Filter Patents (Class 378/156)
  • Patent number: 10854348
    Abstract: An X-ray generator includes: a line X-ray source; a multilayer film mirror; and a side-by-side reflecting mirror including two concave mirrors joined together so as to share a join line. A cross section of a reflecting surface of the multilayer film mirror has a parabolic shape, and a focus of the parabolic shape is located at the line X-ray source. Cross sections of reflecting surfaces of the two concave mirrors of the side-by-side reflecting mirror each have a parabolic shape, and each of focuses of the parabolic shapes is located on a side opposite to the multilayer film mirror. An extended line of the join line of the side-by-side reflecting mirror passes through the multilayer film mirror and the line X-ray source as viewed in a plan view.
    Type: Grant
    Filed: February 25, 2019
    Date of Patent: December 1, 2020
    Assignee: RIGAKU CORPORATION
    Inventors: Kazuhiko Omote, Takeshi Osakabe, Tetsuya Ozawa, Licai Jiang, Boris Verman
  • Patent number: 10776534
    Abstract: A LINear particle ACcelerator (LINAC) simulator employs a Monte Carlo-based use of repeated random sampling to produce a simulated result representing use of a particular physical medical-services LINAC with particular corresponding real-world parameters. A browser-based user opportunity permits uploading at least some of those real-world parameters to employ when using the LINAC simulator to produce the simulated result. By one approach the browser-based user opportunity includes, at least in part, an opportunity to upload a file that contains information regarding geometrical positions for the particular physical LINAC. The opportunity to upload the file may, by one approach, presume using a file format that comprises a non-standard file format for the particular physical medical-services LINAC.
    Type: Grant
    Filed: March 31, 2016
    Date of Patent: September 15, 2020
    Assignee: Varian Medical Systems, Inc.
    Inventors: Daren Sawkey, Ioan Antoniu Popescu, Michelle M. Svatos, Corey Zankowski
  • Patent number: 10743833
    Abstract: An image obtainment unit obtains plural radiographic-images generated by arranging plural storable-phosphor-sheets in such a manner that at least portions of the sheets are overlapped with each other in an irradiation direction of radiation, by arranging a marker at a position to be detected by the plural sheets, and by detecting the radiation that has passed through a subject and the marker by each of the plural sheets. A first-information obtainment unit obtains first-information representing a distance between detection surfaces of the plural sheets. A second-information obtainment unit obtains second-information representing a magnification ratio of a second marker image of the marker included in a radiographic-image obtained by a second sheet with respect to a marker image of the marker included in a radiographic-image obtained by a first sheet of the plural sheets. A distance calculation unit calculates, based on the first and the second information, a radiation-source-to-image-surface distance.
    Type: Grant
    Filed: August 23, 2018
    Date of Patent: August 18, 2020
    Assignee: FUJIFILM Corporation
    Inventor: Takahiro Kawamura
  • Patent number: 10716526
    Abstract: An X-ray system, in particular a computed tomography system, for acquiring projection data of an examination subject includes one or more X-ray radiation sources, at least one of the one or more X-ray radiation sources including at least one prefilter, the one or more X-ray radiation sources being configured to generate X-ray radiation including at least two X-ray radiation spectra, the at least one prefilter being configured to at least one of spatially distribute or temporally modify the X-ray radiation, and a one or more photon-counting detectors configured to detect the X-ray radiation passing through the examination subject in an energy-resolved manner according to at least two detection thresholds, and generate projection data based on the detection.
    Type: Grant
    Filed: December 6, 2016
    Date of Patent: July 21, 2020
    Assignee: SIEMENS HEALTHCARE GMBH
    Inventors: Thomas Flohr, Steffen Kappler, Bernhard Krauss, Bernhard Schmidt, Friederike Schoeck, Karl Stierstorfer
  • Patent number: 10714229
    Abstract: In a beam filter assembly, a base filter is employed to modify a beam quality of a radiation beam of a base energy level and a first filter slice is stacked with the base filter to modify a beam quality of a radiation beam of a first energy level higher than the base energy level. In a beam filter positioning device, a base stage carries a base filter and a first stage carries a filter slice. The base stage is provided with a first engagement site and a second engagement site. The first stage is provided with a first engagement site, a second engagement site, and an open port. The first stage and the base stage are each independently movable relative to the beamline. The first stage is engageable with the base stage when at least one of the first and second engagement sites of the first stage is aligned with at least one of the first and second engagement sites of the base stage, and is further movable with the base stage in unison when engaged.
    Type: Grant
    Filed: May 24, 2019
    Date of Patent: July 14, 2020
    Assignee: Varian Medical Systems, Inc.
