Shutter Or Chopper Patents (Class 378/160)
  • Patent number: 10153060
    Abstract: The present disclosure relates to a device for closing and opening a beam path of electromagnetic and/or ionizing radiation, comprising at least one part of a shutter body which is permanently situated in the beam path and rotatable about a longitudinal axis situated essentially transversely with respect to the beam path, and which contains a material that is opaque to the radiation and blocks the beam path when the shutter body is in a closed rotary position, and which defines a passage that is transparent to the radiation when in an open rotary position; and comprising a magnetic drive which is coupled to the shutter body for rotation of same about the longitudinal axis between the rotary positions. The magnetic drive is an electromagnetic drive, and is configured for moving the shutter body between the rotary positions, wherein at least one of the rotary positions corresponds to a stable position of the magnetic drive which maintains the magnetic drive without current.
    Type: Grant
    Filed: July 9, 2014
    Date of Patent: December 11, 2018
    Assignee: SMITHS HEIMANN GMBH
    Inventor: Norbert Haunschild
  • Patent number: 10092253
    Abstract: An imaging system for imaging a portion(s) of an anatomical structure can be provided. For example, an x-ray source first arrangement can provide x-ray radiation, and a multi-hole collimator second arrangement can be provided in a path of the x-ray radiation, and can be configured to undersample the radiation beam which can be forwarded to the portion(s) of the anatomical structure. A third hardware arrangement can be configured to receive a further x-ray radiation from the portion(s) that can be based on the undersampled x-ray radiation.
    Type: Grant
    Filed: September 22, 2015
    Date of Patent: October 9, 2018
    Assignees: NEW YORK UNIVERSITY, BRIGHAM AND WOMEN'S HOSPITAL
    Inventors: Daniel K. Sodickson, Aaron Sodickson, Ricardo Otazo
  • Patent number: 9910367
    Abstract: A lithographic apparatus including: a first object, a second object which is moveable relative to the first object in a moving direction, a set of cables and/or tubing arranged between the first object and the second object, a guiding drum to guide the set of cables and/or tubing, the guiding drum being rotatable about a rotation axis extending perpendicular to the moving direction, a drum positioning device to position the guiding drum such that it follows movement of the set of cables and/or tubing caused by movement of the second object relative to the first object and a guiding structure to guide movement of the guiding drum in the moving direction.
    Type: Grant
    Filed: April 15, 2015
    Date of Patent: March 6, 2018
    Assignee: ASML NETHERLANDS B.V.
    Inventor: Sander Christiaan Broers
  • Patent number: 9466097
    Abstract: The present disclosure relates to an apparatus and a method for removing fog in an image capable of providing a defogged image without a sense of difference by adaptively controlling defogging parameters in response to a density of fog to remove fog.
    Type: Grant
    Filed: December 8, 2014
    Date of Patent: October 11, 2016
    Assignee: HYUNDAI MOTOR COMPANY
    Inventors: Dong In Shin, Won Seok Lee, Ha Yong Woo, Hwa Young Kim, Jin Hyuk Choi, Dong Eon Oh
  • Patent number: 9285329
    Abstract: A method for analyzing a sample by diffractometry and a diffractometer, where the diffractometer includes a collimated source, a detection collimator, and a spectrometric detector, the detection axis of the detector and the collimator form a diffraction angle with the central axis of an incident beam and an energy spectrum is established for each pixel of the detector. The measured spectra are readjusted by a change in variable that takes into account the energy of the scattered radiation and the angle of observation. The measured are combined and a check is made on the implementation of at least one multi-material criterion representative of the presence of a plurality of layers of materials and groups of pixels are formed according to the results of this check, where each group corresponds to a single layer of material and the measured spectra obtained for the pixels of the group are combined.
    Type: Grant
    Filed: December 26, 2012
    Date of Patent: March 15, 2016
    Assignee: Commissariat A L'Energie Atomique et Aux Energies Alternatives
    Inventors: Bahaa Ghammraoui, Joachim Tabary, Caroline Paulus
  • Patent number: 9028145
    Abstract: Apparatus and methods for collimation of x-ray beams. According to various embodiments, an x-ray apparatus may comprise a first rotatable disk comprising a first plurality of angled slots and a first shutter comprising a first plurality of protruding members. At least one of the first plurality of protruding members may be positioned within a first angled slot of the first plurality of angled slots, and at least one of the first plurality of protruding members may be positioned within a second angled slot of the first plurality of angled slots. The first shutter may at least partially define an x-ray collimation aperture, and the apparatus may be configured such that rotation of the first rotatable disk results in movement of the first shutter to alter a size of the x-ray collimation aperture.
    Type: Grant
    Filed: November 21, 2012
    Date of Patent: May 12, 2015
    Assignee: Aribex, Inc.
