Plural Sources Patents (Class 378/9)
  • Patent number: 8519341
    Abstract: This invention has one object to provide radiation tomography apparatus that allows suppression of arithmetic load of detection data with a wider detector ring. In order to achieve this purpose, the radiation tomography apparatus according to this invention performs coincidence only when two scintillation counter crystals that detect gamma rays coincidentally (A) belong to the same ring unit, or (B) belong to each of the ring units adjacent to each other. Accordingly, a distance in the central axis direction between the radiation detecting elements is limited to be equal to or less than a thickness of the ring unit in the central axis direction. Accordingly, radiation tomography apparatus may be provided that allows generation of the sectional image suitable for diagnosis while arithmetic load is suppressed.
    Type: Grant
    Filed: January 30, 2009
    Date of Patent: August 27, 2013
    Assignee: Shimadzu Corporation
    Inventors: Atsushi Ohtani, Masaharu Amano, Yoshihiro Inoue, Kazumi Tanaka, Tetsuro Mizuta
  • Patent number: 8509380
    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: Grant
    Filed: March 18, 2011
    Date of Patent: August 13, 2013
    Assignees: The Board of Trustees of the Leland Stanford Junior University, Triple Ring Technologies, Inc.
    Inventors: Norbert Joseph Pelc, Tobias Funk, Joseph Anthony Heanue, Waldo Stephen Hinshaw, Edward Gerald Solomon, Brian Patrick Wilfley
  • Patent number: 8491188
    Abstract: A method for acquiring X-ray image data of an imaging volume is disclosed, the method using a detector and a distributed X-ray source structure having a plurality of single source elements, which are uniformly distributed with a common pitch to each other, the method comprises moving the distributed X-ray source structure and/or the detector with respect to the imaging volume, importantly, the maximum moving distance dmax of the distributed X-ray source structure during the acquisition of the X-ray image data is limited to the length lp of the pitch. Emitting of X-rays from the distributed X-ray source structure and generating a plurality of signals in response to the X-rays incident upon the detector are executed during the movement.
    Type: Grant
    Filed: February 19, 2009
    Date of Patent: July 23, 2013
    Assignee: Koninklijke Philips N.V.
    Inventors: Gereon Vogtmeier, Joerg Bredno, Juergen Weese
  • Patent number: 8494110
    Abstract: X-ray imaging method, in which the data (c(a), ?(b)) are processed by a programmed computer using the following formula: C = ? ( b ) n + c ( a ) n - 1 2 n 2 ? ( ? k = 1 n ? c k ( a ) + ? u = 1 n ? ? u ( b ) ) to calculate a value (C) of the attenuation coefficient at a point (P0) of a set of points {P0}, for a given pair of said angular positions ?a and ?b, in order to obtain an image representing an X-ray attenuation coefficient for said set of points {P0} of the body (3).
    Type: Grant
    Filed: June 18, 2010
    Date of Patent: July 23, 2013
    Inventor: Norbert Beyrard
  • Patent number: 8483360
    Abstract: The techniques described herein provide for correcting projection data that comprises contamination due to source switching in a multi energy scanner. The correction is a multi-neighbor correction. That is, it uses data from at least two other views of an object (e.g., generally a previous view and a subsequent view) to correct a current view of the object. The multi-neighbor correction may use one or more correction factors to determine how much data from the other two views to use to correct the current view. The correction factor(s) are determined based upon a calibration that utilizes image space data and/or projection space data of a phantom. In this way, the correction factor(s) account for source leakage that occurs in multi energy scanners.
    Type: Grant
    Filed: June 12, 2009
    Date of Patent: July 9, 2013
    Assignee: Analogic Corporation
    Inventors: Andrew Litvin, Julia Pavlovich, Aleksander Roshi, Sergey Simanovsky, Ram Naidu
  • Publication number: 20130170611
    Abstract: The present subject matter relates to inspection systems, devices and methods for x-ray inspection of objects. A conveyor can move an object to be inspected through an inspection zone along a direction of travel, one or more multibeam x-ray source arrays can provide multiple collimated x-ray beams through the inspection zone along a direction substantially perpendicular to the direction of travel, and one or more x-ray detector arrays can detect x-ray beams passing through the inspection zone from the x-ray source array. X-ray signals detected by the x-ray detector array can be recorded to form multiple x-ray projection images of the object, and the multiple x-ray projection images can be processed into three-dimensional tomographic images of the object.