    Inventors: Christopher Brown, Rachel Rieger, Dusan Baic, Sean Kelley
  • Patent number: 10525286
    Abstract: A sharpening filter for orthovoltage x-ray beams employs a substantially planar filter disk supporting a set of radial symmetric features controlling attenuation of x-ray transmission in concentric circular regions providing increased sharpness of the pencil beams in a compact filter structure that may be tailored to different beam sizes and focus depths.
    Type: Grant
    Filed: May 18, 2017
    Date of Patent: January 7, 2020
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: Jessica Fagerstrom, Edward Bender, Wesley Culberson, Michael Lawless, Benjamin R. M. Palmer, Larry DeWerd
  • Patent number: 10327717
    Abstract: A multiple frames imaging system is disclosed with capability of differential x-ray exposure of different input areas of an image intensifier or other x-ray detector. Collimators are provided to control the amount of radiation in various regions of the image and image processing is provided to provide the display of images of different qualities. Motion methods are provided to move the collimators to produce optimal image frames.
    Type: Grant
    Filed: July 24, 2014
    Date of Patent: June 25, 2019
    Assignee: CONTROLRAD SYSTEMS INC.
    Inventors: Haim Zvi Melman, Liron Melman, Allon Guez
  • Patent number: 10180405
    Abstract: Disclosed is a method for quantitative analysis of heavy metals, particularly lead, arsenic, antimony or cadmium, in a liquid sample. Also disclosed is a method for quantitative analysis of heavy metals, particularly lead, arsenic, antimony or cadmium, in a powdery sample.
    Type: Grant
    Filed: November 4, 2015
    Date of Patent: January 15, 2019
    Assignee: AMOREPACIFIC CORPORATION
    Inventors: So Mi Lee, Boo Min Kim, Na Ri Cha, Hye Sun Yoo, Kyoung Hee Byoun
  • Patent number: 10079003
    Abstract: Methods and systems of displaying an image of an object are described. The displayed image is comprised of at least two parts that are displayed so as to present a unified image of the object. One part of the image is derived using a first temporal filter and the other part of the image is derived using a second temporal filter.
    Type: Grant
    Filed: June 4, 2012
    Date of Patent: September 18, 2018
    Assignee: The Research Foundation for the State University of New York
    Inventors: Stephen Rudin, Daniel R. Bednarek
  • Patent number: 9936926
    Abstract: A system and method of X-ray imaging includes an X-ray emitter that projects X-rays. An X-ray receiver receives X-rays from the X-ray emitter to produce a plurality of projection images. A filter with at least one filter leaf absorbs at least a portion of the X-rays from the X-ray emitter to define a limited field of view within a full field of view, wherein the X-rays are attenuated in at least one attenuated portion of the full field of view. A processor reconstructs a three dimensional image based upon the projection images of the full field of view. The limited field view is located within the reconstructed three dimensional image. At least one corrective parameter is determined from the reconstructed three dimensional image. A three dimensional image is reconstructed based upon the limited field of view and the at least one corrective parameter.
    Type: Grant
    Filed: February 2, 2015
    Date of Patent: April 10, 2018
    Assignee: PaloDEx Group Oy
    Inventor: Esa Kalevi Eronen
  • Patent number: 9901314
    Abstract: A filter assembly for use in a helical computed tomography system having an x-ray source for projecting x-ray beams along a projection axis is presented, the filter assembly including a first filter element for attenuating at least a portion of the x-ray beams, the first filter element constructed as a background-wedge for attenuating x-rays having a large aperture and a second filter element for attenuating at least a portion of the x-ray beams, the second filter element constructed to create a ridge. The second filter element may be rotated with respect to or adjusted in relation with or removed or replaced from the filter assembly to allow for adaptation to different helical pitch values.
    Type: Grant
    Filed: August 5, 2014
    Date of Patent: February 27, 2018
    Assignee: Koninklijke Philips N.V.
    Inventors: Thomas Koehler, Roland Proksa
  • Patent number: 9763632
    Abstract: A radiographic apparatus and method of obtaining images using a radiographic apparatus are disclosed. The radiographic apparatus and method use a filter having different regions for different radiation states. The filter is configured to be moved during different irradiating radiation steps. The radiation from the different steps is detected and may be used to generate an image.