    Inventors: David J. Laws, Devin Ellsworth
  • Patent number: 8989352
    Abstract: Apparatus and methods for providing a distance indication using an x-ray apparatus. According to various embodiments, an x-ray apparatus may be provided comprising an x-ray generator and a visible light generator. The apparatus may further comprise a projection member, such as a reticle, comprising a material at least partially transparent to visible light, wherein the projection member comprises an image positioned within the path of the visible light so as to project a secondary image comprising a shadow defined by the image. A LASER configured to deliver a LASER beam at an angle relative to the visible light may be provided such that the LASER beam intersects at least a portion of the secondary image at a predetermined distance from the LASER to allow a user to determine precisely a distance from the apparatus to an object to be exposed to x-ray radiation.
    Type: Grant
    Filed: November 21, 2012
    Date of Patent: March 24, 2015
    Assignee: Aribex, Inc.
    Inventors: David J. Laws, Devin Ellsworth
  • Publication number: 20150023469
    Abstract: An irradiation field-limiting apparatus connected to an X-ray-generating apparatus includes a pair of first limiting blades defining a width of an opening through which radiation is to pass; a first opening width-adjusting mechanism including a first opening width-adjusting shaft operable to adjust the width of the opening by moving the pair of first limiting blades toward or away from each other; and a first opening center-adjusting mechanism including a first opening center-adjusting shaft operable to adjust a center position of the opening by moving the pair of first limiting blades in a same direction. The first opening width-adjusting shaft and the first opening center-adjusting shaft are coaxially arranged.
    Type: Application
    Filed: July 14, 2014
    Publication date: January 22, 2015
    Inventors: Yasuo Ohashi, Takashi Shiozawa, Kazuyuki Ueda
  • Publication number: 20150010132
    Abstract: A microcrystal structure analysis apparatus, a microcrystal structure analysis method, and an X-ray shielding device are provided which allow a favorable X-ray diffraction image to be obtained even when X rays are applied to a pseudo-single-crystallized sample while the sample is rotated.
    Type: Application
    Filed: February 6, 2013
    Publication date: January 8, 2015
    Inventors: Tsunehisa Kimura, Fumiko Kimura, Chiaki Tsuboi
  • Patent number: 8861684
    Abstract: An apparatus for forming a beam of energetic particles and for scanning the beam of particles with respect to an inspected object. The apparatus has a source of energetic particles characterized by an effective beam origin and a rotating hoop having at least one aperture, such that the effective beam origin of the source is closer to the inspected object than the axis of rotation of the rotating hoop. A collimating structure disposed interior to the rotating hoop collimates emission by the source into a fan beam prior to impinging on the rotating hoop. In some embodiments, the effective beam origin may be moved with respect to the axis of rotation of the hoop.
    Type: Grant
    Filed: August 14, 2012
    Date of Patent: October 14, 2014
    Assignee: American Science and Engineering, Inc.
    Inventors: Omar Al-Kofahi, Peter J. Rothschild
  • Publication number: 20140153699
    Abstract: The present specification discloses a beam chopping apparatus, and more specifically, a helical shutter for an electron beam system that is employed in radiation-based scanning systems, and more specifically, a beam chopping apparatus that allows for variability in both velocity and beam spot size by modifying the physical characteristics or geometry of the beam chopper apparatus. The present specification also discloses a beam chopping apparatus which provides a vertically moving beam spot with substantially constant size and velocity to allow for substantially equal illumination of the target. In addition, the present specification is a beam chopping apparatus that is lightweight and does not cause an X-ray source assembly employing the beam chopper to become heavy and difficult to deploy.
    Type: Application
    Filed: October 7, 2013
    Publication date: June 5, 2014
    Applicant: Rapiscan Systems, Inc.
    Inventor: Joseph W. Kaminski
  • Patent number: 8693628
    Abstract: To reduce X-ray exposure while improving image quality, an area of interest is selected in the image. The image of the selected area is updated frequently, comparable to a rate of updates used today for the whole image. The rest of the image is updated at a significantly lower rate. Since the area of interest normally is a small part of the overall area, the total exposure is reduced significantly. A fast X-ray shutter, placed near the X-ray source, blocks the radiation from areas outside the area of interest. The shutter automatically retracts when the complete image is updated. The area of interest can be selected by the user or automatically selected based on activity in the image. Since most of the exposures are taken at a reduced collimation angle, limited by the area of interest, the area of interest is imaged at reduced scatter and better quality.
