Plural Sources Patents (Class 378/9)
  • Patent number: 8094773
    Abstract: A method is provided for quickly and simply generating a three-dimensional tomographic x-ray imaging. Tomosynthetic projection images are recorded from different recording angles along a tomosynthetic scanning path and three-dimensional image data is reconstructed from the tomosynthetic projection images. The tomosynthetic projection images are recorded by a tomosynthetic x-ray device with a plurality of x-ray sources arranged on a holder at a distance from one another. Each projection image is recorded by a different x-ray source being fixed in one place during recording the tomosynthetic projection images.
    Type: Grant
    Filed: September 27, 2010
    Date of Patent: January 10, 2012
    Assignee: Siemens Aktiengesellschaft
    Inventors: Jan Boese, Frank Dennerlein, Benno Heigl, Holger Kunze, Michael Maschke
  • Publication number: 20110311020
    Abstract: An image diagnosis apparatus and method may emit radiation to a target object, may compress the target object in response to the emitted radiation, and may collect a plurality of images with respect to the compressed target object in response to the emitted radiation. An elastic image with respect to the target object may be generated based on the plurality of collected images.
    Type: Application
    Filed: May 12, 2011
    Publication date: December 22, 2011
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Jong Ha Lee, Dong Goo Kang, Sung Su Kim, Young Hun Sung, Seok Min Han, Kwang Eun Jang
  • Publication number: 20110311019
    Abstract: A tomographic apparatus (10) includes at least two x-ray sources (16) that are concurrently driven with different switching patterns to generate uniquely encoded radiation. The tomographic apparatus (10) further includes at least two detectors (20) that each detect primary radiation emitted by its corresponding one of the at least two x-ray sources (16) and cross scatter radiation from at least one of the other at least two x-ray sources (16). Each of the at least two detectors (20) produces an aggregate signal representative of the detected primary and cross scatter radiation. The tomographic apparatus (10) further includes a decoupler (30) which, based on the different switching patterns, identifies at least one signal corresponding to at least one of the at least two x-ray sources (16) within the aggregate signal and associates the identified signal with its corresponding x-ray source (16).
    Type: Application
    Filed: June 13, 2007
    Publication date: December 22, 2011
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N. V.
    Inventors: Carolina M. Ribbing, Gereon Vogtmeier, Roland Proksa
  • Patent number: 8081732
    Abstract: A multi-emitter computed tomography scanner is disclosed, including a plurality of x-ray emitter/detector arrangement pairs arranged offset at an angle to one another. In at least one embodiment, the detector arrangements of the pairs are designed to be energy selective.
    Type: Grant
    Filed: April 5, 2010
    Date of Patent: December 20, 2011
    Assignee: Siemens Aktiengesellschaft
    Inventors: Herbert Bruder, Rainer Raupach, Karl Stierstorfer
  • Publication number: 20110299653
    Abstract: Imaging systems including a multiple focal spot x-ray source adapted to irradiate an object with a series of angularly displaced x-ray beams, one at a time, without substantial rotation or translation of the multiple focal spot x-ray source are provided. Such systems also includes a detector adapted to receive at least a fraction of the angularly displaced x-ray beams after being attenuated by the object to produce at least two x-ray projection images of the object. The imaging systems also include a processor adapted to shift and add the at least two x-ray projection images to bring at least two planes of the object into focus, one at a time.
    Type: Application
    Filed: December 15, 2010
    Publication date: December 8, 2011
    Applicant: General Electric Company
    Inventors: Debasish Mishra, William Robert Ross, Forrest Frank Hopkins, Kristopher John Frutschy, Clifford Bueno
  • Patent number: 8064568
    Abstract: In a radioscopic method and device to generate projections of the inside of an examination subject that is located in an examination space of a data acquisition unit, a number of ray beams are generated that are directed toward the examination space and that each exhibit a fan angle in a rotation plane. The number of ray beams are rotated in the rotation plane in a rotation direction the examination space, while the fan angle is varied during the rotation.
    Type: Grant
    Filed: April 7, 2010
    Date of Patent: November 22, 2011
    Assignee: Siemens Aktiengesellschaft
    Inventor: Thomas Von Der Haar
  • Publication number: 20110282181
    Abstract: The present invention relates to the field of medical imaging. More particularly, embodiments of the invention relate to methods, systems, and devices for imaging, including for tomography-based applications. Embodiments of the invention include, for example, a computed tomography based imaging system comprising: (a) at least one wide-beam gray-scale imaging chain capable of performing a global scan of an object and acquiring projection data relating to the object; (b) at least one narrow-beam true-color imaging chain capable of performing a spectral interior scan of a region of interest (ROI) of and acquiring projection data relating to the object; (c) a processing module operably configured for: (1) receiving the projection data; (2) reconstructing the ROI into an image by analyzing the data with a color interior tomography algorithm, aided by an individualized gray-scale reconstruction of an entire field of view (FOV), including the ROI; and (d) a processor for executing the processing module.
