Variable Patents (Class 378/150)
  • Patent number: 10376225
    Abstract: A scanning X-ray imaging device (100) is proposed. The device may be specifically adapted for mammography applications. The device comprises an X-ray source (110), an X-ray line detector (150), a field limiter arrangement (170) and an observation volume (135). The field limiter arrangement (170) comprises at least two variable shield plates (174, 175) enclosing an opening (176) and a displacing mechanism (177). The shield plates may be displaced with respect to a center axis of an X-ray beam (115) by means of the displacing mechanism such as to vary at least one of a cross-section and a location of the opening (176) between the field plates (174, 175) through which at least a part of the X-ray beam (115) is transmitted. The shield plates may be displaced independently from each other by means of the displacing mechanism (177).
    Type: Grant
    Filed: December 4, 2014
    Date of Patent: August 13, 2019
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventor: Per Mattias Myrman
  • Patent number: 10367403
    Abstract: Techniques for independent motion actuator are described herein. The techniques may include a first linear actuator, a first driven carriage to be driven by movement of the first linear actuator, and a first free carriage in line with the first linear actuator but being disengaged from the first linear actuator. The techniques may also include a second linear actuator substantially parallel to the first linear actuator. A second driven carriage is to be driven by movement of the second linear actuator, and a second free carriage in line with the second linear actuator but being disengaged from the second linear actuator and to be coupled to the first driven carriage.
    Type: Grant
    Filed: August 21, 2014
    Date of Patent: July 30, 2019
    Assignee: GENERAL ELECTRIC COMPANY
    Inventor: Nicholas Demianovich
  • Patent number: 10296199
    Abstract: A method and system for acquiring, processing, storing, and displaying x-ray mammograms Mp tomosynthesis images Tr representative of breast slices, and x-ray tomosynthesis projection images Tp taken at different angles to a breast, where the Tr images are reconstructed from Tp images.
    Type: Grant
    Filed: December 20, 2017
    Date of Patent: May 21, 2019
    Assignee: Hologic, Inc.
    Inventors: Nikolaos Gkanatsios, Loren Niklason, Ian Shaw, Christopher Ruth, Andrew P. Smith, Jay A. Stein
  • Patent number: 10188873
    Abstract: A first dose calculated using a first set of fluence maps and a first (faster) dose prediction model is accessed. A second fluence map is accessed. The second fluence map is projected onto the first set of fluence maps to deter me set of scalars and a residual value. When the residual value satisfies a criterion, a second dose is calculated using the first dose prediction model, the set of scalars, and the second fluence map. When the residual value does not satisfy the criterion, the second dose is calculated using a second (more accurate) dose prediction model and the second fluence map.
    Type: Grant
    Filed: March 22, 2017
    Date of Patent: January 29, 2019
    Assignee: Varian Medical Systems International AG
    Inventors: Esa Kuusela, Janne Nord, Joakim Pyyry, Perttu Niemela
  • Patent number: 10016171
    Abstract: A radiological imaging device including a gantry defining an analysis zone in which at least a part of the patient is placed, a source suitable to emit radiation, and a detector arranged to receive the radiation and to generate data signals based on the radiation received. The device also includes a horizontal gantry rotation apparatus having a ring to which the source and the detector are mounted and a rotational bearing member configured to rotate the ring. Also included is a control unit adapted to acquire an image from data signals received from the detector while the horizontal gantry rotation apparatus rotates the ring to scan the patient. The radiological imaging device can include at least one of a vertical gantry rotation apparatus, a lifter system, a roller support system, a cooling system, a source tilting device, and a translational apparatus configured to translation a position of the detector.
    Type: Grant
    Filed: November 4, 2015
    Date of Patent: July 10, 2018
    Assignee: Epica International, Inc.
    Inventors: Damiano Fortuna, Leonardo Manetti, Luca Ferretti, Denis Mattia De Micheli
  • Patent number: 9991014
    Abstract: The preferred embodiment of the disclosed invention comprises rotary actuators that move one or more x-ray attenuating plates in the x-y plane (ie. image plane). These x-ray attenuating plates attenuate the x-ray beam with thin metal sheets or plates that contain one or more apertures, which fully exposes the desired region of interest (ROI) while filtering the rest of the image, reducing the radiation exposure for the procedure. The devices will typically have a selection of many attenuation profiles. A small aperture or low attenuation profile region will result in a higher total exposure reduction and a large aperture or large attenuation profile will result in a smaller exposure reduction. The x-ray attenuating plate can be rotated to select an attenuation profile using a detent wheel.