    Type: Grant
    Filed: December 7, 2010
    Date of Patent: April 8, 2014
    Inventors: Lindsay S. Machan, Daniel Gelbart
  • Patent number: 8576989
    Abstract: The present specification discloses a beam chopping apparatus, and more specifically, a helical shutter for an electron beam system that is employed in radiation-based scanning systems, and more specifically, a beam chopping apparatus that allows for variability in both velocity and beam spot size by modifying the physical characteristics or geometry of the beam chopper apparatus. The present specification also discloses a beam chopping apparatus which provides a vertically moving beam spot with substantially constant size and velocity to allow for substantially equal illumination of the target. In addition, the present specification is a beam chopping apparatus that is lightweight and does not cause an X-ray source assembly employing the beam chopper to become heavy and difficult to deploy.
    Type: Grant
    Filed: March 14, 2011
    Date of Patent: November 5, 2013
    Assignee: Rapiscan Systems, Inc.
    Inventor: Joseph W. Kaminski
  • Patent number: 8437451
    Abstract: A shutter arrangement for an X-ray housing includes a shutter 10 for example of solid tantalum. In embodiments, the shutter has a through hole 22 and slides between a closed and an open position on the inner face of the X-ray housing, in the open position the through hole 22 aligns with an opening 8 in the housing.
    Type: Grant
    Filed: January 12, 2011
    Date of Patent: May 7, 2013
    Assignee: PANalytical B.V.
    Inventors: Wilbert Alexander Van Lemel, Jaap Boksem
  • Publication number: 20120275566
    Abstract: A system for subsea imaging comprises a first plate having an inner surface, an outer surface, and a cavity formed in the inner surface. In addition, the system comprises a phosphor imaging plate disposed in the cavity. Further, the system comprises a second plate having an inner surface facing the inner surface of the first plate and an outer surface facing away from the outer surface of the first plate. Still further, the system comprises a seal member disposed between the inner surface of the first plate and the inner surface of the second plate. The seal member extends around the perimeter of the cavity and is configured to seal the phosphor imaging plate and the cavity from intrusion water.
    Type: Application
    Filed: April 27, 2012
    Publication date: November 1, 2012
    Applicants: LOS ALAMOS NATIONAL SECURITY, LLC, BP CORPORATION NORTH AMERICA INC.
    Inventors: James Hunter, Danny Lee Keck, James Rae Sims, JR., Scott Avery Watson
  • Publication number: 20120269319
    Abstract: Apparatus for interrupting and/or scanning a beam of penetrating radiation, such as for purposes of inspecting contents of a container. A source, such as an x-ray tube, generates a fan beam of radiation effectively emanating from a source axis, with the width of the fan beam collimated by a width collimator, such as a clamshell collimator. An angular collimator, stationary during the course of scanning, limits the extent of the scan, and a multi-aperture unit, such as a hoop, or a nested pair of hoops, is rotated about a central axis, and structured in such a manner that the total beam fluence incident on a target is conserved for different fields of view of the beam on the target. The central axis of hoop rotation need not coincide with the source axis.
    Type: Application
    Filed: April 13, 2012
    Publication date: October 25, 2012
    Applicant: AMERICAN SCIENCE AND ENGINEERING, INC.
    Inventors: Lee Grodzins, Jeffrey R. Schubert, Omar Al-Kofahi, Peter J. Rothschild
  • Publication number: 20120177180
    Abstract: A shutter arrangement for an X-ray housing includes a shutter 10 for example of solid tantalum. In embodiments, the shutter has a through hole 22 and slides between a closed and an open position on the inner face of the X-ray housing, in the open position the through hole 22 aligns with an opening 8 in the housing.
    Type: Application
    Filed: January 12, 2011
    Publication date: July 12, 2012
    Applicant: PANalytical B.V.
    Inventors: Wilbert Alexander VAN LEMEL, Jaap BOKSEM
  • Patent number: 8199884
    Abstract: According to one embodiment, a slit mechanism apparatus includes, two slit plates configured to adjust a thickness of X-rays, two slit link bars which are pivotally supported on two ends of each of the two slit plates to interlock the two slit plates, two shafts on which the two slit link bars are respectively mounted to rotate the two slit link bars, two shutter plates configured to block/pass the X-rays, and two shutter link bars which are pivotally supported on two ends of each of the two shutter plates to interlock the two shutter plates and are mounted on the two shafts together with the two slit link bars.
    Type: Grant
    Filed: April 19, 2010
    Date of Patent: June 12, 2012
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Medical Systems Corporation
    Inventors: Sun Junjie, Zhang Jingjing, Wei He
  • Publication number: 20120106714
    Abstract: Apparatus for interrupting and/or scanning a beam of penetrating radiation, such as for purposes of inspecting contents of a container. A source, such as an x-ray tube, generates a fan beam of radiation effectively emanating from a source axis, with the width of the fan beam collimated by a width collimator, such as a clamshell collimator. An angular collimator, stationary during the course of scanning, limits the extent of the scan, and a multi-aperture unit, such as a hoop, or a nested pair of hoops, is rotated about a central axis, and structured in such a manner that beam flux incident on a target is conserved for different fields of view of the beam on the target. The central axis of hoop rotation need not coincide with the source axis.