    Type: Application
    Filed: November 12, 2010
    Publication date: November 17, 2011
    Inventors: Ge WANG, Yong Xu, Alexander Cong, Haiou Shen, Wenxiang Cong, Lin Yang, Yang Lu
  • Publication number: 20110280367
    Abstract: The present invention relates to an examination apparatus and a corresponding method to realize a Spectral x-ray imaging device through inverse-geometry CT.
    Type: Application
    Filed: December 10, 2009
    Publication date: November 17, 2011
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.
    Inventors: Christian Baeumer, Gereon Vogtmeier
  • Publication number: 20110274238
    Abstract: A computed tomography system is provided for allowing it to be deployed more effectively. The computed tomography system features an annular CT gantry with a central opening, a recording system that can be rotated within the gantry. The recording system has an x-ray source and an x-ray detector apparatus. It is possible to remove a part of the ring of the CT gantry from the ring at least partially so that there is a break in the ring, through which an examination object can be moved into the central opening. The computed tomography system is for phase contrast x-ray imaging.
    Type: Application
    Filed: May 9, 2011
    Publication date: November 10, 2011
    Inventor: Michael MASCHKE
  • Publication number: 20110268341
    Abstract: A method for reconstruction of an actual three-dimensional image dataset of an object during a monitoring process is proposed. Two-dimensional. X-ray projection images which correspond to a recording geometry are continuously recorded from different projection angles. The three-dimensional image dataset are reconstructed from a first number of these projection images, especially by a back projection method. The proportion of the oldest projection image contained in the current three-dimensional image dataset is removed from the three-dimensional image dataset and the proportion of the actual projection image is inserted in the three-dimensional image dataset after each recording of the actual projection image.
    Type: Application
    Filed: April 26, 2011
    Publication date: November 3, 2011
    Inventors: Jan Boese, Frank Dennerlein
  • Publication number: 20110261924
    Abstract: The invention relates to a rotational X-ray device (100), for example a CT scanner, for generating phase contrast images of an object (1). In a particular embodiment of the device (100), a plurality of X-ray sources (11), an X-ray detector (30), and an analyzer grating (G2) are attached to a rotatable gantry (20), while a ring-shaped phase grating (G1 is stationary. The X-ray sources are disposed such that X-rays first pass an object under study before traversing the phase grating (G1) and subsequently the analyzer grating (G2). This is achieved by either shifting the X-ray sources axially with respect to the ring-shaped phase grating (G1) or by disposing the X-ray sources in the interior of the ring. Moreover, the phase grating (G1) and the analyzer (G2) shall have spatially varying relative phase (and/or periodicity), for example realized by line grids that are tilted with respect to each other.
    Type: Application
    Filed: March 13, 2009
    Publication date: October 27, 2011
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.
    Inventor: Joerg Bredno
  • Patent number: 8031829
    Abstract: A method for analytically reconstructing a multi-axial computed tomography (CT) dataset, acquired using one or more longitudinally-offset x-ray beams emitted from multiple x-ray sources is provided. The method comprises acquiring one or more CT axial projection datasets, wherein the CT axial projection datasets are acquired using less than a full scan of data. The method further comprises reconstructing the CT axial projection datasets to generate a reconstructed image volume. The reconstruction comprises back projecting one or more voxels comprising the multi-axial CT dataset, along one or more projection views, based upon a cone-angle weight determined for the voxels, wherein the cone-angle weight for the voxels is determined along a longitudinal direction.
    Type: Grant
    Filed: October 26, 2007
    Date of Patent: October 4, 2011
    Assignee: General Electric Company
    Inventors: Zhye Yin, Bruno Kristiaan Bernard DeMan, Jed Douglas Pack
  • Patent number: 8031831
    Abstract: To prevent patients from being overexposed or underexposed, it has been attempted to modulate either voltage or current in conventional single energy CT systems. The voltage modulation causes incompatibility in projection data among the views while the current modulation reduces only noise. To solve these and other problems, dual energy CT is combined with voltage modulation techniques to improve the dosage efficiency. Furthermore, dual energy CT has been combined with both voltage modulation and current modulation to optimize the dosage efficiency in order to minimize radiation to a patient without sacrificing the reconstructed image quality.
