Antiscatter Grid Patents (Class 378/154)
  • Patent number: 10861155
    Abstract: A method for training a function of an X-ray system that has a positioning mechanism such as a C-arm, a detector, and, in a beam path in front of the detector, an anti-scatter grid. Positioning of the detector at a large number of different positions occurs. The positioning mechanism is deflected and/or distorted. Recording of at least one X-ray photograph in each of the positions then takes place, and the method further includes machine learning of artifacts generated by the anti-scatter grid from all X-ray photographs for the function.
    Type: Grant
    Filed: February 8, 2020
    Date of Patent: December 8, 2020
    Assignee: Siemens Healthcare GmbH
    Inventors: Philipp Bernhardt, Boris Stowasser
  • Patent number: 10705247
    Abstract: A borehole fracture evaluation tool for imaging radiation emitted by radioactive materials injected into the formation during hydraulic fracturing operations, the tool including at least one collimated imaging detector used to record x-ray backscatter images; sonde-dependent electronics; and a plurality of tool logic electronics and power supply units. A method for fracture evaluation imaging, the method including at least injecting radioactive tracer materials into the formation fractures; controlling the imaging direction of an imaging array detector; imaging the fracture structures; creating a composite image of the fractures versus the formation; and determining the size and position of the fractures.
    Type: Grant
    Filed: November 16, 2018
    Date of Patent: July 7, 2020
    Assignee: Visuray Intech Ltd (BVI)
    Inventors: Mauro Arrambide, Melissa Spannuth, Philip Teague
  • Patent number: 10690789
    Abstract: A radiation detection device includes: a radiation detection panel; a supporting member having a first surface and a second surface being opposite to the first surface, wherein the radiation detection panel is provided at a side of the first surface; an electronic component that is provided on the second surface of the supporting member and drives the radiation detection panel or processes an electric signal output from the radiation detection panel; and a housing that accommodates the radiation detection panel, the supporting member, and the electronic component, a bottom of the housing which faces the second surface comprises a flat portion and a slope portion that is adjacent to the flat portion and becomes closer to the second surface as becoming further away from the flat portion, and the electronic component is provided at a position as defined herein.
    Type: Grant
    Filed: November 27, 2018
    Date of Patent: June 23, 2020
    Assignee: FUJIFILM Corporation
    Inventors: Hisatsugu Horiuchi, Masateru Tateishi, Shinsuke Noguchi
  • Patent number: 10643759
    Abstract: The disclosure relates to a grating and a radiation imaging device. The grating comprises a plurality of stacked grating elements. The grating elements are stacked to form a grid. The grating element comprises a first sheet and a second sheet having two parallel planes. The second sheet is stacked at the first sheet in a length direction of the first sheet. The first sheet is almost impervious to radiation. The present disclosure stacks the sheets having different specifications together to form the grating with uniform grating slits, such that there is no limitation on the thickness of the grating and the grating can be used along with high-energy radiations.
    Type: Grant
    Filed: November 3, 2017
    Date of Patent: May 5, 2020
    Assignees: Nuctech Company Limited, Tsinghua University
    Inventors: Li Zhang, Mingzhi Hong, Qingping Huang, Le Shen
  • Patent number: 10617369
    Abstract: An anti-scatter grid, a detector with such an anti-scatter grid and a radiation imaging system including such a detector with an anti-scatter grid are provided. The anti-scatter grid includes at least one grid wall. The parameters of the grid wall may be adjusted to arrive a uniform scatter-to-primary ratio. The parameters of the grid wall comprise thickness, height, shape, or position of the grid wall, or width of interspace between two grid walls. The detector includes the anti-scatter grid, at least one photosensor, and at least one scintillator. The radiation system includes a radiation generator, a radiation detector with the anti-scatter grid, and a processor.
    Type: Grant
    Filed: October 30, 2015
    Date of Patent: April 14, 2020
    Assignee: SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD.
    Inventor: Yanfeng Du
  • Patent number: 10605747
    Abstract: A radiographic image capturing system includes: a radiation irradiating apparatus which emits radiation and provides notification of radiation emission while emitting the radiation; a radiographic image capturing apparatus which includes two-dimensional matrix radiation detecting elements and reads electric charges accumulated in the radiation detecting elements as image data; an exposure switch capable of two-step manipulations, the exposure switch transmitting an activation signal in response to a first-step manipulation and transmitting a radiation start signal in response to a second-step manipulation; a signal transceiver which receives the activation signal and transfers the received activation signal to the radiation irradiating apparatus; and a delay time calculating device which calculates, as a delay time, a difference between a time of reception of the activation signal at the signal transceiver and a time of start of the notification of radiation emission at the radiation irradiating apparatus.
    Type: Grant
    Filed: March 8, 2017
    Date of Patent: March 31, 2020
    Assignee: KONICA MINOLTA, INC.
