 2024
    Assignee: HITACHI HIGH-TECH ANALYTICAL SCIENCE FINLAND OY
    Inventor: Oleg Shirokobrod
  • Patent number: 11894209
    Abstract: A component part in a vacuum area of an X-ray tube with an opening through which an electron beam is guided. The component part includes a base body made of a first material, wherein the first material is a metal. Arranged on a surface forming the opening is a second material having an atomic number which is smaller than an atomic number of the first material. A target support is attached to an end of the component part. The target support supports a target which is aligned with a lens diaphragm formed at the end of the component part. The target support has a base body made of a first material which is a metal, and a second material formed on a surface of the base body that is selectively exposed to the electron beam and which extends between the target and the lens diaphragm.
    Type: Grant
    Filed: September 14, 2018
    Date of Patent: February 6, 2024
    Assignee: COMET AG
    Inventor: André Schu
  • Patent number: 11872063
    Abstract: A method for determining a deformation measurement of a couch in a medical procedure may include determining a first deformation measurement of the couch at a reference point, the first deformation measurement corresponding to a first working position of the couch. The method may also include determining a second deformation measurement of the couch at the reference point, the second deformation measurement corresponding to a second working position of the couch. The method may further include determining a difference between the first deformation measurement and the second deformation measurement and causing an adjustment of one of the first working position and the second working position of the couch based on the difference between the first deformation measurement and the second deformation measurement.
    Type: Grant
    Filed: January 4, 2021
    Date of Patent: January 16, 2024
    Assignee: SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD.
    Inventors: Johannes Stahl, Supratik Bose, Li Wang
  • Patent number: 11877377
    Abstract: There is provided a method of setting a filament demand in an x-ray apparatus. The x-ray apparatus has a filament, through which the passing of a heating current allows thermionic emission of electrons from the filament. The x-ray apparatus has a target, arranged to generate x-rays from the electrons emitted from the filament. The x-ray apparatus has a detector, arranged to detect x-rays generated by the target for forming an x-ray image. The x-ray apparatus has a controller configured to perform a measurement operation of the x-ray apparatus. The measurement measures a parameter of the x-ray apparatus. The controller is configured to set a filament demand for the filament. The filament demand correlates with the current passed through the filament. The method comprises varying the filament demand between a first value corresponding to a lower filament current and a second value corresponding to a higher filament current.
    Type: Grant
    Filed: March 6, 2020
    Date of Patent: January 16, 2024
    Assignee: NIKON METROLOGY NV
    Inventors: Bennie Smit, Alexander Charles Wilson
  • Patent number: 11875965
    Abstract: An X-ray tube includes an electron gun unit, a target that generates X-rays, and a vacuum housing unit. The vacuum housing unit has a metal housing unit for supporting the target and a bulb unit formed of an insulating material and connected to the metal housing unit. The electron gun unit has a focusing electrode portion at an end portion on an emission side of the electrons, the focusing electrode portion having a tubular shape for focusing the emitted electrons. In the electron gun unit, at least a part of the focusing electrode portion is supported by the bulb unit so as to be located in the metal housing unit. When viewed from an X-ray generation position on the target, the focusing electrode portion blocks a line of sight from the X-ray generation position to the bulb unit.
    Type: Grant
    Filed: July 13, 2020
    Date of Patent: January 16, 2024
    Assignee: HAMAMATSU PHOTONICS K.K.
    Inventor: Atsushi Ishii
  • Patent number: 11869742
    Abstract: An X-ray beam is generated in an interaction zone of an electron beam and a target, the zone being an annular layer of a molten fusible metal in an annular channel of a rotating anode assembly. The channel has a surface profile which prevents slopping of the molten metal in the radial direction and in both directions along the rotation axis. The liquid-metal target forms a circular cylindrical surface due to the centrifugal force acting thereupon. The linear velocity of the target is preferably higher than 80 m/s; in a vacuum chamber, a changeable membrane made of carbon nanotubes is installed in the X-ray beam path and a protective screen with apertures for electron beam entry and X-ray beam exit is arranged around the interaction zone. The technical result consists in an X-ray source with increased power, brightness, lifetime and ease of use.