    Type: Grant
    Filed: May 28, 2009
    Date of Patent: October 4, 2011
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Medical Systems Corporation
    Inventor: Yu Zou
  • Patent number: 8027428
    Abstract: A CT system is disclosed for phase-contrast and absorption imaging with a plurality of emitter-detector systems. In at least one embodiment, there are at least two emitter-detector systems and the at least two emitter-detector systems have a different distance between radiation focus and detector and there is a computational element for calculating phase-contrast images on the basis of the solution to the intensity transport equation. Moreover, at least one embodiment of the invention relates to a method for phase-contrast and absorption imaging using such a CT system by comparing attenuation images recorded at different distances of a detector from a multiplicity of projection angles by solving the intensity transport equation and reconstruction or comparison of two tomographic and three-dimensional image data records, reconstructed from projections, which were recorded at different distances.
    Type: Grant
    Filed: April 28, 2010
    Date of Patent: September 27, 2011
    Assignee: Siemens Aktiengesellschaft
    Inventor: Eckhard Hempel
  • Publication number: 20110228899
    Abstract: The present invention pertains to an apparatus and method for inverse geometry volume computed tomography medical imaging of a human patient. A plurality of stationary x-ray sources for producing x-ray radiation are used. A rotating collimator located between the plurality of x-ray sources and the human patient is also used. A rotating detector can also be used.
    Type: Application
    Filed: March 18, 2011
    Publication date: September 22, 2011
    Inventors: Tobias Funk, Joseph Anthony Heanue, Waldo Stephen Hinshaw, Edward Gerald Solomon, Brian Patrick Wilfley
  • Publication number: 20110228898
    Abstract: The present invention pertains to an apparatus and method for inverse geometry volume computed tomography medical imaging of a human patient. A plurality of x-ray sources for producing x-ray radiation are used. The gaps between the x-ray sources is less than 20 cm. A collimator located between the plurality of x-ray sources and the human patient is also used. A detector is also used.
    Type: Application
    Filed: March 18, 2011
    Publication date: September 22, 2011
    Inventors: Norbert Joseph Pelc, Tobias Funk, Joseph Anthony Heanue, Waldo Stephen Hinshaw, Edward Gerald Solomon, Brian Patrick Wilfley
  • Publication number: 20110211666
    Abstract: A CT scanning system may include a multi-pixel x-ray source, and a detector array. The multi-pixel x-ray source may have a plurality of pixels that are disposed along a z-axis, and that are sequentially activated so as to controllably emit x-rays in response to incident electrons. The detector array may have one or more rows of x-ray detectors that detect the x-rays that are emitted from the pixels and have traversed an object, and generate data for CT image reconstruction system. In third generation CT scanning systems, the number of detector rows may be reduced. Multi-pixel x-ray source implementation of saddle curve geometry may render a single rotation single organ scan feasible. Using a multi-pixel x-ray source in stationary CT scanning systems may allow x-ray beam design with a minimal coverage to satisfy mathematical requirements for reconstruction.
    Type: Application
    Filed: September 10, 2008
    Publication date: September 1, 2011
    Applicant: ANALOGIC CORPORATION
    Inventors: Zhengrong Ying, Sergey Simanovsky, Ram Naidu, Sorin Marcovici
  • Publication number: 20110211665
    Abstract: Systems, methods, and related computer program products for image-guided radiation treatment (IGRT) are described. Provided according to one preferred embodiment is an IGRT apparatus including a barrel-style rotatable gantry structure that provides high mechanical stability, versatility in radiation delivery, and versatility in target tracking. Methods for treatment radiation delivery using the IGRT apparatus include conical non-coplanar rotational arc therapy and cono-helical non-coplanar rotational arc therapy. A radiation treatment head (MV source) and a treatment guidance imaging system including a kV imaging source are mounted to and rotatable with a common barrel-style rotatable gantry structure, or alternatively the MV and kV sources are mounted to separate barrel-style rotatable gantry structures independently rotatable around a common axis of rotation.
    Type: Application
    Filed: February 23, 2011
    Publication date: September 1, 2011
    Applicant: ACCURAY INCORPORATED
    Inventors: Calvin R. Maurer, JR., Euan S. Thomson
  • Publication number: 20110194745
    Abstract: A method for tracking position of a feature in a subject is provided comprising operating a CT scanner to generate and display CT images of a volume within the subject and operating the CT scanner to generate projection X-Ray images of the volume. The X-Ray images are responsive to X-Ray emitted by two X-Ray sources displaced from each other. The method further comprises generating and displaying stereoscopic images from said projection X-Ray images, wherein the stereoscopic images are spatially registered to the CT images.
    Type: Application
    Filed: April 14, 2011
    Publication date: August 11, 2011
    Applicant: ARINETA LTD.