    Type: Grant
    Filed: September 22, 2015
    Date of Patent: June 5, 2018
    Inventor: Daniel Gelbart
  • Patent number: 9966161
    Abstract: A method and mechanical design for a thin-film diamond crystal mounting apparatus for coherence preservation x-ray optics with optimized thermal contact and minimized crystal strain are provided. The novel thin-film diamond crystal mounting apparatus mounts a thin-film diamond crystal supported by a thick chemical vapor deposition (CVD) diamond film spacer with a thickness slightly thicker than the thin-film diamond crystal, and two groups of thin film thermal conductors, such as thin CVD diamond film thermal conductor groups separated by the thick CVD diamond spacer. The two groups of thin CVD film thermal conductors provide thermal conducting interface media with the thin-film diamond crystal. A piezoelectric actuator is integrated into a flexural clamping mechanism generating clamping force from zero to an optimal level.
    Type: Grant
    Filed: September 21, 2015
    Date of Patent: May 8, 2018
    Assignee: UChicago Argonne, LLC
    Inventors: Deming Shu, Yury Shvydko, Stanislav Stoupin, Kwang-Je Kim
  • Patent number: 9931088
    Abstract: A method is disclosed for displaying a selected acquisition field of view of a medical tomography apparatus in the region of a patient table of the tomography apparatus with the aid of an illumination device including at least one light source. In this regard, the illumination device includes at least one setting device for revealing and/or masking boundary areas of a field of illumination of the illumination device which are revealed or masked as a function of the selected acquisition field of view. An illumination device is also disclosed for this purpose.
    Type: Grant
    Filed: December 11, 2014
    Date of Patent: April 3, 2018
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Michael Grasruck, Bernhard Krauss, Martin Sedlmair
  • Patent number: 9848840
    Abstract: According to one embodiment, an X-ray diagnostic apparatus includes an X-ray tube, an X-ray detection unit, an X-ray filter, an input unit, and an X-ray filter support unit. The X-ray tube generates X-rays. The X-ray detection unit detects the X-rays transmitted through a subject. The X-ray filter is arranged between the X-ray tube and the object and has an opening. The X-ray filter support unit supports the X-ray filter so as to make the X-ray filter movable in an imaging axis direction of the X-rays.
    Type: Grant
    Filed: September 9, 2014
    Date of Patent: December 26, 2017
    Assignee: Toshiba Medical Systems Corporation
    Inventors: Shumpei Ohashi, Yoshimasa Kobayashi, Koichiro Watanabe
  • Patent number: 9844358
    Abstract: Systems, devices, and methods are presented for automatic tuning, calibration, and verification of radiation therapy systems comprising control elements configured to control parameters of the radiation therapy systems based on images obtained using electronic portal imaging devices (EPIDs) included in the radiation therapy system.
    Type: Grant
    Filed: June 4, 2014
    Date of Patent: December 19, 2017
    Assignees: VARIAN MEDICAL SYSTEMS, INC., VARIAN MEDICAL SYSTEMS INTERNATIONAL AG
    Inventors: Robert T. Wiggers, Daryl Leung, Reto W. Filiberti, Daniel Morf, Diana Kung, Stephen Gaudio
  • Patent number: 9795805
    Abstract: System and method for shaping the intensity profile of a radiation beam incident on a target volume. Embodiments according to the present disclosure include a multi-leaf collimator (MLC) capable of sharpening (e.g., “trimming”) a proton beam, the MLC having a reduced overall weight. Leaves of the MLC according to embodiments of the present disclosure have two regions of different density, where a high density region is proximal to a radiation beam so as to block a portion of the beam, and a lower density region provides structural integrity to the leaf while reducing overall MLC weight.
    Type: Grant
    Filed: September 25, 2015
    Date of Patent: October 24, 2017
    Assignees: Varian Medical Systems, Inc., Varian Medical Systems International AG
    Inventors: Dave Mellenberg, Wolfgang Kaissl, Jan Timmer
  • Patent number: 9757588
    Abstract: A system and method for developing radiation therapy plans and a system and method for developing a radiation therapy plan to be used in a radiation therapy treatment is disclosed. A radiation therapy plan is developed using a registration of medical images. The registration is based on identifying landmarks located within inner body structures.
    Type: Grant
    Filed: May 1, 2007
    Date of Patent: September 12, 2017
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Michael Kaus, Vladimir Pekar, Rafael Wiemker
  • Patent number: 9554767
    Abstract: The present invention pertains to an apparatus and method for adaptive exposure in imaging systems. An x-ray source for producing x-ray radiation and an x-ray detector for measuring amount of x-ray radiation passing through the human patient and striking the detector can be used. A tomographic image of the human patient or a tomosynthetic image of the human patient can be generated. Region of interest filtering and equalization filtering can be utilized. Filtering can be accomplished with a mechanical shield or shutter or with electronic control of the x-ray source.