    Type: Application
    Filed: November 21, 2012
    Publication date: July 4, 2013
    Applicant: XINRAY SYSTEMS INC
    Inventor: XINRAY SYSTEMS INC
  • Publication number: 20130170612
    Abstract: Apparatus and method for acquiring panoramic, teleradiographic and optionally CBCT volumetric dental radiographies, comprising a support holding a rotary arm which in its turn supports at one end a first X-ray source and at the other end an X-ray detector at a suitable distance for acquiring panoramic and optionally CBCT volumetric images. Apparatus comprises only one patient positioning system and a second X-ray source at a distance from detector suitable for acquiring cranial teleradiographies.
    Type: Application
    Filed: December 19, 2012
    Publication date: July 4, 2013
    Applicant: Cefla Societa Cooperativa
    Inventors: Davide BIANCONI, Luca Guardini, Dario Righini
  • Publication number: 20130156150
    Abstract: A radiation tomography apparatus comprising a first imaging device for taking tomography images of a subject by introducing the subject in an introduction direction of the subject, a support member for supporting the subject, a support-member moving device for moving the support member in the introduction direction of the subject, a support-member movement controller for controlling the support-member moving device, a first cylinder provided in a first imaging view field of the first imaging device and having an opening extending in the introduction direction for introducing the support member and a first positioning device for positioning the first cylinder relative to the first imaging view field, the first cylinder guiding the movable support member.
    Type: Application
    Filed: December 19, 2012
    Publication date: June 20, 2013
    Applicant: SHIMADZU CORPORATION
    Inventor: SHIMADZU CORPORATION
  • Patent number: 8462911
    Abstract: When performing nuclear (e.g., SPECT or PET) and CT scans on a patient, a volume cone-beam CT scan is performed using a cone-beam CT X-ray source (20) and an offset flat panel X-ray detector (22). A field of view of the X-ray source overlaps a field of view of two nuclear detector heads (18), and the offset of the X-ray detector (22) minimizes interference with nuclear detector head movement about a rotatable gantry (16). Additionally, a locking mechanism (80) provides automatically locking of the X-ray detector (22) in each of a stowed and operation position, improving safety and CT image quality.
    Type: Grant
    Filed: October 29, 2008
    Date of Patent: June 11, 2013
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: John F. Vesel, Michael J. Petrillo, Ian Farmer, Mahmoud Janbakhsh, Rizwan Hassan, Paul Hug, Joseph J. Stefan, Marc A. Huber
  • Publication number: 20130121459
    Abstract: A C-arm system includes a first floor-mounted C-arm, a second ceiling-mounted C-arm, and a recording space for an object that is to be examined. The C-arms and the recording space are arranged in relation to each other such that recordings of the object may be made by the C-arms in two different planes. The second C-arm is configured for an orbital movement about an angular range of at least 180 degrees.
    Type: Application
    Filed: November 8, 2012
    Publication date: May 16, 2013
    Inventor: Michael Meyer
  • Patent number: 8406373
    Abstract: A method and imaging system for operating imaging computed tomography using a radiation source and a plurality of detectors to generate an image of an object. The method includes: defining a desired image characteristics; and performing calculations to determine the pattern of fluence to be applied by the radiation source, to generate said desired image quality or characteristics. Then, the radiation source is modulated, to generate the intended pattern of fluence between the beam source and the object to be imaged. The desired image characteristics can comprise at least one of desired levels of contrast-to-noise ratio (CNR) and signal-to-noise ratio (SNR), and may provide at least one of: desired image quality in at least one defined region of interest; and at least one desired distribution of said image quality.
    Type: Grant
    Filed: August 15, 2011
    Date of Patent: March 26, 2013
    Assignee: University Health Network
    Inventors: Sean A. Graham, David A. Jaffray, Jeffrey H. Siewerdsen
  • Patent number: 8396275
    Abstract: An x-ray CT system and a method are disclosed for creating tomographic recordings with the aid of an x-ray CT system, with two emitter/detector arrangements operating with an angular offset on a gantry with at least two different x-ray energy spectra. In at least one embodiment, at least one first recording is reconstructed from detector data from two quarter rotations with different x-ray energy spectra and at least one second recording is created from detector data of a scan of at least one of the emitter/detector arrangements over a half rotation. According to at least one embodiment of the invention, the recordings are subjected to high-pass filtering or low-pass filtering in respect of their spatial frequencies and then the filtered recordings are combined to give a resulting recording.