    Inventor: Kenroku Ubukata
  • Patent number: 10571411
    Abstract: A radiographic image capturing system includes: a radiation irradiating apparatus which emits radiation and provides notification of radiation emission while emitting the radiation; a radiographic image capturing apparatus which includes two-dimensional matrix radiation detecting elements and reads electric charges accumulated in the radiation detecting elements as image data; an exposure switch capable of two-step manipulations, the exposure switch transmitting an activation signal in response to a first-step manipulation and transmitting a radiation start signal in response to a second-step manipulation; a signal transceiver which receives the activation signal and transfers the received activation signal to the radiation irradiating apparatus; and a delay time calculating device which calculates, as a delay time, a difference between a time of reception of the activation signal at the signal transceiver and a time of start of the notification of radiation emission at the radiation irradiating apparatus.
    Type: Grant
    Filed: March 8, 2017
    Date of Patent: February 25, 2020
    Assignee: KONICA MINOLTA, INC.
    Inventor: Kenroku Ubukata
  • Patent number: 10517545
    Abstract: The present invention provides an X-ray transceiving component for a CT imaging apparatus, comprising one or more bulb devices and a plurality of detector devices. The one or more bulb devices are configured to emit quadrate-tapered or fan-shaped X-ray beams. The plurality of detector devices are configure to receive the quadrate-tapered or fan-shaped X-ray beams emitted by the one or more bulb devices, each of the quadrate-tapered or fan-shaped X-ray beams comprising X-rays passing through a scanning field of view. Note that the plurality of detector devices are configured to receive X-rays passing through different areas within the scanning field of view, the one or more bulb devices are micro-focus bulb devices, and the plurality of detector devices are flat panel detectors or photoelectric coupling detectors.
    Type: Grant
    Filed: March 28, 2017
    Date of Patent: December 31, 2019
    Assignee: GENERAL ELECTRIC COMPANY
    Inventors: Xiaoyan Zhang, Xuyong Yang, Jun Guo
  • Patent number: 10275647
    Abstract: An image obtaining section obtains a radiation image that includes a periodic pattern of a grid. A frequency analyzing section performs frequency analysis on the radiation image to obtain a frequency spectrum of the radiation image. A peak determining section determines a peak within the frequency spectrum to be a target of processing. A first judging section measures the width of the peak which is the target of processing, and judges the quality of the grid based on the measured width of the peak.
    Type: Grant
    Filed: November 13, 2016
    Date of Patent: April 30, 2019
    Assignee: FUJIFILM Corporation
    Inventor: Satoshi Naito
  • Patent number: 10238352
    Abstract: A method for generating x-ray images of an examination object is described. In the method, x-rays are emitted in a direction of an x-ray detector, wherein an examination object is arranged between the x-ray detector and an x-ray source emitting the x-rays. An anti-scatter grid, which is arranged between the examination object and the x-ray detector, is moved across the detection surface of the x-ray detector. X-ray detector signals are acquired with temporal and spatial resolution, the x-ray detector signals including the intensity of the x-rays incident on the x-ray detector. The x-ray detector signals are evaluated taking into account a temporal variation of the acquired intensity of the x-ray detector signals caused by the movement of the anti-scatter grid. An x-ray imaging apparatus is also described.
    Type: Grant
    Filed: May 31, 2016
    Date of Patent: March 26, 2019
    Assignee: Siemens Healthcare GmbH
    Inventor: Jörg Freudenberger
  • Patent number: 9949702
    Abstract: An X-ray grid structure is configured to be detachably attached to an X-ray detector and includes an X-ray grid configured to selectively transmit X-rays; and holders fixed along an outer edge of the X-ray grid, wherein at least one of the holders includes an elastic material and is configured to be bendable in a direction crossing an attachment direction, which is a direction of attaching the X-ray detector to the X-ray grid.
    Type: Grant
    Filed: February 23, 2015
    Date of Patent: April 24, 2018
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jae-won Nam, Kyung-jun Noh, Seung-hwan Lee, Dae-woong Han
  • Patent number: 9842395
    Abstract: It is possible to allow image processing on a radiation image such that the same effect of scattered radiation elimination as when imaging is actually performed using a grid is obtained. When performing processing for eliminating scattered radiation included in radiation transmitted through a subject M on a radiation image imaged by irradiating the subject M with radiation, a characteristic acquisition unit 32 acquires a virtual grid characteristic as a characteristic of a virtual grid assumed to be used to eliminate scattered radiation at the time of imaging of the radiation image. A scattered radiation elimination unit 36 performs scattered radiation elimination processing of the radiation image based on the virtual grid characteristic.