    Type: Grant
    Filed: February 8, 2016
    Date of Patent: January 31, 2017
    Assignee: Triple Ring Technologies, Inc.
    Inventors: Tobias Funk, Steve Denis Burion, Kate LeeAnn Bechtel, Joseph Anthony Heanue, Brian Patrick Wilfley, Augustus Percival Lowell
  • Patent number: 9460822
    Abstract: The present invention relates to a method and an X-ray apparatus comprising an X-ray source, an x-ray detector, and at least a first collimator having a first active position and a second collimator having a second active position for forming a bundle of X-ray beams, wherein both of said active positions are located in a substantially straight path between said X-ray source and said detector, but at different distances from said X-ray source. The X-ray apparatus further comprises a selector arrangement for switching one of said first or second collimators in said first or second active position, whereby when one of said first or second collimators is in an active position the other collimator is in an inactive position.
    Type: Grant
    Filed: October 24, 2011
    Date of Patent: October 4, 2016
    Assignee: Koninklijke Philips N.V.
    Inventors: Mats Danielsson, Torbjörn Hjärn, Daniel Säll, Markus Wahlberg
  • Patent number: 9437339
    Abstract: The invention relates to a leaf assembly (102) for a multi-leaf collimator, comprising a leaf frame (104) and a plurality of leaves (106) for shielding beams (108) from a selected area, wherein the leaves (106) are arranged sideways and adjacently in the leaf frame (104) for shielding beams (108) being emitted from a radiation source (110) located above the assembly (102), wherein each leaf (106) is mounted in the leaf frame (104) displaceably in an adjusting direction (112) being oriented perpendicularly related to said beams (108), and wherein the leaf frame (104) provides a linear guidance (114) for each leaf (106) within the adjusting direction (112), being designed in a such a way that the leaf frame (104) is adapted to allow for lateral movement of the leaves (106) superposing said linear guidance (114), thus allowing mutual abutting of the leaves (106).
    Type: Grant
    Filed: July 18, 2013
    Date of Patent: September 6, 2016
    Assignees: Deutsches Krebsforschungszentrum, Precisis AG
    Inventor: Gernot Echner
  • Patent number: 9414792
    Abstract: A CT apparatus for scanning an object is provided. An x-ray source is provided, wherein the x-ray source provides a collimated x-ray beam with a cross-section. A plurality of wedges is provided between the source and object. An actuator is connected to the wedges for moving the wedges substantially perpendicular to the length of the cross-section of the collimated x-ray beam. An x-ray detector is located on an opposite side of the object from the x-ray source and is for detecting x-rays that pass through the object and the plurality of wedges. A gantry rotates the x-ray source, the plurality of wedges, and the x-ray detector around an axis of rotation. A detection system measures the relative position of the plurality of wedges. The detection system comprises an optical sensor and a plurality of optical markers, where each wedge has at least one optical marker attached.
    Type: Grant
    Filed: June 10, 2014
    Date of Patent: August 16, 2016
    Assignee: THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY
    Inventors: Scott Hsieh, Norbert J. Pelc
  • Patent number: 9414801
    Abstract: Disclosed herein are an X-ray imaging apparatus and a control method therefor in which a region of a compressed breast is measured by a touch sensor and a collimator is controlled such that an X-ray emission region corresponds to the measured region of a compressed breast, whereby workflow for performing X-ray imaging may be reduced and subject pain due to breast compression may be alleviated. The X-ray imaging apparatus includes an X-ray source to generate X-rays and irradiate an object with the generated X-rays, a collimator to adjust an emission region of the X-rays generated from the X-ray source, an X-ray detector to detect X-rays having passed through the object to acquire X-ray data, a touch sensor disposed above the X-ray detector, a compression paddle to compress the object placed on the touch sensor, and a collimator control unit to calculate location and size of the compressed object based on an output value of the touch sensor and control the collimator based on calculation results.
    Type: Grant
    Filed: February 28, 2014
    Date of Patent: August 16, 2016
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jong Pil Kim, So Dam Baek
  • Patent number: 9402587
    Abstract: In an embodiment, a method includes at least moving a patient table through a measurement region of the computed tomography device, the movement of the patient having at least one phase of variable speed during the projection recording, time-solved determination or recording of the patient table position, time-resolved recording of projections of at least one part of an examination object moving with the table, the number of the slices contributing to the recording being varied during the at least one phase of variable speed of the patient table as a function of the table speed in such a way that the quotient formed from the current table speed divided by the number of the slices contributing to the recording is constant so that the pitch factor is kept constant during the projection recording, and time-resolved determination or recording of the number or slices contributing to the projection recording.