    Inventors: Ehud DAFNI, Rafael Shmuel Brada
  • Publication number: 20110188724
    Abstract: A method is disclosed for reconstructing image data of an examination object from measurement data of a computed tomography system, the examination object having been irradiated simultaneously by a number of X-ray sources while the measurement data was being acquired so that different projections of the examination object associated with the number of X-ray sources were acquired simultaneously for each detector element. In at least one embodiment, different iteration images of the examination object are determined one after the other from the measurement data by way of an iterative algorithm, a computation operation being employed with the iterative algorithm, which is applied to the iteration images and takes the presence of the number of X-ray sources into account.
    Type: Application
    Filed: February 3, 2011
    Publication date: August 4, 2011
    Applicant: Siemens Aktiengesellschaft
    Inventors: Herbert Bruder, Karl Stierstorfer
  • Patent number: 7991114
    Abstract: An X-ray imaging apparatus includes a multi X-ray source which includes a plurality of X-ray focuses to generate X-rays by irradiating X-ray targets with electron beams, a detector which detects X-rays which have been emitted from the multi X-ray source and have reached a detection surface, and a moving mechanism for moving the multi X-ray source within a plane facing the detection surface. The X-ray imaging apparatus acquires a plurality of X-ray detection signals from the detector by causing the multi X-ray source to perform X-ray irradiation while shifting the positions of a plurality of X-ray focuses which the detector has relative to the detection surface by moving the multi X-ray source using the moving mechanism. The apparatus then generates an X-ray projection image based on the plurality of X-ray detection signals acquired by the detector.
    Type: Grant
    Filed: April 20, 2010
    Date of Patent: August 2, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masahiko Okunuki, Makoto Sato, Osamu Tsujii, Takashi Ogura, Hisashi Namba
  • Publication number: 20110182402
    Abstract: A radiation system includes a first radiation source and a first detector positioned opposite to each other configured to image a body portion, and a second radiation source and a second detector positioned opposite to each other configured to image a region of interest in the body portion. The first radiation source has a first spot size and the first detector has a first pixel size. The second radiation source has a second spot size and the second detector has a second pixel size. The first spot size of the first radiation source may be different from the second spot size of the second radiation source, and/or the first pixel size of the first detector may be different from the second pixel size of the second detector.
    Type: Application
    Filed: January 28, 2010
    Publication date: July 28, 2011
    Applicant: Varian Medical Systems, Inc.
    Inventor: Larry D. Partain
  • Publication number: 20110176655
    Abstract: A system and method for tomosynthesis, the method including emitting a respective imaging x-ray from each of a plurality of imaging x-ray sources disposed in a fixed relation with respect to one another, acquiring x-ray absorption projections of an object, each of the x-ray absorption projections associated with an imaging x-ray emitted by a respective one of the plurality of imaging x-ray sources, and performing digital tomosynthesis using the x-ray absorption projections to generate a cross-sectional image of the object.
    Type: Application
    Filed: April 6, 2011
    Publication date: July 21, 2011
    Applicant: SIEMENS MEDICAL SOLUTIONS USA, INC.
    Inventors: Ali Bani Hashemi, Jonathan S. Maltz
  • Patent number: 7976218
    Abstract: A modular x-ray source for an imaging system includes a structure forming a cavity and having a first wall and a second wall, at least one target positioned on the first wall within the cavity and configured to receive a first electron beam at a first spot position and a second electron beam at a second spot position, and a shielding material positioned on the second wall.
    Type: Grant
    Filed: October 16, 2008
    Date of Patent: July 12, 2011
    Assignee: General Electric Company
    Inventors: Mark E. Vermilyea, Yang Cao, Louis Paul Inzinna, Dennis M. Jacobs, Xi Zhang, Yun Zou
  • Publication number: 20110150174
    Abstract: An imaging system includes a rotatable gantry having an opening therein to receive a subject to be scanned and configured to rotate about a central axis in a rotation direction. The imaging system also includes a first x-ray source coupled to the rotatable gantry at a first position, wherein the first position is offset from the central axis of the rotatable gantry by a first distance. Further, the imaging system includes a second x-ray source coupled to the rotatable gantry at a second position, wherein the second position is offset from the central axis of the rotatable gantry by a second distance, wherein the second position is offset from the first position in a direction coincident with the rotation direction, and wherein the second position is offset from the first position in a direction parallel to the central axis.
    Type: Application
    Filed: December 21, 2009
    Publication date: June 23, 2011
    Inventors: Paavana Sainath, Peter Crandall, Abdelaziz Ikhlef, Chad Smith, Ron Kent Hockersmith, Baojun Li
  • Patent number: 7961838
    Abstract: Systems and methods include coordinated (KV) and megaelectronvolt (MV) computerized tomography (CT) imaging. KV and MV data are combined using a normalization process in order to generate CT images. The resulting CT images can include an improved signal to noise ratio in comparison to CT images generated using either KV or MV imaging alone. The coordinated KV and MV imaging process may be accomplished in significantly less time than using KV or MV imaging alone. This time savings has advantages in treatment verification. The MV projections are optionally generated using MV x-rays configured for x-ray treatment. In these cases the combined projections will reflect the treatment volume.