    Type: Grant
    Filed: April 21, 2017
    Date of Patent: December 12, 2017
    Assignee: FUJIFILM Corporation
    Inventor: Yoshiro Imai
  • Patent number: 9474502
    Abstract: An X-ray imaging system includes an X-ray tube (6), a ceiling suspension (2) for the X-ray tube, a detector trolley (12) with an X-ray detector (10) mounted thereon, an active sensor matrix (24), an optical indication unit (20) and a control unit (26). The active sensor matrix (24) is fixedly mounted on the ceiling suspension (2), the optical indication unit (20) is fixedly mounted to the detector trolley (12) and is adapted for emitting an optical indication (22) onto the active sensor matrix (24). The control unit (26) is connected to the active sensor matrix (24) and is adapted for acquiring the position of the optical indication (22) on the active sensor matrix (24) and to create control signals for aligning the detector trolley position and the ceiling suspension position relative to each other.
    Type: Grant
    Filed: November 26, 2012
    Date of Patent: October 25, 2016
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventor: Christoph Kurze
  • Patent number: 9392987
    Abstract: A method for assisted positioning of an organ is provided. An acquisition system comprises a platform underneath which a detector is placed for the acquisition of radiographic medical images, during which a radiation source is moved over different successive positions with respect to the detector, wherein at least one medical image is acquired at each position of the radiation source. The method comprises illuminating the platform with a light source of the acquisition system to assist the positioning of the organ on the platform; and determining, with a drive unit of the acquisition system, a positioning limit on the platform based on the distance separating the platform and a compression paddle used to compress the organ and based on the position of the light source relative to the detector, wherein the positioning limit on the platform is a limit beyond which the organ must not lie.
    Type: Grant
    Filed: April 17, 2015
    Date of Patent: July 19, 2016
    Assignee: General Electric Company
    Inventors: Yana Popova, Henri Souchay
  • Patent number: 9289182
    Abstract: Disclosed is a radiographic imaging system which is provided with: a plurality of radiographing chambers equipped with a registration device; a console; and a management device for associating and managing the identification information of a portable radiographic imaging device with the identification information of the radiographing chambers. When the identification information of the portable radiographic imaging device is notified by the registration device of a radiographing chamber, the console displays an icon corresponding to the imaging device on a selection screen. When the identification information of the portable radiographic imaging device, as notified by the registration device, is associated with the identification information of another radiographing chamber, the management device discards the association and deletes the icon corresponding to the portable radiographic imaging device from the selection screen of the console, which is associated with said other radiographing chamber.
    Type: Grant
    Filed: May 2, 2014
    Date of Patent: March 22, 2016
    Assignee: KONICA MINOLTA, INC.
    Inventor: Hisashi Yonekawa
  • Patent number: 9237877
    Abstract: Provided is a thoracic diagnosis assistance system. The system includes, an imaging unit, an extracting unit, a region dividing unit, an analysis unit and a display unit. The extraction unit extracts a lung field region from the plurality of successive image frames generated by the imaging unit. The region dividing unit divides the lung field region extracted by the extraction unit into a plurality of sub-regions and correlates the sub-regions among the plurality of image frames. The analysis unit performs an analysis of the sub-regions to calculate an inspiratory feature quantity and an expiratory feature quantity and to calculate a value of a ratio of the calculated inspiratory feature quantity to expiratory feature quantity and creates a histogram of the calculated ratio value. The display unit displays the histogram.
    Type: Grant
    Filed: December 1, 2014
    Date of Patent: January 19, 2016
    Assignee: KONICA MINOLTA, INC.
    Inventors: Syou Noji, Tetsuo Shimada, Shintaro Muraoka, Sumiya Nagatsuka
  • Patent number: 9213005
    Abstract: An X-ray anti-scatter grid having thinner X-ray opaque layers, smaller X-ray opaque diameters, greater aspect ratio, lower weight and improved image resolution is disclosed. A method of forming the X-ray anti-scatter grid is disclosed that includes a set of hollow X-ray transparent glass capillary tubes that are fused together, with an X-ray opaque layer thick enough to block X-rays at a specified energy inside the capillary tubes. The capillary tubes provide the high aspect ratio and light weight, while the X-ray opaque layer is provided by a deposition process that has features similar to atomic layer deposition (ALD). The high aspect ratio and thin layers improves resolution and decreases image artifacts, and large area X-ray anti-scatter grids are provided by aligning the axis of the an X-ray opaque layers to the X-ray source.
    Type: Grant
    Filed: November 4, 2013
    Date of Patent: December 15, 2015
    Assignee: INCOM, INC.
    Inventors: Michael J. Minot, Joseph M. Renaud, Daniel C. Bennis, Michael A. Detarando
  • Patent number: 9047999
    Abstract: A device for, and method of manufacture of, a focused anti-scatter grid for improving the image contrast of x-ray images produced in medical, veterinary or industrial applications. The grid comprising a series of modular units so juxtaposed with each other as to form a series of focused channels for the passage of the focused imaging x-rays. The modules comprise a series of focusing ribbons of a heavy metal or a series of mating solid arcuate forms, formed of a polymer and having on at least one side surface a layer of heavy metal.