    Type: Grant
    Filed: April 26, 2020
    Date of Patent: January 9, 2024
    Assignees: ISTEQ B.V., ISTEQ GROUP HOLDING B.V.
    Inventors: Aleksandr Yurievich Vinokhodov, Vladimir Vitalievich Ivanov, Konstantin Nikolaevich Koshelev, Mikhail Sergeyevich Krivokorytov, Vladimir Mikhailovich Krivtsun, Aleksandr Andreevich Lash, Vyacheslav Valerievich Medvedev, Yury Viktorovich Sidelnikov, Oleg Feliksovich Yakushev, Denis Alexandrovich Glushkov, Samir Ellwi, Oleg Borisovich Khristoforov
  • Patent number: 11864300
    Abstract: The electron beam is typically dynamically steered after its generation on the path to the target. The steering is performed by one or more source coils. These coils produce the magnetic field outside the vacuum vessel allowing air/water/oil cooling to remove undesired heat. The magnetic field is then picked up inside the vacuum vessel with pole pieces and guided towards the region where the magnetic field is needed to steer the electron beam.
    Type: Grant
    Filed: April 23, 2021
    Date of Patent: January 2, 2024
    Assignee: Carl Zeiss X-ray Microscopy, Inc.
    Inventors: Claus Flachenecker, Thomas A. Case
  • Patent number: 11864301
    Abstract: A monolithic housing for an x-ray source can wrap at least partially around a power supply and an x-ray tube. The monolithic housing can include Al, Ca, Cu, Fe, Mg, Mn, Ni, Si, Sr, Zn, or combinations thereof. Mg can be a major component of the monolithic housing. The monolithic housing can be formed by injection molding. The monolithic housing can provide one or more of the following advantages: (a) light weight (for easier transport), (b) high electrical conductivity (to protect the user from electrical shock), (c) high thermal conductivity (to remove heat generated during use), (d) corrosion resistance, (e) high strength, and (f) high electromagnetic interference shielding (to shield power supply components from external noise, to shield other electronic components from power supply noise, or both).
    Type: Grant
    Filed: April 12, 2023
    Date of Patent: January 2, 2024
    Assignee: Moxtek, Inc.
    Inventors: Kasey Otho Greenland, Dan Paas
  • Patent number: 11852775
    Abstract: The present specification discloses a high speed scanning system for scanning cargo carried by rail. The system uses of a two-dimensional X-ray sensor array with, in one embodiment, a cone-beam X-ray geometry. The pulse rate of X-ray source is modulated based on the speed of the moving cargo to allow a distance travelled by the cargo between X-ray pulses to be equal to the width of the detector, for a single energy source, and to half the width of the detector for a dual energy source. This ensures precise timing between the X-ray exposure and the speed of the passing object, and thus accurate scanning of cargo even at high speeds.
    Type: Grant
    Filed: December 20, 2022
    Date of Patent: December 26, 2023
    Assignee: Rapiscan Systems, Inc.
    Inventor: Edward James Morton
  • Patent number: 11817287
    Abstract: A rotary-transmission-target microfocus X-ray source and an X-ray generation method based on the rotary-transmission-target microfocus X-ray source are provided. The X-ray source comprises a chamber, and an electron beam system is installed in the chamber. The electron beam system is arranged on a same side as an anode target rotating shaft. A motor in a rotary anode target system drives an anode target to rotate through a bevel gear transmission device. The microstructure of a target is designed. An electron beam emitted by the electron beam system vertically bombards the metal target of the rotating anode target. A cooling system is configured to cool the anode target.
    Type: Grant
    Filed: May 12, 2023
    Date of Patent: November 14, 2023
    Assignee: Beijing Institute of Technology
    Inventors: Li Xi, Kaiyuan Xue, Daining Fang