    Type: Grant
    Filed: July 8, 2014
    Date of Patent: August 2, 2016
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Thomas Allmendinger, Winrich Heidinger
  • Patent number: 9392984
    Abstract: A CT apparatus for scanning an object is provided. An x-ray source is provided, wherein the x-ray source provides a collimated x-ray beam with a cross-section with a length and thickness. A plurality of wedges is provided between the source and object. An actuator is connected to the wedges for moving the wedges substantially perpendicular to the length of the cross-section of the collimated x-ray beam. An x-ray detector is located on an opposite side of the object from the x-ray source and is for detecting x-rays that pass through the object and the plurality of wedges. A gantry rotates the x-ray source, the plurality of wedges, and the x-ray detector around an axis of rotation.
    Type: Grant
    Filed: June 14, 2012
    Date of Patent: July 19, 2016
    Assignee: The Board of Trustees of the Leland Stanford Junior University
    Inventors: Norbert J. Pelc, Scott Hsieh
  • Patent number: 9324468
    Abstract: A collimation assembly includes a multileaf collimator and motion assembly. The multileaf collimator includes a support body and a plurality of pairs of beam blocking leaves supported by the support body. The beam blocking leaves are longitudinally movable in a first direction. The motion assembly includes an actuator and a guide assembly operable to move the support body and thereby allowing the plurality of pairs of beam blocking leaves to move in a second direction generally transverse to the first direction.
    Type: Grant
    Filed: August 23, 2010
    Date of Patent: April 26, 2016
    Assignee: Varian Medical Systems, Inc.
    Inventors: Stanley Mansfield, Steven W. Prince
  • Patent number: 9312038
    Abstract: The present invention includes: X-ray shielding materials; X-ray shielding material mounting plates to which the X-ray shielding portions are fixed; a driven side link and a driving side link that connect the two X-ray shielding material mounting plates to each other so that the X-ray shielding portions face each other and cross each other; connecting portions that connect each of the X-ray shielding material mounting plates to the driven side link and the driving side link; and a driving device that drives the driving side link so as to rotate. Connecting portions and are provided at positions not interfering with a movable region of the X-ray shielding material mounting plates formed in conjunction with the rotational driving of the driven side link and the driving side link. The X-ray shielding material mounting plates are moved by the rotational driving of the driving side link and accordingly, the slit width between the X-ray shielding materials is changed.
    Type: Grant
    Filed: May 30, 2012
    Date of Patent: April 12, 2016
    Assignee: HITACHI MEDICAL CORPORATION
    Inventors: Norifumi Takagaki, Tsutomu Suzuki, Mikio Mochitate
  • Patent number: 9254114
    Abstract: The present invention pertains to an apparatus and method for adaptive exposure in imaging systems. An x-ray source for producing x-ray radiation and an x-ray detector for measuring amount of x-ray radiation passing through the human patient and striking the detector can be used. A tomographic image of the human patient or a tomosynthetic image of the human patient can be generated. Region of interest filtering and equalization filtering can be utilized. Filtering can be accomplished with a mechanical shield or shutter or with electronic control of the x-ray source.
    Type: Grant
    Filed: September 25, 2014
    Date of Patent: February 9, 2016
    Assignee: Triple Ring Technologies, Inc.
    Inventors: Tobias Funk, Steve Denis Burion, Augustus Percival Lowell, Kate LeeAnn Bechtel, Joseph Anthony Heanue, Brian Patrick Wilfley
  • Patent number: 9170216
    Abstract: A pinhole detection system of a fuel cell element unit including a density measurement module that calculates a density of a fuel cell element unit using weight and volume data measured from electronic weight balance and 3D scan type volume integrator. Photon energy ranges of X-ray beam and window species of the pinhole detection system automatically are selected from Group 1 or Group 2 according to the density reference point for a fuel cell element, and a stage on which a fuel cell element unit is disposed to be detected. A drive portion that moves the stage to rotate the fuel cell element unit. An X-ray source is disposed at one side of the stage to apply X-ray to the fuel cell element unit that rotates. An image detector detects an X-ray penetrating the fuel cell element unit, and a computer tomography that reconstructs a three dimensional tomogram.