    Type: Grant
    Filed: October 11, 2011
    Date of Patent: June 2, 2015
    Assignee: Turtle Bay Partners, LLC
    Inventor: Thomas J. Beck
  • Patent number: 9048002
    Abstract: A device for, and method of manufacture of, a focused anti-scatter grid for improving the image contrast of x-ray images produced in medical, veterinary or industrial applications. The grid comprising a series of modular units so juxtaposed with each other as to form a series of focused channels for the passage of the focused imaging x-rays. The modules comprise a series of focusing ribbons of a heavy metal or a series of mating solid arcuate forms, formed of a polymer and having on at least one side surface a layer of heavy metal.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: June 2, 2015
    Assignee: Turtle Bay Partners, LLC
    Inventor: Thomas J. Beck
  • Publication number: 20150124929
    Abstract: An X-ray anti-scatter grid having thinner X-ray opaque layers, smaller X-ray opaque diameters, greater aspect ratio, lower weight and improved image resolution is disclosed. A method of forming the X-ray anti-scatter grid is disclosed that includes a set of hollow X-ray transparent glass capillary tubes that are fused together, with an X-ray opaque layer thick enough to block X-rays at a specified energy inside the capillary tubes. The capillary tubes provide the high aspect ratio and light weight, while the X-ray opaque layer is provided by a deposition process that has features similar to atomic layer deposition (ALD). The high aspect ratio and thin layers improves resolution and decreases image artifacts, and large area X-ray anti-scatter grids are provided by aligning the axis of the an X-ray opaque layers to the X-ray source.
    Type: Application
    Filed: November 4, 2013
    Publication date: May 7, 2015
    Applicant: Incom, Inc.
    Inventors: Michael J. Minot, Joseph M. Renaud, Daniel C. Bennis, Michael A. Detarando
  • Patent number: 9014340
    Abstract: A radiation tomography system is provided. The radiation tomography system includes a radiation source configured to rotate around a subject and apply radiation to the subject, a plurality of radiation detecting elements disposed opposite the radiation source, a plurality of collimator plates partitioning the radiation detecting elements in a channel direction, the collimator plates erected such that plate surfaces of each of the plurality of collimator plates extend along a direction of radiation from the radiation source, and an aperture-width changing unit configured to change a width of each aperture formed by the plurality of collimator plates by moving a plurality of radiation absorbing members along respective end sides of the collimator plates close to the radiation source, the plurality of radiation absorbing members moveable between a first position at which the end sides are covered and a second position at which the end sides are exposed.
    Type: Grant
    Filed: December 20, 2012
    Date of Patent: April 21, 2015
    Assignee: GE Medical Systems Global Technology Company, LLC
    Inventor: Haruo Kurochi
  • Publication number: 20150085990
    Abstract: An x-ray imaging device includes an anti-scatter grid placed inside the housing of the imaging device and adjacent to an x-ray detector.
    Type: Application
    Filed: September 2, 2014
    Publication date: March 26, 2015
    Inventors: Gary Virshup, Heinrich Riem
  • Patent number: 8989353
    Abstract: A conductive substrate (18) and an etching substrate (20) are bonded to each other. An etch mask (25) is formed on the etching substrate (20) using a photolithography technique. On the etching substrate (20), grooves (20a) and X-ray transmitting sections (14b) are formed by dry etching using Bosch process. The grooves (20a) are filled with Au (27) by an electroplating method using the conductive substrate (18) as an electrode. Thus, X-ray absorbing sections (14a) are formed.
    Type: Grant
    Filed: March 18, 2011
    Date of Patent: March 24, 2015
    Assignee: Fujifilm Corporation
    Inventor: Yasuhisa Kaneko
  • Publication number: 20150078534
    Abstract: A scattered radiation grid of a CT detector is disclosed and includes a plurality of detector elements arranged in multiple cells in the phi direction and in the z direction of a CT system, having a plurality of free passage channels arranged to correspond to the detector elements, and walls fully enclosing the free passage channels at the longitudinal sides thereof. According to an embodiment of the invention, the walls of the scattered radiation grid are produced using a 3D screen-printing method.
    Type: Application
    Filed: April 16, 2013
    Publication date: March 19, 2015
    Applicant: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Mario Eichenseer, Andreas Freund, Stefan Wirth
  • Patent number: 8976935
    Abstract: A collimator grid and a method of fabricating the collimator grid are disclosed. The method includes molding a plurality of plates, each plate includes a plurality of grooves in a first surface, a plurality of fin tips in a second surface disposed opposite to the first surface, plurality of ribs on a first pair of peripheral sides, a plurality of first fiducials formed on the plurality of ribs, and a plurality of second fiducials formed on a second pair of peripheral sides. The method includes machining the second surface to form the plurality of fins having predefined dimensions. Further, the method includes stacking the plurality of plates overlapping each other based on the plurality of first fiducials, and machining the plurality of ribs and first fiducials to form the collimator grid.