    Type: Grant
    Filed: October 10, 2008
    Date of Patent: June 14, 2011
    Assignee: Varian Medical Systems, Inc.
    Inventor: Fang-Fang Yin
  • Publication number: 20110135052
    Abstract: An imaging system includes at least one radiation generating component (210) that alternately emits different radiation that traverse an examination region and a common detector (214) that detects radiation that traverses the examination region and generates a signal indicative thereof. Pulse generating circuitry (304) generates a pulse train, including a plurality of pulses, with a frequency indicative of the signal for the at least one radiation generating component (210) for a sampling interval. Processing electronics (220) determine an approximation of the signal for one of the at least one radiation generating components (210) for the sampling interval based on a number of pulses in the pulse train for the sampling interval and charge of the pulses in the pulse train.
    Type: Application
    Filed: July 14, 2009
    Publication date: June 9, 2011
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.
    Inventor: Roland Proksa
  • Patent number: 7957502
    Abstract: A method for scaling a scattered ray intensity distribution in a multi bulbs X-ray CT apparatus configured to irradiate a subject with X-rays from a plurality of X-ray generation sections, respectively and configure a cross-sectional image of the subject by detecting the X-rays passing through the subject. A first difference is achieved, the first difference being the difference between a real data of X-ray intensity achieved by passing of X-rays through the subject, the X-rays being radiated from the plurality of the X-ray generation sections, respectively and an opposed data of X-ray intensity achieved by passing of these X-rays through the subject at the same position in an opposite direction, a second difference between scattered ray intensity included in the real data and scattered ray intensity included in the opposed data being achieved.
    Type: Grant
    Filed: October 1, 2008
    Date of Patent: June 7, 2011
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Medical Systems Corporation
    Inventors: Takahiro Manabe, Naruomi Akino
  • Publication number: 20110129060
    Abstract: A radio tomography imaging method according to the present invention includes: calculating a conversion function based on a transmission image picked up by using a radiation emitted from a first radiation source and a transmission image picked up by using a radiation emitted from a second radiation source; wherein a position of the second radiation source when the radiation has been emitted coincides with a position of the first radiation source when the radiation has been emitted, and one of the first and second radiation sources emits the radiation when the other emits the radiation, picking up a plurality of first reconfiguration transmission images and a plurality of second reconfiguration transmission images by using a plurality of first reconfiguration radiations and a plurality of second reconfiguration radiations simultaneously emitted from the first radiation source and the second radiation source; correcting the plurality of first reconfiguration transmission images and the plurality of second recon
    Type: Application
    Filed: December 22, 2008
    Publication date: June 2, 2011
    Inventors: Takanobu Handa, Shuji Kaneko
  • Patent number: 7949101
    Abstract: The present invention is directed toward an X-ray scanner that has an electron source and an anode. The anode has a target surface with a series of material areas spaced along it in a scanning direction. The material areas are formed from different materials. The electron source is arranged to direct electrons at a series of target areas of the target surface, in a predetermined order, so as to generate X-ray beams having different energy spectra.
    Type: Grant
    Filed: June 16, 2009
    Date of Patent: May 24, 2011
    Assignee: Rapiscan Systems, Inc.
    Inventor: Edward James Morton
  • Patent number: 7949089
    Abstract: A CT scanner for scanning a subject is provided, the scanner comprising: a gantry capable of rotating about a scanned subject; at least two cone beam X-Ray sources displaced from each other mounted on said gantry; at least one 2D detector array mounted on said gantry, said detector is capable of receiving radiation emitted by said at least two X-Ray sources and attenuated by the subject to be scanned; a first image processor capable of generating and displaying CT images of a volume within the subject; a second image processor capable of generating projection X-Ray images of said volume, wherein the images are responsive to X-Ray separately emitted by each of said at least two cone beam X-Ray sources; and a third image processor capable of generating and displaying fluoroscopic images composed of said projection X-Ray images, wherein said fluoroscopic images are spatially registered to said CT images.
    Type: Grant
    Filed: April 7, 2009
    Date of Patent: May 24, 2011
    Assignee: Arineta Ltd.