    Type: Grant
    Filed: October 8, 2009
    Date of Patent: March 12, 2013
    Assignee: Siemens Aktiengesellschaft
    Inventors: Herbert Bruder, Thomas Flohr, Rainer Raupach
  • Publication number: 20130034201
    Abstract: An X-ray imaging apparatus has at least one X-ray image system rotatable about an examination volume. The X-ray image system is controlled such that during a continuous rotation of the system, at least one 2D projection image is recorded. An image generation facility generates the 2D projection image from the measured data. The X-ray source includes an X-ray focus which can be changed in terms of position, which, during the recording of the 2D projection image, moves counter to the direction of rotation of the X-ray image system such that its spatial position in a fixed coordinate system does not change. The X-ray detector records several 2D partial images, from which the 2D projection image is calculated with the rotational movement of the X-ray detector being at least approximately compensated. The 2D projection images have significantly reduced image blur.
    Type: Application
    Filed: August 2, 2012
    Publication date: February 7, 2013
    Applicant: SIEMENS AKTIENGESELLSCHAFT
    Inventors: JAN BOESE, FRANK DENNERLEIN, THOMAS REDEL
  • Patent number: 8363050
    Abstract: In a method and device for generating a tomosynthetic 3D x-ray image, a number of digital x-ray images of an examination subject are acquired at respectively different projection angles, within a limited angle range, using an x-ray source and a digital x-ray detector. At an initial position for a selected projection angle, a spatially-fixed reference point is projected onto a partial region of the acquisition surface of the x-ray detector. For each further projection angle, a corresponding partial region on the acquisition surface is automatically determined. The tomosynthetic 3D image is reconstruction exclusively using image data from the respective partial regions.
    Type: Grant
    Filed: February 8, 2007
    Date of Patent: January 29, 2013
    Assignee: Siemens Aktiengesellschaft
    Inventors: Jasmina Ludwig, Thomas Mertelmeier
  • Publication number: 20130003913
    Abstract: Disclosed is a tomosynthesis system in which the maintenance is easily performed. The tomosynthesis system of the present disclosure includes a vacuum chamber, a plurality of X-ray sources configured to be coupled to the vacuum chamber so as to protrude from the vacuum chamber to generate X-rays in a direction of a subject and an image sensor configured to detect an X-ray projection image that passes through the subject.
    Type: Application
    Filed: June 15, 2012
    Publication date: January 3, 2013
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Jin Woo Jeong, Yoon Ho Song
  • Publication number: 20120300897
    Abstract: A computed tomography system includes at least two simultaneously operatable sets of detector elements, with at least one first set of integrating detector elements being designed for integrating radiation measurement and at least one second set of counting detector elements being designed to disperse an incident radiation spectrum into at least two energy bins; and includes a computer system for controlling the CT system and at least once capturing the measurement data of the detector elements with a memory and computer programs contained therein. The computer system is provided with programming so that a first mode is provided for operating only the at least one first set of integrating detector elements and a second mode is provided for the additional or sole operation of the at least one second set of counting detector elements.
    Type: Application
    Filed: May 23, 2012
    Publication date: November 29, 2012
    Applicant: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Thomas Flohr, Gabriel Haras, Daniel Niederlöhner, Stefan Pflaum
  • Publication number: 20120301001
    Abstract: A method and a dual-source CT are disclosed. In at least one embodiment, the projection data of the integrating and of the counting detector from a quarter rotation of the gantry is used jointly for reconstruction of a first tomographic image dataset, the energy-resolved projection data of the counting detector from at least one half rotation of the gantry being used for reconstruction of at least a second material-selective tomographic image dataset, and at least one tomographic result image dataset being formed by overlaying the first tomographic image dataset with the material selection of the second image dataset.