    Type: Grant
    Filed: December 21, 2012
    Date of Patent: March 10, 2015
    Assignee: General Electric Company
    Inventors: Prabhjot Singh, Garth M Nelson, Brian David Yanoff, Juan Pablo Cilia
  • Patent number: 8964935
    Abstract: An apparatus for tomosynthesis and/or mammography includes: an X-ray detector, for receiving and detecting X-rays in a first, detection plane; an X-ray source, which can be activated individually and is positioned to emit a corresponding X-ray beam towards the first, detection plane; a processing and control unit, for activating the X-ray source and receiving a signal relating to X-rays which passed through the breast and were detected by the detector to derive a radiographic image representative of the internal structure of the breast; a grille for removing diffuse radiation, interposed between the source and the detector to receive X-rays which passed through the breast. The grille including plates positioned opposite the chest of the patient when the breast is positioned in a positioning region, and which are angled to converge towards the same region proximal to the X-ray source.
    Type: Grant
    Filed: February 21, 2012
    Date of Patent: February 24, 2015
    Assignee: I.M.S. Internazionale Medico Scientifica S.r.l.
    Inventors: Achille Albanese, Bruno Toniolo, Sara Vecchio, Paolo Vignoli, Giovanni Borasi
  • Publication number: 20140334604
    Abstract: A microstructure includes a substrate, and a grating provided in the substrate and made of metal. The grating is provided with a plurality of holes. The plurality of holes are arranged in a first direction. In a plane containing the first direction, the maximum value of the distance between the center of gravity of a grating region composed of the grating and the plurality of holes and the outer edge of the grating region is less than 1.39 times the minimum value of the distance between the center of gravity of the grating region and the outer edge of the grating region.
    Type: Application
    Filed: November 15, 2012
    Publication date: November 13, 2014
    Inventors: Takayuki Teshima, Takahisa Kato
  • Patent number: 8861685
    Abstract: A scattered-radiation collimator is disclosed for radiological radiation with a multiplicity of absorber elements that are arranged one behind the other in a collimation direction and held in a support frame. In at least one embodiment, the support frame includes a holding device for holding the absorber elements on opposite sides across the collimation direction, and at least one strip-like holding element spans the absorber elements in a collimation direction on the radiation entry side and/or the radiation exit side of the scattered-radiation collimator and additionally fixes the absorber elements on the longitudinal edges thereof in a mechanical fashion. In at least one embodiment, the holding elements prevent deformations of long absorber elements caused by centrifugal forces to a large extent. This affords the possibility of implementing scattered-radiation collimators with a large Z-coverage that meet the demand on the absorber elements in respect of dimensional stability and positional accuracy.
    Type: Grant
    Filed: November 8, 2010
    Date of Patent: October 14, 2014
    Assignee: Siemens Aktiengesellschaft
    Inventor: Claus Pohan
  • Patent number: 8861686
    Abstract: An X-ray imaging system that generates a large amount of X-rays sufficient for X-ray imaging and collimates X-rays in a direction parallel to each other at high density. The X-ray imaging system includes an X-ray generating apparatus to generate and emit X-rays, a detector to detect the X-rays emitted from the X-ray generating apparatus, and at least one collimator disposed between the X-ray generating apparatus and the detector to prevent dispersion of the X-rays emitted from the X-ray generating apparatus.
    Type: Grant
    Filed: February 6, 2012
    Date of Patent: October 14, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Ki Yeo Kim
  • Patent number: 8848876
    Abstract: According to a radiographic apparatus of this invention, parameters obtained on an assumption that an X-ray tube 2 is moved Wd×m, which is an integral multiple of pixel pitch Wd, in a B? direction opposite to B+ direction which is a direction of movement by Y-direction adjust screws of a moving mechanism, are corrected as parameters obtained when X-rays are emitted from the X-ray tube 2 in a state of a grid 6 having been moved Wd×m by the Y-direction adjust screws. This allows only the grid 6 to be moved without moving the X-ray tube 2. Therefore, parameters equivalent to the parameters which should be obtained when the X-ray tube 2 is moved are obtained by moving the grid 6, and position shifting can be reduced.
    Type: Grant
    Filed: February 10, 2009
    Date of Patent: September 30, 2014
    Assignee: Shimadzu Corporation
    Inventor: Shoji Kuwabara
  • Patent number: 8842809
    Abstract: Embodiments of the invention relate to a method for x-ray radiography and apparatus for use in x-ray radiography. Specific embodiments can utilize a grid having a plurality of apertures therethrough with optical waveguides positioned in the apertures. The optical waveguides can incorporate a scintillating material, preferably throughout, that absorbs incident x-ray radiation and emits light that is then guided by the optical waveguide. In a specific embodiment, x-ray radiation incident on a first end of the aperture is absorbed by the scintillating material in the optical waveguide and light is emitted by the same scintillating material, a portion of which is guided by the optical waveguide to a second end of the aperture. In addition, secondary electrons created by absorption of the x-ray radiation by the scintillating material can be absorbed by the scintillating material to create more light such that a magnification effect can occur. The light exiting the second end of the aperture can then be detected.