    Inventors: Ehud Dafni, Rafael Shmeul Brada
  • Patent number: 7940888
    Abstract: An X-ray imaging apparatus includes an X-ray source including a plurality of X-ray focuses, an X-ray detector which detects X-rays emitted from the X-ray focuses and transmitted through an object, and a control unit which controls the X-ray source and the X-ray detector. The X-ray imaging apparatus selects a pair of X-ray focuses, of X-ray focuses of the plurality of X-ray focuses which project images on the X-ray detector through a region of interest which is an imaging region of the object, from which emitted X-rays define an intersecting angle coinciding with a predetermined angle in the region of interest, and decides an X-ray focus to be used for imaging from X-ray focuses between the selected pair of X-ray focuses. An X-ray image is captured by emitting X-rays from the decided X-ray focus and causing the X-ray detector to detect the X-rays.
    Type: Grant
    Filed: September 14, 2010
    Date of Patent: May 10, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventor: Osamu Tsujii
  • Patent number: 7933378
    Abstract: A computed tomography system (100) includes a first (1081) and a second source (108N) disposed at different z-axis locations at about a same angular position around an examination region (112) that alternately emit radiation beams (114) that traverse the examination region (112). The first source (1081) emits a first radiation beam (1141) having a first outer projection (204) and the second source (108N) emits a second radiation beam (114N) having a first outer projection (216). Both of the first outer projections (204, 216) traverse plane perpendicular to the axis of rotation, and the first outer projections (204, 216) define a width of a volume (400) within which the emitted radiation beams (114) are confined. A common detector (124) detects radiation from the x-ray beams (114) that traverses the volume (400) and generates data indicative thereof, and a reconstructor (132) reconstructs the data to generate an image of the volume (400).
    Type: Grant
    Filed: July 24, 2007
    Date of Patent: April 26, 2011
    Assignee: Koninklijke Philips Electronics N.V.
    Inventor: Roand Proksa
  • Patent number: 7929659
    Abstract: A computed tomographic imaging system is provided for generating computed tomography images. The computed tomographic system includes a processor configured to access image data encoding X-ray projections at a detector position and a plurality of X-ray source beam focal spot positions and to align pixel values for the projections in a direction of deviation of the positions. The processor is also configured to determine a correction factor for at least one of the projections based upon the aligned pixel values and upon a sum of the projections and to correct the pixel values for the at least one of the projections based upon the correction factor.
    Type: Grant
    Filed: July 24, 2008
    Date of Patent: April 19, 2011
    Assignee: General Electric Company
    Inventors: Xiaoye Wu, Fang Frank Dong, James Walter Leblanc
  • Patent number: 7929663
    Abstract: Apparatus for monitoring in real time the movement of a plurality of substances in a mixture, such as oil water and air flowing through a pipe comprises an X-ray scanner arranged to make a plurality of scans of the mixture over a monitoring period to produce a plurality of scan data sets, and control means arranged to analyze the data sets to identify volumes of each of the substances and to measure their movement. By identifying volumes of each of the substances in each of a number of layers and for each of a number of scans, real time analysis and imaging of the substance can be achieved.
    Type: Grant
    Filed: April 12, 2010
    Date of Patent: April 19, 2011
    Assignee: Rapiscan Systems, Inc.
    Inventor: Edward James Morton
  • Publication number: 20110080992
    Abstract: An X-ray source system for a CT scanner includes a plurality of X-ray sources, wherein each X-ray source of the plurality is provided with a cathode from which an electron beam is emitted, an anode to receive the electron beam and at least one grid electrode, wherein the grid electrodes are configured to selectably block radiation from said X-ray sources; a high voltage generator for applying voltage to the plurality of X-ray sources, wherein each of the plurality of X-ray sources are configured to present substantially the same load to the high voltage generator; a grid modulator configured to apply voltage to grid electrodes of each of the plurality of X-ray sources in turn; and a controller for controlling the grid modulator so that only one of the plurality of X-ray sources emits radiation at any one time.
    Type: Application
    Filed: December 13, 2010
    Publication date: April 7, 2011
    Applicant: Arineta Ltd.
    Inventor: Ehud DAFNI
  • Publication number: 20110075794
    Abstract: A method is provided for quickly and simply generating a three-dimensional tomographic x-ray imaging. Tomosynthetic projection images are recorded from different recording angles along a tomosynthetic scanning path and three-dimensional image data is reconstructed from the tomosynthetic projection images. The tomosynthetic projection images are recorded by a tomosynthetic x-ray device with a plurality of x-ray sources arranged on a holder at a distance from one another. Each projection image is recorded by a different x-ray source being fixed in one place during recording the tomosynthetic projection images.