    Type: Application
    Filed: May 23, 2012
    Publication date: November 29, 2012
    Applicant: Siemens Aktiengesellschaft
    Inventors: Thomas Flohr, Gabriel Haras, Daniel Niederlöhner, Stefan Pflaum
  • Patent number: 8320519
    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: Grant
    Filed: June 13, 2007
    Date of Patent: November 27, 2012
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Carolina M. Ribbing, Gereon Vogtmeier, Roland Proksa
  • Patent number: 8306181
    Abstract: A multi-functional dental extra-oral x-ray imaging system includes a conventional x-ray source and manipulator to control the movement of the x-ray source by translating and rotating, a real time multiple frame producing x-ray imaging device and at least two different exposure profile programs, whereas one of such profiles produces a standard panoramic image and a second of such profiles produces an angled or transverse slice to a the panoramic image. A third exposure profile program produces a substantially linear projection of the human skull by combining two linear projections, one for the right and one for the left part of the head. The sensor is a linear direct conversion operating preferably in the frame mode and producing more than 100 fps.
    Type: Grant
    Filed: July 28, 2009
    Date of Patent: November 6, 2012
    Assignee: Oy AJAT Ltd
    Inventors: Konstantinos Spartiotis, Tuomas Pantsar, Henrik Viking Lohman
  • Publication number: 20120269317
    Abstract: A multi-source computed tomography system has a first x-ray source and a second x-ray source that are respectively optimized for different imaging procedures and can be used simultaneously in the multi-source CT system. The first x-ray source can be optimized for higher power short-term operation and the second x-ray source can be optimized for lower power, longer term operation.
    Type: Application
    Filed: September 28, 2010
    Publication date: October 25, 2012
    Applicant: Alstom Technology Ltd
    Inventors: Sven Fritzler, Jan Matschulla
  • Patent number: 8295564
    Abstract: Methods and apparatus provide for marking a location in a medical image, including: providing a first marker within a first medical image, which shows an object, at a first location, determining a second location, which corresponds to the first location, within a second medical image showing the same object, marking the second location with a second marker, which is different to the first marker, and presenting the first medical image, the first marker, the second medical image and the second marker.
    Type: Grant
    Filed: November 26, 2007
    Date of Patent: October 23, 2012
    Assignee: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
    Inventor: Horst Hahn
  • Publication number: 20120257710
    Abstract: The present invention pertains to an apparatus and method for X-ray imaging a human patient. A vacuum bell bonded to an X-ray radiation-permeable window that can emit X-ray radiation from a plurality of spots located 1 cm from its edge, a collimator, and a detector are used. A ring of stationary X-ray sources can also be used with a stationary collimator and a rotating slot collimator and detector. An X-ray beam can be aligned in an X-ray system by establishing a position of the beam with respect to a moving collimator at a number of points in time, monitoring the velocity of the collimator, navigating the beam to a calculated position of a hole in the collimator, and correcting the alignment of the beam based on the location of the beam on the detector.
    Type: Application
    Filed: April 5, 2012
    Publication date: October 11, 2012
    Inventor: TOBIAS FUNK
  • Publication number: 20120257711
    Abstract: In radiotherapy apparatus comprising an imager for the MV beam and a separate kV imaging system, it is common for there to be significant artefacts in the kV image arising from the MV pulse. We disclose such a radiotherapy apparatus which is adapted to (i) cause the therapeutic source to emit radiation while keeping the diagnostic source inactive, (ii) read an image from the detector associated with the therapeutic source, (iii) cause the diagnostic source to emit radiation and while keeping the therapeutic source inactive, (iv) read an image from the detector associated with the diagnostic source, and (v) repeat as necessary. The control unit is preferably adapted to, at steps (ii) and (iv), read an image from both of the detectors, or to clear the “inactive” detector. The detectors are ideally flat-panel detectors, capturing a two-dimensional image.
    Type: Application
    Filed: December 21, 2009
    Publication date: October 11, 2012
    Applicant: ELEKTA AB (PUBL)
    Inventor: Christopher Knox
  • Publication number: 20120250820
    Abstract: A method is disclosed for obtaining a 4D image data record of an object under examination using measured data from a computed tomography system in which projection data are accepted which were acquired by way of the computed tomography system at different imaging time points by way of an helical scan method following the administration of contrast medium to the object under examination). On the basis of the projection data, image data of the object under examination are then reconstructed and linked with the imaging time points to a space/time data record. Then, a parameterized 4D image data model is individualized with adaptation to the space/time data record by varying model parameters. An image processing device and a computed tomography system with an image processing device of this kind are also described.