    Type: Grant
    Filed: July 7, 2009
    Date of Patent: September 23, 2014
    Assignee: University of Florida Research Foundation, Inc.
    Inventors: Sanjiv Singh Samant, Arun Gopal
  • Patent number: 8831181
    Abstract: A grid module of a scattered-radiation grid is disclosed. The scattered-radiation grid includes a number of grid modules disposed next to one another with a plurality of webs, especially for use in conjunction with a CT detector, a CT detector and a CT system with such a detector. In accordance with an embodiment of the invention, at the joining surfaces of the grid modules, the webs located there are provided with breakthroughs to compensate for a disproportionate reduction in scattered radiation.
    Type: Grant
    Filed: May 25, 2012
    Date of Patent: September 9, 2014
    Assignee: Siemens Aktiengesellschaft
    Inventors: Björn Kreisler, Thomas Reichel, Bodo Reitz, Helmut Winkelmann, Stefan Wirth, Jan Wrege
  • Patent number: 8824636
    Abstract: The present disclosure provides a bi-directional image receptor assembly capable of receiving an image receptor in either a lengthways (or longitudinal) or crossways (or transverse) orientation, while maintaining the axis of an anti-scatter grid in a fixed position. The axis of the anti-scatter grid can be placed in a fixed orientation (such as a parallel orientation) to a subject's craniocaudal axis regardless of whether the image receptor is inserted in the lengthways or crossways orientation. Methods of using the bi-directional image receptor assembly in mobile radiography are also disclosed. The present disclosure further provides for an X-ray image receptor comprising a portion of an automatic position measurement system. Still further, the present disclosure provides for a cover comprising a reinforcing geometry that maximizes the strength of the cover while minimizing the thickness of the cover.
    Type: Grant
    Filed: September 2, 2012
    Date of Patent: September 2, 2014
    Inventors: Gary T. Barnes, David M. Gauntt, Roger J. Malcolm
  • Patent number: 8761333
    Abstract: A CT system includes a rotatable gantry having an opening to receive an object to be scanned, an x-ray source configured to project an x-ray beam toward the object, and a detector array configured to detect x-rays passing through the object. The detector array includes a first array of pixels positioned to receive x-rays that pass to the detector array outside a first field-of-view (FOV) to a second FOV, the first array of pixels providing a first resolution, and a second array of pixels positioned to receive x-rays passing through the first FOV, the second array of pixels providing a second resolution that is different from the first resolution. The system includes a data acquisition system (DAS) configured to receive outputs from the detector array, and a computer programmed to acquire projections of imaging data of the object, and generate an image of the object using the imaging data.
    Type: Grant
    Filed: August 12, 2011
    Date of Patent: June 24, 2014
    Assignee: General Electric Company
    Inventors: Abdelaziz Ikhlef, David Michael Hoffman
  • Patent number: 8762146
    Abstract: A system, including a processor to define opportunities for encoding a watermark into an audio stream having sections, each section, when represented in the frequency domain, including a signal of amplitude against frequency, the processor being operative to, for each one of the sections, identify a fundamental frequency, f being the frequency with the largest amplitude of the signal in the one section, the fundamental frequency f defining harmonic frequencies, each harmonic frequency being at a frequency f/2n or 2fn, n being a positive integer, and define the one section as an opportunity for encoding at least part of the watermark if the amplitude of the signal of the one section is less than a value v for all frequencies in one or more different frequency ranges, each of the different frequency ranges being centered around different ones of the harmonic frequencies. Related apparatus and methods are also described.
    Type: Grant
    Filed: June 11, 2012
    Date of Patent: June 24, 2014
    Assignee: Cisco Technology Inc.
    Inventor: Zeev Geyzel
  • Patent number: 8748855
    Abstract: In certain exemplary embodiments of the present invention, three-dimensional micro-mechanical devices and/or micro-structures can be made using a production casting process. As part of this process, an intermediate mold can be made from or derived from a precision stack lamination and used to fabricate the devices and/or structures. Further, the micro-devices and/or micro-structures can be fabricated on planar or nonplanar surfaces through use of a series of production casting processes and intermediate molds. The use of precision stack lamination can allow the fabrication of high aspect ratio structures. Moreover, via certain molding and/or casting materials, molds having cavities with protruding undercuts also can be fabricated.
    Type: Grant
    Filed: October 9, 2013
    Date of Patent: June 10, 2014
    Assignee: Mikro Systems, Inc.