    Type: Application
    Filed: September 27, 2010
    Publication date: March 31, 2011
    Inventors: Jan Boese, Frank Dennerlein, Benno Heigl, Holger Kunze, Michael Maschke
  • Patent number: 7899151
    Abstract: An operating method for a polyplanar imaging system for time-resolved imaging of an object is provided. First and second data records are recorded at a fan angle ? from different angular positions by a first and second imaging planes arranged at an offset angle ? relative to each other and swiveled through an angle of at least ?=180°+?. A third data record is created by selecting projection images from the first data record beginning from a starting angle ? and from the second data record so that the third data record covers an angular range of at least ?. Three-dimensional images are reconstructed based on the third data record. The starting angle ? is varied for continuously creating the third data record until ? has attained its final value. The contrast of projection images in the third data record or of three-dimensional images is evaluated.
    Type: Grant
    Filed: March 24, 2009
    Date of Patent: March 1, 2011
    Assignee: Siemens Aktiengesellschaft
    Inventors: Jan Boese, Norbert Rahn
  • Patent number: 7894572
    Abstract: A tomographic apparatus (10) includes at least two x-ray sources (14) that rotate about and alternately emit radiation into an imaging region (22). The at least two x-ray sources (14) emit radiation from a first set of angular positions during a first data acquisition cycle and from a different set of angular positions during a subsequent data acquisition cycle. At least two sets of detectors (24) detect primary radiation emitted by a corresponding one of the at least two x-ray sources (14) and produce data representative of the detected radiation. An interleaver (32) interleaves the data associated with the first and the subsequent data acquisition cycles for each of the at least two x-ray sources (14).
    Type: Grant
    Filed: May 9, 2007
    Date of Patent: February 22, 2011
    Assignee: Koninklijke Philips Electronics N.V.
    Inventor: Andy Ziegler
  • Patent number: 7889835
    Abstract: A system and method for ascertaining the identity of an object within an enclosed article. The system includes an acquisition subsystem, a reconstruction subsystem, a computer-aided detection (CAD) subsystem, and an alarm resolution subsystem. The acquisition subsystem communicates view data to the reconstruction subsystem, which reconstructs it into image data and communicates it to the CAD subsystem. The CAD subsystem analyzes the image data to ascertain whether it contains any area of interest. A feedback loop between the reconstruction and CAD subsystems allows for continued, more extensive analysis of the object. Other information, such as risk variables or trace chemical detection information may be communicated to the CAD subsystem to dynamically adjust the computational load of the analysis.
    Type: Grant
    Filed: December 18, 2003
    Date of Patent: February 15, 2011
    Assignee: Morpho Detection, Inc.
    Inventors: Robert August Kaucic, Ricardo Scott Avila, Samit Kumar Basu, Forrest Frank Hopkins
  • Patent number: 7889834
    Abstract: A method and CT system are disclosed for preparing reconstructed CT image data records. In at least one embodiment of the method, an initial material distribution of an examination object is determined from CT data records determined from among at least two different spectral weightings with local energy-determined attenuation values, and local measurement-spectrum-dependent weighting functions are determined using this material distribution, enabling local measurement-spectrum-dependent attenuation functions to be calculated, and the distribution of local reference materials to be determined, with the help of plausibility considerations, from a list of reference materials over at least one specified region of interest in the examination object on the basis of previously calculated local measurement-spectrum-dependent attenuation functions.
    Type: Grant
    Filed: April 9, 2009
    Date of Patent: February 15, 2011
    Assignee: Siemens Aktiengesellschaft
    Inventor: Björn Heismann
  • Patent number: 7885375
    Abstract: A technique is provided for imaging a field of view using an X-ray source comprising two or more emission points. The two or more emission points may be independently operated. Independent operation of the two or more emission points in performed in accordance with a list of commands that specifies the operation of the emission points. The list of commands, in one embodiment, is stored in a sequence buffer. In other embodiments, the list of commands is generated for a given usage, without being stored in a sequence buffer.
    Type: Grant
    Filed: October 20, 2008
    Date of Patent: February 8, 2011
    Assignee: General Electric Company
    Inventors: Bruno Kristiaan Bernard De Man, Daniel David Harrison, Maria Iatrou, Brian Patrick Smyth, Zhye Yin, Samit Kumar Basu, Souma Sengupta, Peter Claudius Sanza
  • Patent number: 7885378
    Abstract: An imaging method and apparatus is described in which distances between a source and an object are changed and projection images are generated at each of the different distances.
    Type: Grant
    Filed: October 4, 2006
    Date of Patent: February 8, 2011
    Assignee: The General Hospital Corporation
    Inventors: Daniel B. Kopans, Richard H. Moore
  • Patent number: 7876881
    Abstract: A system according to some embodiments may include a treatment head to emit a megavoltage radiation beam toward a volume, a plurality of X-ray sources to emit a respective kilovoltage radiation beam toward the volume while the plurality of X-ray sources are substantially stationary with respect to the volume, a detector to receive the plurality of kilovoltage radiation beams after having passed through the volume, and a processor to generate a three-dimensional image of the volume based only on the plurality of kilovoltage radiation beams received by the detector while the plurality of X-ray sources were substantially stationary with respect to the volume.