    Type: Application
    Filed: March 30, 2012
    Publication date: October 4, 2012
    Applicant: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Gabriel Haras, Stefan Thesen, Carsten Thierfelder, Johann Uebler
  • Patent number: 8270562
    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: Grant
    Filed: December 21, 2009
    Date of Patent: September 18, 2012
    Assignee: General Electric Company
    Inventors: Paavana Sainath, Peter Crandall, Abdelaziz Ikhlef, Chad Smith, Ron Kent Hockersmith, Baojun Li
  • Publication number: 20120230463
    Abstract: The present specification discloses an X-ray scanning system for scanning an object. The processing system has processors adapted to receive X-ray tomographic image data and extract parameters from the data, where the parameters include constant grey level, texture or statistics. The processing system also includes processors for executing decision trees, where the processors receive the parameters and construct information using the parameters and processors for conducting a database search, where the database search maps the information to a threat level and allocates the object being scanned to a safety category.
    Type: Application
    Filed: February 10, 2012
    Publication date: September 13, 2012
    Applicant: Rapiscan Systems, Inc.
    Inventor: Edward James Morton
  • Publication number: 20120230464
    Abstract: An arc radiotherapy and imaging system is provided which includes a first radiation source and a second radiation source. The first radiation source is suitable for treating a region of a patient, and the second radiation source is suitable for imaging the region of the patient. A control is also provided for automatically adjusting system operation, according to a defined schedule, between treating the region of the patient using the first radiation source and imaging the region of the patient using the second radiation source, thereby facilitating both treating and imaging of the region of the patient.
    Type: Application
    Filed: February 16, 2012
    Publication date: September 13, 2012
    Applicants: VARIAN MEDICAL SYSTEMS, INC., SLOAN-KETTERING INSTITUTE FOR CANCER RESEARCH
    Inventors: C. Clifton LING, Margie A. HUNT, Pengpeng ZHANG, Athanasios ETMEKTZOGLOU, Edward SHAPIRO
  • Patent number: 8265223
    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: Grant
    Filed: July 14, 2009
    Date of Patent: September 11, 2012
    Assignee: Koninklijke Philips Electronics N.V.
    Inventor: Roland Proksa
  • Publication number: 20120224667
    Abstract: Apparatus and methods for therapy delivery are disclosed. In one embodiment, a therapy delivery system includes a plurality of movable components including a radiation therapy nozzle and a patient pod for holding a patient, a patient registration module for determining a desired position of at least one of the plurality of movable components, and a motion control module for coordinating the movement of the least one of the plurality of movable components from a current position to the desired position. The motion control module includes a path planning module for simulating at least one projected trajectory of movement of the least one of the plurality of moveable components from the current position to the desired position.
    Type: Application
    Filed: April 13, 2012
    Publication date: September 6, 2012
    Inventors: Chieh C. Cheng, David A. Lesyna, Michael F. Moyers
  • Patent number: 8259899
    Abstract: The invention relates to a multi-modality tomography apparatus (11) including a first tomograph (13) and a second tomograph or imaging system (14) using different tomography techniques, such as X-ray CT tomography and PET or SPECT tomography, or a tomographic or planar optical imaging system, which are located on the same face of a support means (12) which can rotate in both directions of rotation around an axial support shaft (12), such that a subject undergoing examination and placed on a subject support does not have to be moved during a tomographic examination with any of the two tomographs (13, 14) installed on the same face of the support (12).
    Type: Grant
    Filed: October 26, 2006
    Date of Patent: September 4, 2012
    Assignee: Fundacion Para la Investigacion Biomedica del Hospital Gregorio Maranon
    Inventors: Juan José Vaquero López, Manuel Menéndez Desco
  • Publication number: 20120201345
    Abstract: Some aspects include acquisition of a first plurality of projection images of a volume using a megavoltage x-ray source, each of the first plurality of projection images associated with a respective one of a first plurality of locations of the megavoltage x-ray source, acquisition of a second plurality of projection images of the volume using a kilovoltage x-ray source, each of the second plurality of projection images associated with a respective one of a second plurality of locations of the kilovoltage x-ray source, and performance of digital tomosynthesis reconstruction to generate a three-dimensional image of the volume based on the first plurality of projection images and the second plurality of projection images. The first axis may be perpendicular to the second axis.