    Inventors: Michael Appleby, Iain Fraser, James E. Atkinson
  • Patent number: 8744049
    Abstract: A radiation grid comprises an absorber including absorbing foil strips extending in a direction of extension for absorbing radiation, the absorbing foil strips being arranged in a direction of arrangement perpendicular to the direction of extension; a first covering member for covering one planar surface of the absorber; a second covering member for covering a surface at the opposite side of the one surface of the absorber; first joint members each provided in an area of adjacence between the first covering member and one of the absorbing foil strips forming the absorber, for integrating the two parts; second joint members each provided in an area of adjacence between the second covering member and one of the absorbing foil strips forming the absorber, for integrating the two parts; and connecting members provided to connect ends in the direction of extension of the absorbing foil strips. The connecting members are disposed clear of a middle portion in the direction of extension of each absorbing foil strip.
    Type: Grant
    Filed: January 7, 2011
    Date of Patent: June 3, 2014
    Assignee: Shimadzu Corporation
    Inventor: Shoji Kuwabara
  • Patent number: 8737568
    Abstract: An extracting step (step S1) extracts uninfluenced pixels with a relatively high degree of certainty, while avoiding influences of random quantum noise as much as possible. An approximate fluoroscopic image is obtained based on such uninfluenced pixels (step S2). Thus, accuracy of the approximate fluoroscopic image can be improved over that of the prior art. Therefore, a grid foil shadow image (step S3) and a foil shadow standard image (step S4) calculated successively based on the approximate fluoroscopic image have improved accuracy over the prior art. As a result, while inhibiting influences of random quantum noise, a foil shadow removed image can be obtained which is free from artifacts due to distortion of a synchronous grid.
    Type: Grant
    Filed: December 13, 2011
    Date of Patent: May 27, 2014
    Assignee: Shimadzu Corporation
    Inventor: Akinori Fujita
  • Patent number: 8681944
    Abstract: A grid module of a scattered-radiation grid is disclosed. The scattered-radiation grid includes a number of grid modules disposed next to one another with a plurality of webs, especially for use in conjunction with a CT detector, a CT detector and a CT system with such a detector. In accordance with an embodiment of the invention, at the joining surfaces of the grid modules, the webs located there, compensating for an excessive reduction in scattered radiation, are embodied lower in their height than the maximum height of the other webs to be found in the grid module.
    Type: Grant
    Filed: May 25, 2012
    Date of Patent: March 25, 2014
    Assignee: Siemens Aktiengesellschaft
    Inventor: Stefan Wirth
  • Patent number: 8666025
    Abstract: An anti-scatter grid for an x-ray imaging system. The grid has substrate having a first face and a second face. The substrate has a plurality of grooves opening onto the first face of the substrate and not opening onto the second face. The substrate has high X-ray absorption properties. Each groove has an orientation such that the planes of all the grooves are convergent and intersect along a line situated on the side of the second face where the grooves do not open.
    Type: Grant
    Filed: November 19, 2010
    Date of Patent: March 4, 2014
    Assignee: General Electric Company
    Inventor: Remy Andre Klausz
  • Patent number: 8634517
    Abstract: It is described a portable X-ray system (200), which has sensing means for detecting whether an anti scatter grid (230) is attached to a portable detector (240) or not. The system is able to automatically change the default exposure settings (265 a, 265b, 265 c, 265 d), when a grid (230) is removed or attached to the portable detector (240). Thus, the risk of an under- or an over-exposure of the image will be reduced.
    Type: Grant
    Filed: August 13, 2007
    Date of Patent: January 21, 2014
    Assignee: Koninklijke Philips N.V.
    Inventor: Hanns-Ingo Maack
  • Publication number: 20130329862
    Abstract: A backscatter reduction device has a lead or lead-equivalent density sheet or foil inside a cover, such as a rigid or semirigid plastic cover. The device is placed behind an x-ray imaging plate without backscatter protective measures, thereby significantly reducing and/or eliminating backscatter radiation from backscattering objects such as the patient's bed frame. The backscatter reduction device can be combined with a radiographic grid.
    Type: Application
    Filed: June 12, 2012
    Publication date: December 12, 2013
    Applicant: University of Rochester
    Inventor: Blake SAMPSON
  • Patent number: 8598553
    Abstract: In certain exemplary embodiments of the present invention, three-dimensional micro-mechanical devices and/or micro-structures can be made using a production casting process. As part of this process, an intermediate mold can be made from or derived from a precision stack lamination and used to fabricate the devices and/or structures. Further, the micro-devices and/or micro-structures can be fabricated on planar or nonplanar surfaces through use of a series of production casting processes and intermediate molds. The use of precision stack lamination can allow the fabrication of high aspect ratio structures. Moreover, via certain molding and/or casting materials, molds having cavities with protruding undercuts also can be fabricated.
    Type: Grant
    Filed: August 31, 2011
    Date of Patent: December 3, 2013
    Assignee: Mikro Systems, Inc.