    Type: Grant
    Filed: October 23, 2014
    Date of Patent: September 19, 2017
    Assignee: Shimadzu Corporation
    Inventors: Daisuke Notohara, Junpei Sakaguchi
  • Patent number: 9724053
    Abstract: There is provided an X-ray CT apparatus including: an X-ray source; a wedge which is disposed between the X-ray source and a subject and in which a shield blocking apart of an X ray is formed; a wedge driving unit for moving position of the wedge; and a system control unit controlling the wedge driving unit during a scan execution period to control the position of the wedge.
    Type: Grant
    Filed: September 28, 2015
    Date of Patent: August 8, 2017
    Assignee: Toshiba Medical Systems Corporation
    Inventors: Satoshi Oota, Sakae Kimishima
  • Patent number: 9649076
    Abstract: An X-ray computed tomography (=CT) apparatus (10) has a filter element (2) for attenuating an X-ray beam (1). The filter element (2) has a spatially varying X-ray absorption capability along a cross direction (y) which is perpendicular to both the beam axis (z) of the X-ray beam and to a rotation axis (x) of a gantry. The spatially varying X-ray absorption capability exhibits a maximum absorption along the cross direction (y) at a zero position (y0), wherein X-rays passing through the filter element (2) at the zero position (y0) intersect the rotation axis (x). The CT apparatus allows for further reduction of the radiation dose for an object to be investigated, while simultaneously retaining high image quality.
    Type: Grant
    Filed: September 11, 2015
    Date of Patent: May 16, 2017
    Assignee: Bruker microCT NV
    Inventors: Alexander Sasov, Jeroen Hostens
  • Patent number: 9615812
    Abstract: Calibration methods and related calibration controllers (CC) for calibrating imaging apparatuses (102) such as a 3D computed tomography imager or a 2D x-ray imager. The imaging apparatuses (102) are equipped with a dynamic beam shaper (RF). The dynamic beam shaper (RF) allows adapting the energy profile of a radiation beam (PR) used in the imaging apparatuses (102) to a shape of an object (PAT) to be imaged. A plurality of gain images are acquired in dependence on a shape of the object and the view along which the gain images are acquired or a target gain image is synthesized from a plurality of basis gain images (BGI).
    Type: Grant
    Filed: June 19, 2014
    Date of Patent: April 11, 2017
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Christoph Herrmann, Bernd Menser
  • Patent number: 9599812
    Abstract: Disclosed herein a rotational type foil trap that is capable of avoiding the transmission rate of the EUV light to be lowered even when the EUV light source operates with the high input power and also suppressing the temperature increase of the foil to attain a sufficient life duration. In the rotational type foil trap, one end of each of foils is inserted into each of a plurality of grooves provided on a side face of a center support, and the center support and the each of the foils are fixed together by brazing.
    Type: Grant
    Filed: September 5, 2014
    Date of Patent: March 21, 2017
    Assignee: USHIO DENKI KABUSHIKI KAISHA
    Inventors: Christof Metzmacher, Hermann Giese, Achim Weber, Hironobu Yabuta, Rolf Theo Anton Apetz, Tatsushi Igarashi, Hiroto Sato, Noritaka Ashizawa
  • Patent number: 9592014
    Abstract: An x-ray system comprising an x-ray source, a single essentially round collimator, a camera, a detector and a monitor, means for moving the collimator in a plane generally parallel to the plane of the collimator; and the collimator comprising a central aperture that allows all the radiation to pass through, an outer annulus that reduces the radiation passing through at an amount depending on the material and the thickness of the material and an inner annulus between the central aperture and the outer annulus, with thickness changing as a function of the distance from the center, starting at thickness zero on the side of the central aperture and ending at the thickness of the outer annulus on the side of the outer annulus.
    Type: Grant
    Filed: February 26, 2013
    Date of Patent: March 14, 2017
    Assignee: CONTROLRAD SYSTEMS INC.
    Inventor: Haim Zvi Melman
  • Patent number: 9500600
    Abstract: A radiation image acquisition system of an aspect of the present invention includes a radiation source emitting radiation toward an object, a holding unit holding the object, a wavelength conversion member generating scintillation light in response to incidence of the radiation emitted from the radiation source and transmitted through the object, a first imaging means condensing and imaging scintillation light emitted from an incidence surface of the radiation of the wavelength conversion member, a second imaging means condensing and imaging scintillation light emitted from a surface opposite to the incidence surface of the wavelength conversion member, a holding unit position adjusting means adjusting the position of the holding unit between the radiation source and the wavelength conversion member, and an imaging position adjusting means adjusting the position of the first imaging means.
    Type: Grant
    Filed: June 18, 2013
    Date of Patent: November 22, 2016
    Assignee: HAMAMATSU PHOTONICS K.K.