    Type: Grant
    Filed: January 8, 2014
    Date of Patent: October 27, 2015
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Sang Yeoul Ahn, Keun Je Lee, Sang Hyun Cho, Jea Suk Park, Sung Keun Lee, Byung Ki Ahn, Tae Won Lim
  • Patent number: 9123450
    Abstract: A method and apparatus for inspecting an object is present. Radiation is emitted from a radiation source. A beam is formed from a portion of the radiation emitted by the radiation source using a collimator. The collimator is connected to the radiation source by a bearing system comprising a first structure associated with the radiation source and a second structure connected to the first structure. The second structure is configured to hold the collimator. The second structure of the bearing system is moved using a movement system such that the second structure rotates in one of a plurality of directions substantially about a center point in the radiation source while the radiation source remains stationary relative to the second structure. Rotation of the second structure substantially about the center point in the radiation source changes a direction in which the beam is directed.
    Type: Grant
    Filed: April 30, 2012
    Date of Patent: September 1, 2015
    Assignee: The Boeing Company
    Inventors: Michael Liesenfelt, William Talion Edwards, Daniel Shedlock
  • Patent number: 9084581
    Abstract: An X-ray imaging system that allows X-ray images to be acquired from a desired direction by considering the tilt of a tabletop. The X-ray imaging system includes a support unit that holds an X-ray imaging unit that performs X-ray imaging of a subject. The subject is placed on the tabletop. A memory stores in advance imaging angle information from previous imaging. A tilt detector detects the tilt angle of the tabletop. A calculator calculates a correction angle for correcting the imaging angle information based on the imaging angle information and on the tilt angle. A drive unit moves the support unit to a position based on the imaging angle information and the correction angle.
    Type: Grant
    Filed: December 5, 2011
    Date of Patent: July 21, 2015
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Medical Systems Corporation
    Inventors: Ryuji Zaiki, Teruomi Gunji, Katsuie Ikawa
  • Patent number: 9050060
    Abstract: An X-ray imaging system that allows X-ray images to be acquired from a desired direction by considering the tilt of a tabletop. The X-ray imaging system includes a support unit that holds an X-ray imaging unit that performs X-ray imaging of a subject. The subject is placed on the tabletop. A memory stores in advance imaging angle information from previous imaging. A tilt detector detects the tilt angle of the tabletop. A calculator calculates a correction angle for correcting the imaging angle information based on the imaging angle information and on the tilt angle. A drive unit moves the support unit to a position based on the imaging angle information and the correction angle.
    Type: Grant
    Filed: December 5, 2011
    Date of Patent: June 9, 2015
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Medical Systems Corporation
    Inventors: Ryuji Zaiki, Teruomi Gunji, Katsuie Ikawa
  • Patent number: 9042521
    Abstract: Method for limiting an X-ray beam, wherein the X-ray beam is limited by a limiting unit comprising a couple of blades approaching each other or moving away from each other to adjust the width of a space between the blades the two blades being driven by an actuator (12) linked to both blades. The position of a symmetry axis (S) of the space between the blades is set in a shifting step by changing the distance between the blades and by impeding the motion of one blade in comparison with the motion of the other blade resulting in an asymmetric motion of the blades with respect to an initial position of the symmetry axis (S). The desired width (W) of the space between the blades is set in an adjustment step by an unimpeded symmetric motion of the blades with respect to the position of the symmetry axis (S) set in the shifting step.
    Type: Grant
    Filed: February 22, 2013
    Date of Patent: May 26, 2015
    Assignee: CEFLA SOCIETA COOPERATIVA
    Inventors: Antonio Becca, Davide Bianconi, Dario Righini
  • Patent number: 9042514
    Abstract: Among other things, one or more systems and/or techniques are described for dynamically adjusting, in a fan-angle direction, attenuation of radiation during an examination of an object such that portions of the object that are not represented in resulting (tilted/targeted) images of the object are exposed to less radiation than portions of the object that are represented in resulting (tilted/targeted) images of the object. As a rotating gantry is rotated, blades of a pre-object collimator are dynamically repositioned to selectively attenuate emitted radiation. A collimator adjustment component may be configured to determine how to reposition the blades based at least in part upon at least one of a desired tilt of the resulting (tilted) image(s), a translational position of the object, and a gantry rotation angle, for example.
    Type: Grant
    Filed: May 18, 2012
    Date of Patent: May 26, 2015
    Assignee: Analogic Corporation
    Inventors: Doug Abraham, Lane Howitt, Mitchell Surowiec, Carl DeVincent, David Rozas
  • Patent number: 9036779
    Abstract: A variable mode X-ray transmission system is provided that can be operated in low or high dose rate modes depending upon the area or portion of the vehicle to be screened. In one embodiment, variable dose rate is achieved by use of a novel collimator. The systems disclosed in this application enable the scanning of a vehicle cab portion (occupied by people, such as a driver) at low dose rate, which is safe for human beings, while allowing the scanning of the cargo portion (unoccupied by people) at a high dose rate. Rapid switching from low dose rate to high dose rate operating mode is provided, while striking a balance between high material penetration for cargo portion and low intensity exposure that is safe for occupants in the cab portion of the inspected vehicle.