    Type: Application
    Filed: October 25, 2011
    Publication date: May 3, 2012
    Applicant: AMERICAN SCIENCE AND ENGINEERING, INC.
    Inventors: Lee Grodzins, Jeffrey R. Schubert, Omar Al-Kofahi, Peter J. Rothschild
  • Patent number: 8085903
    Abstract: A shutter mechanism for collimating x-rays has two parallel drive shafts and two parallel guide shafts orthogonal to the drive shafts to define a rectangular aperture. Two flexible bands moving around a generally rectangular path about the aperture independently control the positions of each set of shutters. Two cams on the drive shafts control the positions of the flexible bands and shutters. A pair of transverse shutters made of an x-ray opaque material are held in sliding engagement between the drive shafts. One end of each transverse shutter is attached to the first flexible band adjacent to the drive shafts. Similarly, a pair of longitudinal shutters are held in sliding engagement between the drive shafts. One end of each longitudinal shutter is attached to the second flexible band adjacent to the guide shafts.
    Type: Grant
    Filed: September 9, 2009
    Date of Patent: December 27, 2011
    Inventor: Howard C. Thomas
  • Publication number: 20110293072
    Abstract: The present specification discloses a beam chopping apparatus, and more specifically, a helical shutter for an electron beam system that is employed in radiation-based scanning systems, and more specifically, a beam chopping apparatus that allows for variability in both velocity and beam spot size by modifying the physical characteristics or geometry of the beam chopper apparatus. The present specification also discloses a beam chopping apparatus which provides a vertically moving beam spot with substantially constant size and velocity to allow for substantially equal illumination of the target. In addition, the present specification is a beam chopping apparatus that is lightweight and does not cause an X-ray source assembly employing the beam chopper to become heavy and difficult to deploy.
    Type: Application
    Filed: March 14, 2011
    Publication date: December 1, 2011
    Inventor: Joseph W. Kaminski
  • Patent number: 7916834
    Abstract: A hand-held, self-contained x-ray fluorescence (XRF) analyzer produces a small x-ray spot on a sample to interrogate the elemental composition of a sample region of millimeter-size characteristic dimension. The analyzer includes a collimator for aiming an x-ray beam toward a desired location on the sample and for determining the size of the spot produced on the sample. The analyzer may include a digital camera oriented toward the portion of the sample that is, or would be, interrogated by the x-ray spot to facilitate aiming the analyzer. The analyzer may generate a reticule in a displayed image to indicate the portion of the sample that is, or would be, illuminated by the x-ray beam. The analyzer may automatically annotate the image of the sample with text or graphics that contain information about the analyzed sample. The image may be stored in the hand -held analyzer or provided for external storage or display.
    Type: Grant
    Filed: February 11, 2008
    Date of Patent: March 29, 2011
    Assignee: Thermo Niton Analyzers LLC
    Inventors: Stanislaw Piorek, Mark Hamilton, Kenneth P. Martin, Pratheev Sreetharan, Michael E. Dugas, Paul Estabrooks, Lee Grodzins
  • Patent number: 7835487
    Abstract: Imaging apparatus, for analyzing an object, comprising: a radiation source for transmission of radiation through said object in a section plane of said object; a radiation detector for detecting said radiation in said section plane of said object after transmission through said object; and a masking device for masking out a part of said radiation, wherein said masked part of said radiation is movable in said section plane relative to said radiation detector during said analysis of said object.
    Type: Grant
    Filed: July 4, 2007
    Date of Patent: November 16, 2010
    Assignee: Helmholtz Zentrum Mü Deutsches Forscshungszentrum fur Gesundheit and Umwelt (GmbH)
    Inventors: Oleg Tischenko, Christoph Hoeschen
  • Patent number: 7820992
    Abstract: A neutron chopper according to the present invention includes a housing which internally forms a sealed space, the housing having window portions through which neutrons pass, a fixed shaft which is fixed inside the housing, a rotor which is rotatably supported by the fixed shaft, the rotor provided with a blocking portion which can block neutrons passing through the housing, and a motor which is provided inside the housing for rotating the rotor of the neutron chopper, where a stator of the motor is fixed to the fixed shaft, and a rotor of the motor receives a rotating force from the stator around the fixed shaft, and is fixed to the rotor of the neutron chopper. The neutron chopper is formed with small size, and neutron guides are easily disposed closely, consequently vacuum leak is hardly occurred in the neutron chopper.