    Inventors: Mototsugu Sugiyama, Toshiyasu Suyama
  • Patent number: 9439613
    Abstract: A differential phase contrast X-ray imaging system includes an X-ray illumination system, a beam splitter arranged in a radiation path of the X-ray illumination system, and a detection system arranged in a radiation path to detect X-rays after passing through the beam splitter.
    Type: Grant
    Filed: February 6, 2014
    Date of Patent: September 13, 2016
    Assignee: The Johns Hopkins University
    Inventors: Dan Stutman, Michael Finkenthal
  • Patent number: 9357975
    Abstract: Embodiments of methods and apparatus are disclosed for obtaining a phase-contrast digital imaging system and methods for same that can include an x-ray source for radiographic imaging; a beam shaping assembly, an x-ray grating interferometer including a phase grating and an analyzer grating; and an x-ray detector; where the source grating, the phase grating, and the analyzer grating are detuned and a plurality of uncorrelated reference images are obtained for use in imaging processing with the detuned system.
    Type: Grant
    Filed: December 30, 2013
    Date of Patent: June 7, 2016
    Assignee: Carestream Health, Inc.
    Inventors: Pavlo Baturin, Mark E. Shafer
  • Patent number: 9329141
    Abstract: A device and method of the present disclosure provides large field-of-view Talbot-Lau phase contrast CT systems up to very high X-ray energy. The device includes microperiodic gratings tilted at glancing incidence and tiled on a single substrate to provide the large field-of-view phase contrast CT system. The present disclosure is a simple, economical, and accurate method for combining multiple GAIs into a larger FOV system, capable of performing phase-contrast tomography (PC-CT) on large objects. The device and method can be applied to medical X-ray imaging, industrial non-destructive testing, and security screening.
    Type: Grant
    Filed: February 10, 2014
    Date of Patent: May 3, 2016
    Assignee: THE JOHNS HOPKINS UNIVERSITY
    Inventors: Dan Stutman, Michael Finkenthal
  • Patent number: 9179878
    Abstract: A non-rotational CT system according to the present invention comprises: a plurality of X-ray generation units which are radially arranged by being spaced at certain intervals around an inspected object, and in which position correcting sensors are equipped on one side thereof; a plurality of X-ray detection units which are arranged in separated spaces between the X-ray generation units, are provided alternately with the X-ray generation units, and in which position correcting sensors are equipped on one side thereof; a control unit which receives signals from the position correcting sensors equipped in the X-ray generation units and the X-ray detection units, and adjusts the positions of each of the X-ray generation units and the X-ray detection units which face each other to precisely correspond with each other; a data processing unit which stores two-dimensional X-ray images obtained from the X-ray detection units, and applies an image interpolation technique to calculate two-dimensional X-ray images betwe
    Type: Grant
    Filed: January 5, 2012
    Date of Patent: November 10, 2015
    Assignee: Industry Foundation of Chonnam National University
    Inventor: In Su Jeon
  • Patent number: 9135728
    Abstract: A CT system includes a gantry, an x-ray source, a detector, and a grating collimator that includes alternating first and second materials. The system includes a controller configured to emit a first beam of x-rays from a first focal spot and to a first detector pixel, wherein the first beam of x-rays passes along a ray and through one of the first materials of the grating collimator, and subsequently emit a second beam of x-rays from a second focal spot and to the first detector pixel, wherein the second beam of x-rays passes substantially along the ray and through one of the second materials of the grating collimator. The system includes a computer programmed to generate first and second kVp image datasets using data acquired from the first beam and second beams of x-rays, and reconstruct a basis material image of the object.
    Type: Grant
    Filed: April 4, 2012
    Date of Patent: September 15, 2015
    Assignee: General Electric Company
    Inventors: Jiahua Fan, Jiang Hsieh, Naveen Chandra, Suresh Narayanan Narayanan, Dan Xu
  • Patent number: 9131911
    Abstract: A CT scanner comprising a dynamic collimator disposed near an x-ray source and a controller configured to rotate the x-ray source about a subject, wherein imaging data is acquired from a single rotation of the x-ray source, the single rotation being divided into a first half-scan and a second half-scan. The controller is further configured to position the dynamic collimator after acquiring image data from one of the first half-scan and the second half-scan and simultaneous to commencement of acquiring image data from the other of the first half-scan and the second half-scan to obstruct a central portion of an x-ray beam emitted by the x-ray source during one of the first half-scan and the second half-scan. The CT scanner is further configured to reconstruct a CT image using the first set of imaging data and the second set of imaging data.