    Type: Grant
    Filed: September 17, 2007
    Date of Patent: January 25, 2011
    Assignee: Siemens Medical Solutions USA, Inc.
    Inventor: Andrew Jeffery
  • Patent number: 7869561
    Abstract: Apparatus for CT cone beam scanning, comprising: a table for holding a subject; a gantry; a first detector array, having a given number of rows of detector elements spaced along an rotation axis of the gantry, mounted on the gantry; a first plurality of x-ray sources mounted on the gantry for rotation about the patient table on a rotation axis, the number of rows being at least twice the number of sources; and a controller that acquires data responsive to radiation from the sources from the detector array attenuated by at least part of the common volume of the subject irradiated by the plurality of radiation sources.
    Type: Grant
    Filed: April 10, 2007
    Date of Patent: January 11, 2011
    Assignee: Arineta Ltd.
    Inventor: Ehud Dafni
  • Patent number: 7864917
    Abstract: An imaging apparatus includes a multi-dimensional assembly supporting a plurality of x-ray sources that are individually addressable. The plurality of x-ray sources is further configurable to simultaneously emit x-ray spectra at different mean energies. Furthermore, the multi-dimensional assembly includes a plurality of x-ray detectors that are arranged to detect at least a part of the x-rays that are emitted from at least one of the x-ray sources.
    Type: Grant
    Filed: January 23, 2007
    Date of Patent: January 4, 2011
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Carolina Ribbing, Peter Klaus Bachmann, Matthijs Adriaansz, Han Kroon, Herman Stegehuis, Hans Nikol
  • Patent number: 7860210
    Abstract: A method for imaging an object in a computed tomography (CT) system with a plurality of sources comprising a first source and a second source, wherein the plurality of sources together with a detector array are mounted on a rotatable gantry, and wherein an intensity of the second source has unknown fluctuations is provided. Projection data is collected using the first source in a first gantry position. Projection data is collected using the second source in a second gantry position, wherein projection data from the first source in the first gantry position substantially overlaps projection data from the second source in the second gantry position. Data from the first source at the first gantry position is used to correct for source fluctuations of the second source at the second gantry position.
    Type: Grant
    Filed: November 18, 2008
    Date of Patent: December 28, 2010
    Assignee: The Board of Trustees of the Leland Stanford Junior University
    Inventors: Norbert J. Pelc, Jongduk Baek
  • Patent number: 7856078
    Abstract: A method is disclosed for generating computed tomography displays, in which with the aid of at least one X-ray source, an examination object is scanned in a rotationally circulating fashion with a measured dose rate dependent on the circulation angle, projection data are collected from a multiplicity of viewing angles, and at least similarly redundant projection data from angularly identical or angularly complementary projection angles with a different measured dose are interpolated with distance weighted relative to a projection value and are used for reconstruction. According to at least one embodiment of the invention, during the distance weighted interpolation of the at least similarly redundant projection data an additional noise optimizing weighting is carried out as a function of the noise present per projection value.
    Type: Grant
    Filed: May 19, 2008
    Date of Patent: December 21, 2010
    Assignee: Siemens Aktiengesellschaft
    Inventors: Herbert Bruder, Rainer Raupach, Bernhard Schmidt
  • Patent number: 7856077
    Abstract: At least one embodiment of the present invention relates to a CT scanner and/or a method for helical scanning of an examination object which has at least one portion undergoing periodic motion.
    Type: Grant
    Filed: November 19, 2008
    Date of Patent: December 21, 2010
    Assignee: Siemens Aktiengesellschaft
    Inventors: Herbert Bruder, Thomas Flohr
  • Patent number: 7852984
    Abstract: The invention relates to a method and a device for the separate three-dimensional representation of arteries and/or veins in a vascular system of the body by means of a C-arm biplanar system having two C-arms, which can each record a sequence of x-ray images from different projection angles during a mask or filler pass. With the filler pass, both C-arms record x-ray images, so that the x-ray images of the filler pass can be combined to form a first data record, which contains x-ray images from the arterial phase of the vascular contrasting and/or to form a second data record, which contains x-ray images from the venous phase of the vascular contrasting. This enables the arterial and venous phases to be reconstructed separately.
    Type: Grant
    Filed: June 30, 2009
    Date of Patent: December 14, 2010
    Assignee: Siemens Aktiengesellschaft
    Inventor: Michael Zellerhoff