    Type: Grant
    Filed: July 25, 2008
    Date of Patent: October 26, 2010
    Assignee: Kobe Steel, Ltd.
    Inventor: Katsuhiko Yoshida
  • Patent number: 7813479
    Abstract: The invention relates to an X-ray device with an X-ray radiation source and with a preferably digital detector, which is placed in the beam path of the radiation source behind the object, particularly behind a patient. Scattered-rays are suppressed by means of a scanning device that scans the object and the detector only in sections. During a half-scanning process, the X-ray image is composed of half images, one image half being faded out.
    Type: Grant
    Filed: December 5, 2005
    Date of Patent: October 12, 2010
    Assignee: Siemens Aktiengesellschaft
    Inventor: Philipp Bernhardt
  • Patent number: 7706508
    Abstract: The invention is directed to an x-ray flux management device that adaptively attenuates an x-ray beam to limit the incident flux reaching a subject and radiographic detectors in potentially high-flux areas while not affecting the incident flux and detector measurements in low-flux regions. While the invention is particularly well-suited for CT, the invention is also applicable with other x-ray imaging systems. In addition to reducing the required detector system dynamic range, the present invention provides an added advantage of reducing radiation dose.
    Type: Grant
    Filed: October 12, 2007
    Date of Patent: April 27, 2010
    Assignee: General Electric Company
    Inventors: Jerome Stephen Arenson, David Ruimi, Oded Meirav, Robert Harry Armstrong
  • Publication number: 20100061519
    Abstract: A shutter mechanism for collimating x-rays has two parallel drive shafts and two parallel guide shafts orthogonal to the drive shafts to define a rectangular aperture. Two flexible bands moving around a generally rectangular path about the aperture independently control the positions of each set of shutters. Two cams on the drive shafts control the positions of the flexible bands and shutters. A pair of transverse shutters made of an x-ray opaque material are held in sliding engagement between the drive shafts. One end of each transverse shutter is attached to the first flexible band adjacent to the drive shafts. Similarly, a pair of longitudinal shutters are held in sliding engagement between the drive shafts. One end of each longitudinal shutter is attached to the second flexible band adjacent to the guide shafts.
    Type: Application
    Filed: September 9, 2009
    Publication date: March 11, 2010
    Inventor: Howard C. Thomas
  • Publication number: 20090310738
    Abstract: Imaging apparatus, for analyzing an object, comprising: a radiation source for transmission of radiation through said object in a section plane of said object; a radiation detector for detecting said radiation in said section plane of said object after transmission through said object; and a masking device for masking out a part of said radiation, wherein said masked part of said radiation is movable in said section plane relative to said radiation detector during said analysis of said object.
    Type: Application
    Filed: July 4, 2007
    Publication date: December 17, 2009
    Applicant: Helmholtz Zentrum Munchen Deutsches Forschungszentrum fur Gesundheit und Umwelt(GmbH)
    Inventors: Oleg Tischenko, Christoph Hoeschen
  • Patent number: 7593510
    Abstract: An inspection system based on penetrating radiation in which the field of view of a scan may be varied. First and second primary limiting apertures are provided for interposition between a source of penetrating radiation and an inspected object. This allows for significantly increasing the flux of penetrating radiation on this narrowed region of interest, thereby advantageously improving detectability. The relative position of the source with respect to either the first or the second aperture may be varied, in a direction either along, or transverse to, a normal to the aperture.
    Type: Grant
    Filed: October 22, 2008
    Date of Patent: September 22, 2009
    Assignee: American Science and Engineering, Inc.
    Inventor: Peter J. Rothschild
  • Publication number: 20090175413
    Abstract: An X-ray device for irradiating a beam of X-rays on an object to capture an X-ray image of the object is smaller in size and weight than conventional ones. The X-ray device includes an X-ray tube for generating the beam of X-rays and irradiating the beam of X-rays on the object, a shutter arranged around an X-ray irradiation axis for regulating an X-ray irradiation region on which the beam of X-rays is irradiated through the object, and a visual indicator unit arranged on the shutter for movement together with the shutter, the visual indicator unit being designed to visually indicate the X-ray irradiation region. In the X-ray device, the X-ray irradiation region is visually indicated by laser light without having to use a lamp otherwise provided between the X-ray tube and the shutter.
    Type: Application
    Filed: January 7, 2009
    Publication date: July 9, 2009
    Applicant: POSKOM CO., LTD.
    Inventors: Ki-Bong Sung, Jong-Lae Park
  • Publication number: 20090141865
    Abstract: A shielded sample cell insertion and removal apparatus for an x-ray analysis instrument, including a sample cell setting to hold a sample cell, an outer surface of which exposes the sample to an x-ray engine; and a shielded area positioned over the sample cell, to shield an area beyond the sample cell from x-rays transmitted from the x-ray engine. Upon moving the apparatus into and out of the instrument, the sample cell is moved into and out of an analysis position, while retaining shielding of areas beyond the sample cell from x-rays transmitted from the x-ray engine of the instrument.