    Type: Grant
    Filed: March 14, 2012
    Date of Patent: September 15, 2015
    Assignee: General Electric Company
    Inventors: Jiahua Fan, Roy-Arnulf Helge Nilsen
  • Patent number: 9036786
    Abstract: The present invention provides a transmission type X-ray tube and a reflection type X-ray tube. The transmission type X-ray tube comprises a target and a filter material. The target has at least one element which produces X-rays as being excited. The X-rays comprise characteristic K? and K? emission energies of the element for producing images of an object impinged by the X-rays. The filter material through which the X-rays pass has a k-edge absorption energy that is higher than the K? emission energies and is lower than the K? emission energies. The thickness of the filter material is at least 10 microns and less than 3 millimeters.
    Type: Grant
    Filed: June 5, 2012
    Date of Patent: May 19, 2015
    Assignee: NanoRay Biotech Co., Ltd.
    Inventors: Bruce Briant Parsons, Chi-Chieh Cheng
  • Patent number: 9031297
    Abstract: Noise map for CT images have been estimated by generalizing the prior art even-and-odd views approach. One example is to estimate a noise map from images reconstructed from three sets of independent views. A second example is to estimate a noise map from images reconstructed by using two sets of correlated views. A third example is to estimate a noise map from noise map from two images reconstructed from two sets of independent views while the number of views in each set is unequal. Physical phantom data were employed to validate our proposed noise map estimation methods. In comparison to the existing method, our alternative methods yield reasonably accurate noise map estimation.
    Type: Grant
    Filed: February 1, 2013
    Date of Patent: May 12, 2015
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Medical Systems Corporation
    Inventor: Daxin Shi
  • Patent number: 9014338
    Abstract: A method for determining a 4D plan for carrying out intensity-modulated radiation therapy of a target volume subject to irregular periodic motion, with a radiation therapy apparatus is provided. The method includes selecting positions of a radiation source. The number of positions is selected to be identical in all 3D radiation therapy plans. The method also includes selecting a number of respective aperture settings assigned to a respective position of the radiation source to be identical in all 3D radiation therapy plans. A geometrical, temporal, and/or dynamic restriction that restricts a change of the aperture from one aperture setting to another aperture setting is predetermined, and the 3D radiation therapy plans are determined such that the 3D radiation therapy plans fulfill predetermined restrictions for aperture settings in each case.
    Type: Grant
    Filed: January 10, 2013
    Date of Patent: April 21, 2015
    Assignee: Siemens Aktiengesellschaft
    Inventors: Thomas Boettger, Johannes Fieres, Alexander Gemmel, Iwan Kawrakow
  • Publication number: 20150103974
    Abstract: An X-ray source is disposed and a detector is disposed adjacent to the X-ray source. A test specimen holder is disposed between the X-ray source and the detector. A filter is disposed between the X-ray source and the test specimen holder. The filter has a plate-shaped semiconductor, a granular semiconductor, or a combination thereof.
    Type: Application
    Filed: August 8, 2014
    Publication date: April 16, 2015
    Inventors: SANG-YOUNG KIM, KYUNG-SOO RHO, HO-JEONG MOON, HYUCK SHIN, SUN-NYEONG JUNG
  • Patent number: 9001967
    Abstract: Embodiments of methods and apparatus are disclosed for obtaining a phase-contrast digital radiographic imaging system and methods for same that can include an x-ray source for radiographic imaging; a beam shaping assembly including a collimator and a source grating, an x-ray grating interferometer including a phase grating, and an analyzer grating; and an x-ray detector, where a single arrangement of the beam shaping assembly, the x-ray grating interferometer and a position of the detector is configured to provide spectral information (e.g. at least two images obtained at different relative beam energies).
    Type: Grant
    Filed: December 28, 2012
    Date of Patent: April 7, 2015
    Assignee: Carestream Health, Inc.
    Inventors: Pavlo Baturin, Mark E. Shafer
  • Patent number: 8976928
    Abstract: This invention has one object to provide radiographic apparatus with a compensating filter that allows simple and accurate estimation of direct radiation to acquire a radioscopic image or a sectional image of excellent contrast. This invention includes a direct-ray attenuation-rate acquiring section for acquiring a direct-ray attenuation rate from a dose of direct radiation entering into a subject and a dose of direct radiation emitted from the subject. In this invention, a direct-ray attenuation rate is acquired on an assumption that a primary indirect-ray attenuation rate is equal to the direct-ray attenuation rate, the primary indirect-ray attenuation rate being a rate of decreasing a primary indirect-ray generated with the compensating filter that transmits the subject. Such configuration may achieve provision of X-ray apparatus that allows more simple acquisition of a fluoroscopic X-ray image or a sectional image without performing complicated calculations conventionally.