    Type: Grant
    Filed: February 7, 2012
    Date of Patent: May 19, 2015
    Assignee: Rapiscan Systems, Inc.
    Inventor: Edward James Morton
  • Publication number: 20150131781
    Abstract: A movable diaphragm unit is configured such that, when a restricting blade is moved away from a normal line extending from a center of a focal spot of X-ray to a first virtual plane including a detector plane, a moving distance of a crossing line of a second virtual plane including an end surface of the restricting blade and a third virtual plane including the focal spot with respect to a center of the focal spot becomes shorter than a moving distance with respect to the normal line of the end surface.
    Type: Application
    Filed: November 6, 2014
    Publication date: May 14, 2015
    Inventors: Yasuo Ohashi, Kazuyuki Ueda
  • Patent number: 9031204
    Abstract: A leaf module for a multi-leaf collimator comprises a leaf unit and a leaf drive unit. The leaf unit comprises a leaf for shielding beams from a selected area. The leaf unit is mounted displaceably in an adjusting direction with relation to the leaf drive unit. The leaf drive unit is designed to displace the leaf unit linearly in the adjusting direction. The leaf drive unit comprises at least one drive mechanism which operates based on piezoelectric actuation, being designed such that the leaf drive unit thoroughly encloses the leaf unit within a plane being oriented substantially perpendicularly related to the adjusting direction. The multi-leaf collimator can comprise a plurality of leaf modules while being shaped as compact as possible. Both precise and stable adjustability of the leaf unit is achieved with the leaf module.
    Type: Grant
    Filed: May 15, 2012
    Date of Patent: May 12, 2015
    Assignee: Deutsches Krebsforschungszentrum
    Inventors: Gernot Echner, Steffen Seeber, Klaus Schewiola
  • 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: 9020103
    Abstract: A versatile beam scanner for generating a far-field scanned pencil beam, and, alternatively, a far-field pencil beam. An angle selector limits the angular extent of an inner fan beam emitted by a source of penetrating radiation. The source and angle selector may be translated, along a direction parallel to a central axis of a multi-aperture unit, in such a manner as to generate a scanned far-field pencil beam, when rings of apertures are interposed between the source and an inspected target, or, alternatively, a far-field fan beam, when no ring of apertures is interposed.
    Type: Grant
    Filed: February 15, 2013
    Date of Patent: April 28, 2015
    Assignee: American Science and Engineering, Inc.
    Inventor: Lee Grodzins
  • Patent number: 9014339
    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: Grant
    Filed: October 25, 2011
    Date of Patent: April 21, 2015
    Assignee: American Science and Engineering, Inc.
    Inventors: Lee Grodzins, Jeffrey R. Schubert, Omar Al-Kofahi, Peter J. Rothschild
  • Patent number: 9008267
    Abstract: A medical viewing system comprises an X-ray source, a collimator for limiting the X-ray radiation output of the X-ray source and a flat X-ray detector, wherein the collimator is adjustable such that the subsequent X-ray images acquired by the X-ray detector comprise a rectangular shape with variably rounded corners. The acquired X-ray images have a shape, which is in-between a circular shape and a rectangular or square shape. Acquired images with this shape may then be displayed on a display unit, wherein the borders or the images are distant from the borders of the designated screen area of the display unit in order to define a gap on the display. On rotation of an acquired image the rounded corners move towards the borders of the screen and are dimensioned such that they never cross the borders of the display. The used area of the screen 30 is approximately 30% larger than that of a circular image, e.g. taken by means of an image intensifier.
    Type: Grant
    Filed: February 8, 2010
    Date of Patent: April 14, 2015
    Assignee: Koninklijke Philips N.V.
    Inventor: Johannes Hendrik Roberts
  • Publication number: 20150085982
    Abstract: A collimator for a radiotherapy apparatus, comprising a block of radiation-attenuating material having a front face forming the leading edge of the block and at least one main rear face defining the trailing edge of the block, in which the or each rear face is substantially planar in the direction of the depth of the block and non-parallel to the front face. The collimator may form part of a radiotherapy apparatus, and methods of operation of such apparatus are described.