    Type: Application
    Filed: December 2, 2008
    Publication date: June 4, 2009
    Applicant: X-RAY OPTICAL SYSTEMS, INC.
    Inventors: Rory D. DELANEY, Brian W. GALLAGHER
  • Patent number: 7539284
    Abstract: A method and system for performing fluoroscopic imaging of a subject has high temporal and spatial resolution in a center portion of the captured dynamic images. The system provides for reduced X-ray dose to the patient associated with that part of the X-ray beam associated with a peripheral portion of the captured images although temporal, and in some embodiments spatial, resolution is reduced in the peripheral portion of the image. The system uses a rotating collimator to produce an X-ray beam having narrow wing portions associated with the peripheral portions of the image, and a broader central region associated with the high resolution center portion of the images.
    Type: Grant
    Filed: January 22, 2008
    Date of Patent: May 26, 2009
    Inventor: Guy M. Besson
  • Publication number: 20090103686
    Abstract: An inspection system based on penetrating radiation in which the field of view of a scan may be varied. First and second primary limiting apertures are provided for interposition between a source of penetrating radiation and an inspected object. This allows for significantly increasing the flux of penetrating radiation on this narrowed region of interest, thereby advantageously improving detectability. The relative position of the source with respect to either the first or the second aperture may be varied, in a direction either along, or transverse to, a normal to the aperture.
    Type: Application
    Filed: October 22, 2008
    Publication date: April 23, 2009
    Applicant: AMERICAN SCIENCE AND ENGINEERING, INC.
    Inventor: Peter J. Rothschild
  • Publication number: 20080285715
    Abstract: A shadow aperture backscatter radiography (SABR) system includes at least one penetrating radiation source for providing a penetrating radiation field, and at least one partially transmissive radiation detector, wherein the partially transmissive radiation detector is interposed between an object region to be interrogated and the radiation source. The partially transmissive radiation detector transmits a portion of the illumination radiation field. A shadow aperture having a plurality of radiation attenuating regions having apertures therebetween is disposed between the radiation source and the detector. The apertures provide illumination regions for the illumination radiation field to reach the object region, wherein backscattered radiation from the object is detected and generates an image by the detector in regions of the detector that are shadowed by the radiation attenuation regions.
    Type: Application
    Filed: April 30, 2008
    Publication date: November 20, 2008
    Inventors: Daniel Shedlock, Alan M. Jacobs, Edward T. Dugan, Sharon Auerback Jacobs
  • Publication number: 20080273664
    Abstract: The invention relates to an X-ray device with an X-ray radiation source and with a preferably digital detector, which is placed in the beam path of the radiation source behind the object, particularly behind a patient. Scattered-rays are suppressed by means of a scanning device that scans the object and the detector only in sections. During a half-scanning process, the X-ray image is composed of half images, one image half being faded out.
    Type: Application
    Filed: December 5, 2005
    Publication date: November 6, 2008
    Inventor: Philipp Bernhardt
  • Publication number: 20080247515
    Abstract: The invention concerns a rotor combining the advantages of a single-piece wheel, which, when it is operating, only exhibits a slight and constant variation in shape (expansion shift) in the guiding region of its path, with those of a rimmed rotor with spokes, enabling, by virtue of its light weight, the bearings to be easily arranged. Further, because of its tendency to exhibit a tensile stress higher than a bending load, the rotor provides for a wide selection of rotor materials. The rotor has at least one segment arranged on the hub, enclosing at least a closed recess. A preferred embodiment concerns a rotor comprising at least three rotor segments uniformly distributed, said segments having each two recesses, such that the regions of materials surrounding them are in the form of three spokes arranged substantially parallel. The inventive rotor is particularly suitable for receiving graphite crystals, in the form or a vibrating disc for a back-scattering spectrometer.
    Type: Application
    Filed: January 8, 2005
    Publication date: October 9, 2008
    Inventors: Ulrich Probst, Hans Kammerling, Tadeusz Kozielewski, Heidi Straatmann, Peter Rottlander, Thomas Koppitz
  • Patent number: 7352844
    Abstract: The system and method described herein facilitate back-to-back automatic scanning of moving vehicles without have the vehicles stop in the scanning zone. The system includes a scanning zone that comprises a radiation source and a radiation source detector. The system further includes a first sensor component for automatically sensing when a first portion of the moving target has passed through the scanning zone and a second portion of the moving target is about to enter the scanning zone, wherein the first sensor component sends a signal to the automated target inspection system to initiate a scan of the second portion upon sensing that the second portion of the target is about to enter the scanning zone.