    Type: Grant
    Filed: September 2, 2009
    Date of Patent: March 10, 2015
    Assignee: Shimadzu Corporation
    Inventor: Wataru Takahashi
  • 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: 20140362971
    Abstract: An X-ray distribution adjusting filter, and a CT apparatus and method thereof are provided, in which the X-ray distribution adjusting filter has a hollow inner part, and when rotating, a shape thereof is changed according to rotation angles, such that intensity distribution of X-rays radiating toward a subject may be adjusted.
    Type: Application
    Filed: March 25, 2014
    Publication date: December 11, 2014
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Soo-Yeul LEE, In-Bum LEE, Jeong-Won LEE, Yoon-Seon SONG, Hyung-Wook NOH
  • Patent number: 8891058
    Abstract: The invention relates to an improved EUV generating device having a contamination captor for “catching” contamination and/or debris caused by corrosion or otherwise unwanted reactions of the tin bath.
    Type: Grant
    Filed: July 10, 2009
    Date of Patent: November 18, 2014
    Assignee: Koninklijke Philips N.V.
    Inventors: Christof Metzmacher, Achim Weber
  • Publication number: 20140301533
    Abstract: In one embodiment, a protective shield for a spectrometer is provided. The shield includes a body configured to substantially protect a front of the spectrometer, the body including an aperture that includes a protective mesh. The protective mesh includes a high-strength, low-Z material, such as an arrangement of carbon fibers. A method of fabrication, a spectrometer and a method of using the spectrometer are disclosed.
    Type: Application
    Filed: December 23, 2013
    Publication date: October 9, 2014
    Inventors: James L. Failla, JR., David A. Clifford, Wayne Allen Minter
  • Publication number: 20140294139
    Abstract: The present invention pertains to a system and method for adaptive X-ray filtration comprising a volume of X-ray attenuating material with a central less attenuating three-dimensional region. The volume of X-ray attenuating material can be positioned within 10 cm from an X-ray source and rotated around an internal axis of rotation. The volume of X-ray attenuating material can be symmetric around the internal axis while the central less attenuating region can be asymmetric around the internal axis. Rotating the volume by a predetermined angle around the internal axis can change the amount of attenuation of an X-ray beam through the filter. The volume can be rotated by the same predetermined angle as an imaging subject or X-ray source and detector are rotated during X-ray image acquisition.
    Type: Application
    Filed: June 28, 2013
    Publication date: October 2, 2014
    Applicant: TRIPLE RING TECHNOLOGIES, INC.
    Inventor: TOBIAS FUNK
  • Patent number: 8798720
    Abstract: The invention relates to a method and a device for determining the position of a part of a medical instrument with an x-ray sensitive sensor in a plane of an x-ray image using an x-ray facility having an x-ray beam source and a device, which is assigned to the beam source and influences the x-ray radiation emitted by the x-ray beam source, wherein a spatial region, in which the medical instrument is located, is scanned with x-ray radiation and at the same time x-ray radiation is detected with the x-ray-sensitive sensor with the device for influencing the x-ray radiation rotating at constant speed, the rotation being synchronized to the receipt of signals based on x-ray radiation with the x-ray-sensitive sensor and with the position of the part of the medical instrument in the plane of an x-ray image being determined based on the x-ray radiation detected with the x-ray-sensitive sensor.
    Type: Grant
    Filed: April 16, 2008
    Date of Patent: August 5, 2014
    Assignee: Siemens Aktiengesellschaft
    Inventors: Ulrich Bill, Jan Boese, James Williams
  • Patent number: 8767915
    Abstract: A differential phase contrast X-ray imaging system includes an X-ray illumination system, a beam splitter arranged in an optical path of the X-ray illumination system, and a detection system arranged in an optical path to detect X-rays after passing through the beam splitter.
    Type: Grant
    Filed: June 11, 2012
    Date of Patent: July 1, 2014
    Assignee: The Johns Hopkins University
    Inventors: Daniel Stutman, Michael Finkenthal
  • Patent number: 8761346
    Abstract: A multilayer optic device having an input face and an output face is provided. The optic device includes a high-index material layer having a first real refractive index 1??1 and a first absorption coefficient ?1, wherein the core comprises a first surface and a second surface, a low-index material layer having a second real refractive index 1??2 and a second absorption coefficient ?2, and a grading zone disposed between the high-index material layer and low-index material layer, the grading zone comprising a grading layer having a third real refractive index 1??3 and a third absorption coefficient ?3, such that 1??11>1??3>1??2, where at least a portion of one or more of the high-index material layer, the grading zone and the low-index layer comprises one or more corrugations along a first direction.