    Inventors: Michael P. Appleby, Iain Fraser, James E. Atkinson
  • Patent number: 8588366
    Abstract: An X-ray imaging apparatus for obtaining information on a phase shift of an X-ray caused by an object comprises: an splitting element for splitting spatially an X-ray emitted from an X-ray generator unit into X-ray beams; an attenuator unit having an arrangement of attenuating elements for receiving the X-ray beams split by the splitting element; and an intensity detector unit for detecting intensities of X-ray beams attenuated by the attenuator unit; and the attenuating element changing continuously the transmission amount of the X-ray depending on the X-ray incident position on the element.
    Type: Grant
    Filed: October 19, 2009
    Date of Patent: November 19, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Taihei Mukaide, Kazuhiro Takada, Kazunori Fukuda, Masatoshi Watanabe
  • Publication number: 20130272505
    Abstract: A device for, and method of manufacture of, a focused anti-scatter grid for improving the image contrast of x-ray images produced in medical, veterinary or industrial applications. The grid comprising a series of modular units so juxtaposed with each other as to form a series of focused channels for the passage of the focused imaging x-rays. The modules comprise a series of focusing ribbons of a heavy metal or a series of mating solid arcuate forms, formed of a polymer and having on at least one side surface a layer of heavy metal.
    Type: Application
    Filed: March 15, 2013
    Publication date: October 17, 2013
    Inventor: Thomas J. Beck
  • Patent number: 8532252
    Abstract: A two-dimensional X-ray shield grating which may be manufactured more easily and to a manufacturing method to provide therefor is provided. The method of manufacturing the X-ray shield grating includes: a first step of forming a plurality of columnar structures periodically arranged in two directions; and a second step of forming a film which surrounds at least side surfaces of the respective plurality of columnar structures, in which, in the second step, portions of the film formed on side surfaces of columnar structures which are adjacent to each other in the two directions among the plurality of columnar structures are connected to each other in the two directions, and in which the film is formed so that a columnar aperture is formed between columnar structures which are diagonally adjacent to each other with respect to the two directions among the plurality of columnar structures.
    Type: Grant
    Filed: December 22, 2010
    Date of Patent: September 10, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventor: Takashi Nakamura
  • Patent number: 8515013
    Abstract: A grid (1) for selective transmission of electromagnetic radiation and a method for manufacturing such grid is proposed. Therein, the grid (1) comprises a structural element with walls (3) comprising a plurality of particles (19) of a radiation-absorbing material wherein the particles (19) are sintered together such that pores (21) are present between neighboring particles (19). The pores (21) are at least partially filled with a second solid material. The filling of the pores (21) can be done by inserting the second material in a liquid, preferably molten form into the pores. The second material can be itself radiation-absorbing as well and may help to both, increase the mechanical stability of the grid and to enhance the radiation-absorbing properties.
    Type: Grant
    Filed: August 6, 2009
    Date of Patent: August 20, 2013
    Assignee: Koninklijke Philips N.V.
    Inventors: Gereon Vogtmeier, Ralf Dorscheid
  • Publication number: 20130121475
    Abstract: Anti-scatter plates are used to attenuate secondary radiation so that it is not detected by a detector array. However, anti-scatter plates often cast dynamic shadows on the detector array which results in noise in signals produced by the detector array. As disclosed herein, an anti-scatter grid comprises at least two anti-scatter plates. A percentage difference in the shadows cast by the first and the second anti-scatter plates is substantially zero (e.g., causing uniform percentage change in shadows cast on the detector array). Additionally, the shadows that are cast by the anti-scatter plates may be substantially static. In one embodiment, this is accomplished by having a top surface of an anti-scatter plate that has a transverse dimension that is less than a bottom surface of the anti-scatter plate.
    Type: Application
    Filed: July 21, 2009
    Publication date: May 16, 2013
    Inventors: Ruvin Deych, Ben Tuval
  • Patent number: 8418348
    Abstract: Problems Solved The information solves the problem of how to provide a structure and a manufacturing method that can inexpensively and stably obtain a scattered X-ray eliminating grid wherein air serves as an intermediate substance even as X-ray absorbing substance parts are accurately positioned and held.
    Type: Grant
    Filed: July 22, 2008
    Date of Patent: April 16, 2013
    Assignee: Shimadzu Corporation
    Inventor: Hiromichi Tonami
  • Patent number: 8411823
    Abstract: This invention has an object to provide an X-ray grid without obstructing travel of direct X-rays by arranging regularly absorbing foil strips having a maintained linear shape. The X-ray grid of this invention has an absorber. The absorber maintains its shape through integration with the first seat cover via the first joining member. Moreover, the X-ray grid of this invention has sufficient strength. That is because the first joining member has a thickness larger at both ends thereof in the x-direction than the center portion between the both ends.
    Type: Grant
    Filed: August 11, 2008
    Date of Patent: April 2, 2013
    Assignee: Shimadzu Corporation
    Inventor: Hiromichi Tonami