    Type: Grant
    Filed: April 2, 2007
    Date of Patent: April 1, 2008
    Assignee: Science Applications International Corporation
    Inventors: Ernest E. Muenchau, Rex D Richardson
  • Patent number: 7308076
    Abstract: A method and system include at least one X-ray source for producing at least one X-ray beam, at least one detector assembly, at least one shutter, and a barcode reader. The shutter directs the at least one X-ray beam toward the detector assembly. The barcode reader is affixed, in a predetermined proximity, to the shutter for detecting a barcode on an object that is moved along the shutter thereby causing the shutter to be opened from a closed state and/or fully closed once the barcode has been detected.
    Type: Grant
    Filed: April 17, 2002
    Date of Patent: December 11, 2007
    Assignee: Smiths Heimann GmbH
    Inventors: Wolfgang Studer, Erwin Kirsten
  • Patent number: 7298820
    Abstract: A radiation therapy system produces a treatment beam that is detected by an electronic portal imaging device (EPID) after it passes through the subject being treated. A chopper wheel modulates low energy components of the beam while leaving the higher energy components substantially unmodulated. Modulated components in the image signals produced by the EPID are detected and used to produce portal images.
    Type: Grant
    Filed: March 31, 2006
    Date of Patent: November 20, 2007
    Assignee: Wisconsin Alumni Research Foundation
    Inventor: Ian A. Nelson
  • Patent number: 7263171
    Abstract: With a view to providing a beam diaphragm having a large maximum value of aperture opening under a limited profile dimension, the beam diaphragm comprises a pair of control rings having coaxial apertures for the passage of X-rays therethrough and being opposed to each other axially through a spacing and coaxially rotatable independently of each other, a blade positioned between the pair of control rings, and position adjusting means which, in accordance with a relative rotation of the pair of control rings, causes the blade to move toward or away from a common axis of the apertures so as to describe a sectorial plane whose radius increases or decreases continuously.
    Type: Grant
    Filed: October 5, 2005
    Date of Patent: August 28, 2007
    Assignee: GE Medical Systems Global Technology Company, LLC
    Inventor: Chen Zhang
  • Patent number: 7215738
    Abstract: The system and method described herein facilitate back-to-back automatic scanning of moving vehicles without have the vehicles stop in the scanning zone. The system includes a scanning zone that comprises a radiation source and a radiation source detector. The system further includes a first sensor component for automatically sensing when a first portion of the moving target has passed through the scanning zone and a second portion of the moving target is about to enter the scanning zone, wherein the first sensor component sends a signal to the automated target inspection system to initiate a scan of the second portion upon sensing that the second portion of the target is about to enter the scanning zone.
    Type: Grant
    Filed: March 9, 2006
    Date of Patent: May 8, 2007
    Assignee: Science Applications International Corporation
    Inventors: Ernest E. Muenchau, Rex D Richardson
  • Patent number: 7164143
    Abstract: A radiation source comprising: a source of radiation; a plate having an aperture formed therein, said aperture facing the source of radiation; and means for moving the source when no radiation is desired on the side of the plate away from the source.
    Type: Grant
    Filed: February 11, 2003
    Date of Patent: January 16, 2007
    Assignee: Elgems Ltd.
    Inventor: Naor Wainer
  • Patent number: 7123680
    Abstract: An X-ray computer tomography apparatus includes an X-ray tube, an X-ray detector, a data collection apparatus that collects X-ray signals from the X-ray detector repeatedly, a shutter mechanism that is arranged between the X-ray tube and a subject in order to convert an X-ray into a pulse-like X-ray and is constituted such that a ratio of a shutter open period and a shutter close period is variable, a restructuring unit that restructures image data on the basis of the collected X-ray signals, and a control unit that controls the shutter mechanism in order to change the ratio of a shutter open period and a shutter close period during a helical scan.
    Type: Grant
    Filed: September 16, 2004
    Date of Patent: October 17, 2006
    Assignee: Toshiba Medical Systems Corporation
    Inventors: Kazuhiro Katada, Toshihiro Rifu
  • Patent number: 7113566
    Abstract: A method for inspection of a sample includes directing a beam of X-rays toward a sample and configuring an array of detector elements to capture the X-rays scattered from the sample. The sample is shifted in a direction parallel to the axis of the array between at least first and second positions, which positions are separated one from another by an increment that is not an integer multiple of the pitch of the array. At least first and second signals are generated by the detector elements responsively to the X-rays captured thereby while the sample is in at least the first and second positions, respectively. The first and second signals are combined so as to determine an X-ray scattering profile of the sample as a function of position along the axis.
    Type: Grant
    Filed: July 15, 2005
    Date of Patent: September 26, 2006
    Assignee: Jordan Valley Applied Radiation Ltd.