    Type: Grant
    Filed: July 29, 2011
    Date of Patent: June 24, 2014
    Assignee: General Electric Company
    Inventor: Susanne Madeline Lee
  • Patent number: 8761347
    Abstract: A system includes a beam filter positioning device including a plate configured to support one or more beam filters, and one or more axes operable to move the plate relative to a beam line. A control mechanism is coupled to the one or more axes for controlling the movement of the axes and configured to automatically adjust the position of at least one of the one or more beam filters relative to the beam line.
    Type: Grant
    Filed: December 13, 2011
    Date of Patent: June 24, 2014
    Assignee: Varian Medical Systems, Inc.
    Inventors: Christopher E. Brown, Steven W. Prince, William A. Strachan, Stanley Mansfield, Stephen Mohr
  • Publication number: 20140112441
    Abstract: A method for selecting a radiation shaping filter is disclosed, which modifies the spatial distribution of the intensity and/or the spectrum of x-rays of an x-ray source of an imaging system. In an embodiment, anatomical measurement data of an object under examination is recorded, from which with the aid of the imaging system image data is creatable. The radiation shaping filter is selected automatically on the basis of the recorded anatomical measurement data of the object under examination. An imaging system, in which a radiation shaping filter is selected, is further disclosed.
    Type: Application
    Filed: September 11, 2013
    Publication date: April 24, 2014
    Applicants: KLINIKUM DER UNIVERSITATE MUNCHEN, SIEMENS AKTIENGESELLSCHAFT
    Inventors: Hans-Christoph BECKER, Thomas FLOHR, Bernhard SCHMIDT
  • Publication number: 20140105361
    Abstract: The present invention relates to filtering of X-ray radiation generated at multiple focal spots. For the generation of multiple-energy X-ray radiation, an X-ray tube (10) for generating multiple-energy X-ray radiation is provided that comprises an anode (12) and a filter unit (14). The anode comprises at least a first (16) and a second focal spot position (18), which are offset from each other in an offset direction (20) transverse to an X-ray radiation projection direction.
    Type: Application
    Filed: May 30, 2012
    Publication date: April 17, 2014
    Applicant: KONINKLIJKE PHILIPS N.V.
    Inventors: Gereon Vogtmeier, Rainer Pietig, Christoph Loef, Martin Kimutai Duerr, Gerald James Carlson
  • Patent number: 8649483
    Abstract: A method is described for producing a grating, in particular an absorption grating, having a grating constant of less than 100 ?m, by using a solution of superparamagnetic colloidal nanocrystal clusters (CNCs), a solvent liquid and a photocurable resin, with the following steps: —alignment of the CNCs in the solution by an external magnetic field, —exposure of the solution, so that the resin is cured and grating structures of an intended grating constant are formed, and —removal of the magnetic field.
    Type: Grant
    Filed: July 18, 2011
    Date of Patent: February 11, 2014
    Assignee: Siemens Aktiengesellschaft
    Inventor: Martin Hoheisel
  • Publication number: 20130343516
    Abstract: A method and an apparatus for filtering radio-frequency electromagnetic beams, in particular x-rays, include a fluid container containing a ferrofluid which at least partially absorbs the electromagnetic beams. A distribution of the ferrofluid within the fluid container can be varied by using an applied magnetic gradient field. An irradiation apparatus and a device for irradiating an object are also provided.
    Type: Application
    Filed: June 26, 2013
    Publication date: December 26, 2013
    Inventors: OLIVER HAYDEN, MANFRED RUEHRIG, FRANK SAUER, REINER FRANZ SCHULZ, SANDRO FRANCESCO TEDDE
  • Patent number: 8588362
    Abstract: A CT imaging system includes a multi-position x-ray filter having a filter element configured to spectrally filter a beam of x-rays and a magnet structure configured to selectively generate a magnetic field to cause the filter element to move between filter and non-filter positions. A CT imaging system computer causes an x-ray source to emit x-rays at each of a first kVp and a second kVp and control the multi-position x-ray filter to position the filter element in the non-filter position during emission of the x-rays at the first kVp and in the filter position during emission of the x-rays at the second kVp. The computer causes current to be provided to the magnet structure so as to generate a magnetic field configured to move the filter element to the filter and non-filter positions at high frequency, into and out of a path of the beam of x-rays.