    Type: Application
    Filed: September 24, 2014
    Publication date: March 26, 2015
    Applicant: ELEKTA AB (PUBL)
    Inventors: Virgil WILLCUT, Martin Broad, David Anthony Roberts
  • 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
  • Patent number: 8971497
    Abstract: A contour collimator and an adaptive filter as well as an associated method for adjusting a contour of a ray path of x-ray radiation are provided. The contour collimator and the adaptive filter include fluid impermeable for x-ray radiation and a number of electroactive polymer elements actively connected to the fluid. On application of an electrical voltage to the electroactive polymer elements, an aperture forming the contour in the fluid is formed.
    Type: Grant
    Filed: February 7, 2013
    Date of Patent: March 3, 2015
    Assignee: Siemens Aktiengesellschaft
    Inventor: Sultan Haider
  • Patent number: 8971493
    Abstract: A medical imaging system adaptively acquires anatomical images using a shape adaptive collimator including multiple different portions of X-ray absorbent material automatically adjustable to alter the dimensions of a spatial cross section of an X-ray beam of radiation into a non-rectangular shape, in response to a control signal. The synchronization processor provides a heart rate related synchronization signal derived from a patient cardiac function related parameter. The synchronization signal enables adaptive variation in timing of image acquisition within an individual heart cycle and between successive heart cycles of each individual image frame of multiple sequential image frames. The X-ray image acquisition device uses the shape adaptive collimator for acquiring anatomical images of the region of interest with reduced patient X-ray exposure in response to the synchronization signal. A display processor presents resultant images.
    Type: Grant
    Filed: April 5, 2011
    Date of Patent: March 3, 2015
    Assignee: Siemens Medical Solutions USA, Inc.
    Inventor: Hongxuan Zhang
  • Patent number: 8971498
    Abstract: A contour collimator or an adaptive filter for adjusting a contour of a ray path of x-ray radiation is provided. The apparatus includes a magnetic fluid that is impermeable to x-ray radiation and a number of switchable magnet elements, by which an aperture forming the contour may be formed in the magnetic fluid.
    Type: Grant
    Filed: February 7, 2013
    Date of Patent: March 3, 2015
    Assignee: Siemens Aktiengesellschaft
    Inventor: Sultan Haider
  • Patent number: 8964942
    Abstract: Disclosed is a collimator assembly for a multi-radiation-source medical imaging system (e.g. CT) and a medical imaging system utilizing the collimator. According to some embodiments of the present invention, there is provided a collimator assembly including at least two apertures, which apertures are adjustable substantially synchronously by one or more actuators.
    Type: Grant
    Filed: March 12, 2009
    Date of Patent: February 24, 2015
    Assignee: Arineta Ltd.
    Inventors: Ehud Dafni, David Ruimi
  • Patent number: 8956044
    Abstract: For acquiring an image of a moving region of interest of an object, a corresponding X-ray image acquisition apparatus may include a semitransparent X-ray transmitting device comprised in a collimator which is positioned within a beam of irradiating X-rays thereby at least partly shielding regions on a surface of a detector. After acquiring an X-ray image by detecting X-rays transmitted through the object, the position of the device is automatically adjusted based on image information included in the at least partly shielded region on the detector surface. Taking into account X-ray absorption properties of the device, a virtual image may be calculated, the virtual image corresponding to an X-ray image as if there was no X-ray absorption within the collimator. From this virtual image, the region of interest may be derived, and wedges of said device may be positioned to continuously follow the region of interest.
    Type: Grant
    Filed: April 28, 2010
    Date of Patent: February 17, 2015
    Assignee: Koninklijke Philips N.V.
    Inventor: Erik Hummel
  • Publication number: 20150036801
    Abstract: A radiation generating apparatus 1 comprising a radiation generating unit 2 which emits radiation, and a movable diaphragm unit 3 which is arranged on the radiation generating unit 2, wherein the movable diaphragm unit 3 has restriction blades 18 which adjust a size of a radiation field, a light source 20 which emits visible light, and a reflecting plate 19 which reflects the visible light thereon and transmits the radiation therethrough, and simulatively shows the radiation field in a form of a visible light field by the visible light, wherein the light source 20 can be moved between a first position at which the light source 20 can simulatively show the radiation field by the visible light field, and a second position which is displaced from an irradiation path of the radiation which irradiates the radiation field.
    Type: Application
    Filed: June 11, 2013
    Publication date: February 5, 2015
    Inventors: Yasuo Ohashi, Yoichi Ikarashi, Yoichi Ando
  • Patent number: 8948346
    Abstract: A collimator for adjusting the shape of a region irradiated by radiation and a control method thereof. The collimator includes a plurality of irises to adjust the shape of the irradiation region, a light source outputting light to display the irradiation region, a reflective mirror to adjust a path of light radiated from the light source toward the irradiation region, and an image output unit outputting to the irradiation region a visible image representing the shape of a target object for radiography or a mark indicating the center of the radiation region.