    Inventors: Asher Peled, Isaac Mazor, Boris Yokhin
  • Patent number: 7102832
    Abstract: A chopper for an imaging system includes a frame and a sheet that have different coefficients of thermal expansion. The frame has a space within it, and has at least one opening that allows radiation to pass through the space. The sheet has structure which influences radiation passing through the sheet, and the sheet is movably disposed within the space in the frame, in a manner so that the sheet can expand and contract relative to the frame in a direction approximately parallel to the sheet. The frame prevents any significant movement of the sheet in a direction transverse to the sheet.
    Type: Grant
    Filed: June 10, 2003
    Date of Patent: September 5, 2006
    Assignee: L-3 Communications Corporation
    Inventors: Alexander L. Kormos, Paul D. Felts
  • Patent number: 7091508
    Abstract: A method of performing a medical procedure includes providing a radiation-shielding cubicle having an interior defining a medical personnel region and including a first wall having an opening therein, locating the cubicle with respect to an x-ray table so a portion of the x-ray table extends through the opening into the interior of the cubicle, and separating medical personnel from an x-ray emitter disposed outside of the cubicle using the first wall to shield the medical personnel from radiation emitted by the x-ray emitter.
    Type: Grant
    Filed: November 24, 2003
    Date of Patent: August 15, 2006
    Assignee: ECO Cath-Lab Systems, Inc.
    Inventor: James A. Goldstein
  • Patent number: 7050544
    Abstract: An X-ray diagnostic device has an X-ray tube and a diaphragm housing in which diaphragm plates for limiting an X-ray field are contained, as are a lamp and a mirror. The lamp and mirror are configured so that, when the lamp is on, the light therefrom is reflected by the mirror so that the reflected ray field coincides with the hypothetical X-ray field. At least one filter for filtering the X-rays is disposed in the diaphragm housing. The mirror and the filter or filters are attached to a single disk that rotates around an axis such that either the mirror or a filter is within the hypothetical X-ray field.
    Type: Grant
    Filed: August 18, 2004
    Date of Patent: May 23, 2006
    Assignee: Siemens Aktiengesellschaft
    Inventors: Stefan Karlsson, Rob Olthoff
  • Patent number: 7046768
    Abstract: A shutter-shield system for radiation protection is applied to a an x-ray generator in a shielded station for inspecting products moving through the station on a conveyor. Deployed in a sliding attachment on a collimator housing of the x-ray generator, a shutter plate is made movable by an actuator and is configured with an aperture that, in the absence of power applied to the actuator, is made to align with a fixed aperture of the collimator so as to allow emission of the x-ray beam as required for normal inspection purposes. Whenever an anomaly in the product loading on the conveyer creates a gap that could otherwise cause an increase in environmental radiation levels, powering the actuator moves the shutter plate to an offset location that offsets the apertures to an effectively closed state to initiate a standby condition wherein x-ray radiation is substantially confined to the interior region of the collimator, without having to shut down the x-ray generator itself.
    Type: Grant
    Filed: November 10, 2003
    Date of Patent: May 16, 2006
    Assignee: InspX LLC
    Inventor: Alexander I. Gilevich
  • Patent number: 7010094
    Abstract: A system and method for inspecting an object, the system and method comprising a source for generating a penetrating radiation beam for irradiating the object, the beam having, for each instant of time, an instantaneous energy spectrum of intensity, a shaper for modulating the generated beam, thereby creating a shaped beam, the shaper comprising at least a first section and a second section, the first section attenuating the intensity of a portion of the generated beam by a first attenuation factor and the second section attenuating the intensity of another portion of the generated beam by a second attenuation factor, and at least one detector for detecting the shaped beam after the shaped beam interacts with the object. The source may scan a beam across an object while the source and at least one detector are moving on a platform capable of highway travel or on an inspection module movable with respect to the object.
    Type: Grant
    Filed: May 31, 2002
    Date of Patent: March 7, 2006
    Assignee: American Science and Engineering, Inc.
    Inventors: Lee Grodzins, Peter Rothschild, Roderick D. Swift
  • Patent number: 6934363
    Abstract: A radiation diaphragm for an X-ray apparatus has an absorber element that can be swiveled around a swiveling axis for the variable limitation of a ray bundle. The swiveling axis is oriented transversely to the ray bundle. A swivel arm that can be swiveled around the swiveling axis and that carries the absorber element. The absorber element can comprise a curved shape. Such a radiation diaphragm allows an especially effective radiation dose limitation for the patient.
    Type: Grant
    Filed: December 2, 2002
    Date of Patent: August 23, 2005
    Assignee: Siemens Aktiengesellschaft
    Inventor: Matthias Seufert