    Type: Grant
    Filed: April 26, 2012
    Date of Patent: November 19, 2013
    Assignee: General Electric Company
    Inventor: Carey Shawn Rogers
  • Publication number: 20130287164
    Abstract: A CT imaging system includes a multi-position x-ray filter having a filter element configured to spectrally filter a beam of x-rays and a magnet structure configured to selectively generate a magnetic field to cause the filter element to move between filter and non-filter positions. A CT imaging system computer causes an x-ray source to emit x-rays at each of a first kVp and a second kVp and control the multi-position x-ray filter to position the filter element in the non-filter position during emission of the x-rays at the first kVp and in the filter position during emission of the x-rays at the second kVp. The computer causes current to be provided to the magnet structure so as to generate a magnetic field configured to move the filter element to the filter and non-filter positions at high frequency, into and out of a path of the beam of x-rays.
    Type: Application
    Filed: April 26, 2012
    Publication date: October 31, 2013
    Inventor: Carey Shawn Rogers
  • Patent number: 8559746
    Abstract: System, method, and apparatus for smoothing of edges in images to remove irregularities are disclosed. In one aspect of the present disclosure, a method of image processing includes, identifying an edge in an image having an associated set of edge characteristics, determining the associated set of edge characteristics, and applying a low pass filter to a pixel of the edge based on the associated set of edge characteristics to generate a second image based on the image, wherein the edge in the image is smoothed in the second image. The method further includes generating a third image which is a blend of the original image and the second (edge-smoothed) image based on the associated set of edge characteristics.
    Type: Grant
    Filed: September 4, 2008
    Date of Patent: October 15, 2013
    Assignee: Silicon Image, Inc.
    Inventor: Dale Richard Adams
  • Publication number: 20130195254
    Abstract: An X-ray control unit using a monocrystalline material which controls only a specific wavelength of X-rays, by using the monocrystalline material as a filter. The X-ray control unit includes a light source configured to generate X-rays, an X-ray control filter formed of a monocrystalline material having grown in one direction and configured to filter the X-rays generated by the light source to reflect and transmit characteristic X-rays, and an adjustor configured to adjust the light source and the X-ray control filter to arbitrary angles. Since X-rays having a specific wavelength can be selectively used by using a filter, the X-rays can be easily controlled and their intensity can be easily regulated. A characteristic line of the X-rays can be controlled and their intensity can be regulated without directly controlling an X-ray source.
    Type: Application
    Filed: June 8, 2012
    Publication date: August 1, 2013
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Sungyoul CHOI, Yoon Ho Song, Jin Woo Jeong, Jun Tae Kang, Jae-woo Kim
  • Publication number: 20130182820
    Abstract: An imaging system including a source (310) having a focal spot (406) that emits a radiation beam that traverses an examination region, a radiation sensitive detector array (316) having a plurality of pixels that detects radiation traversing the examination region and generates projection data indicative of the detected radiation, and a filter (314), disposed between the source and the examination region, that filters peripheral regions of the emitted radiation, wherein the filter includes two separate and moveable regions (402), each region having a substantially same thickness and constant homogeneity.
    Type: Application
    Filed: September 28, 2011
    Publication date: July 18, 2013
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.
    Inventor: Roland Proksa
  • Patent number: 8488744
    Abstract: An X-ray measurement apparatus includes an X-ray source configured to emit an X-ray to irradiate a specimen with the X-ray, a collimator configured to shape a beam of the X-ray emitted from the X-ray source into a sliced fan-shaped beam x-ray, a flux shield configured to block a part of a flux of the fan-shaped beam X-ray so as to suppress beam hardening while adjusting an energy intensity distribution of the flux, the flux shield being placed between the collimator and the specimen, and an X-ray detector configured to detect a dose transmitted through the specimen.
    Type: Grant
    Filed: November 26, 2010
    Date of Patent: July 16, 2013
    Assignee: Yokogawa Electric Corporation
    Inventor: Yasushi Ichizawa
  • Patent number: 8477903
    Abstract: A method of validating a compensator for use in a radiation therapy machine to treat a cancer patient involves determining a radiation treatment plan based on a compensator description file that includes data representative of an actual machined surface of the compensator. The plan includes operating parameters of the radiation therapy machine, and this plan is compared against actual radiation measurements taken during a non-patient test of the radiation therapy machine with the compensator mounted to the machine. If the comparison results in a match, the compensator is validated for use in the radiation therapy machine to treat the cancer patient.
    Type: Grant
    Filed: March 31, 2011
    Date of Patent: July 2, 2013
    Assignee: Axellis Ventures Ltd
    Inventors: John M. Wright, William Tomer, Michael J. Hudson