    Type: Grant
    Filed: January 16, 2012
    Date of Patent: February 3, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Min Kook Cho, Seok Mo Ko
  • Patent number: 8942346
    Abstract: Systems and methods for obtaining and displaying a collimated X-ray image are described. The methods can include providing an X-ray device having an X-ray source, a square or rectangular X-ray detector, and a collimator. The collimator can be sized and shaped to collimate an X-ray beam from the X-ray source that exposes a receptor region on the detector. The collimator can allow the X-ray image received by the X-ray detector to have any suitable shape that allows a relatively large view of the image to be displayed and rotated on the display device without changing the shape or size of the image as it rotated. In some instances, the collimator provides the image with superellipse shapes or cornerless shapes having four substantially straight edges with a 90 degree corner missing between at least two edges that run substantially perpendicular to each other. Other embodiments are described.
    Type: Grant
    Filed: March 29, 2012
    Date of Patent: January 27, 2015
    Assignee: General Electric Company
    Inventors: Bret David Nicholson, David Barker
  • Patent number: 8917815
    Abstract: A grid employs dynamic and adjustable grid lines that communicates with a transmitting object and/or a receiving object. The grid lines may be but not limited to liner, crosshatched or pinwheel shaped. The grid may switch between opaque and translucent and the grid lines may target, calibrate to and track an object either transmitting or receiving. The grid may be employed as a filter or a privacy screen on a computer screen for instance. The grid lines are angled to match an angle of a user's position with respect to the grid.
    Type: Grant
    Filed: September 11, 2012
    Date of Patent: December 23, 2014
    Inventor: Zachary A. Miller
  • Patent number: 8884235
    Abstract: A system and method for collimation in diagnostic imaging systems is provided. One collimator includes a plurality of parallel hole segments and a plurality of collimator bores within each of the plurality of parallel hole segments. Additionally, all of the plurality of collimator bores in at least one of the plurality of parallel hole segments have a first pointing direction and all of the plurality of collimator bores in at least one other of the plurality of parallel hole segments have a second pointing direction, wherein the plurality of parallel hole segments are arranged in a fanbeam collimation configuration. Further, the first pointing direction is different than the second pointing direction.
    Type: Grant
    Filed: November 19, 2013
    Date of Patent: November 11, 2014
    Assignee: General Electric Company
    Inventors: Floribertus P. M. Heukensfeldt Jansen, Yaron Hefetz
  • Patent number: 8853636
    Abstract: The primary collimator for a radiotherapy apparatus can be made up of several layers, each comprising several apertures, and each layer being moveable so as to select a specific aperture to build up the primary collimator shape. In this way, the shape of the primary collimator can be tailored and/or the beam filters incorporated into the primary collimator assembly. This saves space in the radiation head whilst also allowing filters to be easily interchanged.
    Type: Grant
    Filed: February 29, 2012
    Date of Patent: October 7, 2014
    Assignee: Elekta AB (Publ)
    Inventor: Clifford William Perkins
  • Publication number: 20140270091
    Abstract: Exemplary embodiments of the present invention are directed to a rotating drum collimator for collimating an energy beam to produce a scanning beam that includes a drum having a substantially cylindrical sidewall with a first helical groove and a second helical groove formed in the cylindrical side wall, and a motor operatively connected to the drum, and configured to cause rotation of the drum about a longitudinal axis of the drum. Each of the first helical groove and the second helical groove comprises a first end portion, a middle portion and a second end portion, and a width of the first end portion and the second end portion of each of the first helical groove and the second helical groove is greater than the middle portion of each of the first helical groove and the second helical groove.
    Type: Application
    Filed: March 6, 2014
    Publication date: September 18, 2014
    Inventors: Lee L. NEMETH, Arthur RADOMSKI
  • Patent number: 8835878
    Abstract: A method of delivering radiation in a session includes delivering radiation towards a patient using a radiation system, wherein the radiation is delivered based at least in part on a physiological phase or a position of the patient, after the radiation is delivered, changing a configuration of the radiation system, wherein the act of changing the configuration is performed independent of at least one motion of the patient, and delivering additional radiation towards the patient after the configuration of the radiation system is changed, wherein the acts of delivering radiation and the act of changing the configuration are performed in response to a processor executing a treatment plan that prescribes a plurality of packages and a transition, the transition prescribing the act of changing the configuration of the radiation system when no radiation is being delivered by the radiation system.
    Type: Grant
    Filed: September 27, 2012
    Date of Patent: September 16, 2014
    Assignee: Varian Medical Systems International AG
    Inventors: Janne Nord, Jarkko Peltola