    Type: Application
    Filed: February 8, 2012
    Publication date: August 9, 2012
    Applicant: Siemens Medical Solutions USA, Inc.
    Inventors: Ajay Paidi, Jonathan Maltz, Ali Bani-Hashemi
  • Patent number: 8220993
    Abstract: Fan beams of radiation are output from a multiplicity of radiation sources. Radiation is output simultaneously only from a part of the radiation sources having irradiation ranges that neither overlap with each other nor are adjacent to each other. Image correction data corresponding to each group of radiation sources is obtained by sequentially outputting radiation to the radiographic image detector while the groups of radiation sources are sequentially switched without setting a subject. An effective area that has a value higher than a predetermined threshold value is determined for each image correction data. Radiation is sequentially output to the radiographic image detector in a state in which a subject is set while groups of radiation sources are switched. Radiation image data obtained based on the effective area, and which corresponds to each of the groups of radiation sources, is corrected based on the image correction data.
    Type: Grant
    Filed: February 1, 2010
    Date of Patent: July 17, 2012
    Assignee: Fujifilm Corporation
    Inventor: Kenji Takahashi
  • Publication number: 20120163531
    Abstract: A tetrahedron beam computed tomography system including an x ray source array that sequentially emits a plurality of x ray beams at different positions along a scanning direction and a collimator that intercepts the plurality of x-ray beams so that a plurality of fan-shaped x-ray beams emanate from the collimator towards an object. The system includes a first detector receiving a first set of fan-shaped x ray beams after they pass through the object, the first detector generating a first imaging signal for each of the received first set of fan-shaped x-ray beams and a second detector receiving a second set of fan-shaped x ray beams after they pass through the object, the second detector generating a second imaging signal for each of the received second set of fan-shaped x-ray beams. Each detector and source pair form a tetrahedral volume. In other embodiments, the system may also have more than two detectors arrays and/or more than one source array.
    Type: Application
    Filed: July 29, 2011
    Publication date: June 28, 2012
    Inventors: Tiezhi Zhang, Xiaochao Xu, Joshua Kim, Di Yan, Alvaro Martinez
  • Patent number: 8208600
    Abstract: There are provided an X-ray generating apparatus capable of switching X-ray beams of high energy and low energy to each other at high speed, and an X-ray CT apparatus capable of performing high-speed and high-quality multi-energy imaging by using the same. The X-ray generating apparatus is constructed by an X-ray tube 9 having two anodes 200a, 200b, a rotational anode 204 for radiating X-ray from an X-ray focal point by electron beams emitted from filaments of these cathodes, and two grid electrodes 202a and 202b for controlling emission of the electron beams, a tube voltage generator 9a and a tube voltage controller 9d1 for controlling an X-ray condition, a filament heater 9b and a tube current controller 9d2, a grid voltage generator 9c and a grid opening/closing controller 9d3, and a grid switching unit 9e. High energy X-ray and low energy X-ray are switched and emitted to an examinee every adjacent projection angles, thereby collecting projection data.
    Type: Grant
    Filed: July 18, 2008
    Date of Patent: June 26, 2012
    Assignee: Hitachi Medical Corporation
    Inventors: Yoshiaki Tsumuraya, Hironori Ueki, Keiji Koyanagi
  • Patent number: 8204173
    Abstract: The present application is directed toward the generation of three dimensional images in a tomography system having X-ray sources offset from detectors, in particular in a system where the sources are located on a plane, while detectors are located on multiple parallel planes, parallel to the plane of sources and all the planes of detectors lie on one side of the plane of sources. A controller operates to rebin detected X-rays onto a non-flat surface, perform two dimensional reconstruction on the surface, and generate the three dimensional image from reconstructed images on the plurality of surfaces.
    Type: Grant
    Filed: July 13, 2010
    Date of Patent: June 19, 2012
    Assignee: Rapiscan Systems, Inc.
    Inventors: Marta Betcke, William Robert Breckon Lionheart, Edward James Morton
  • Patent number: 8189893
    Abstract: Methods, systems, and computer program products for binary multiplexing x-ray radiography are disclosed. According to one aspect, the subject matter described herein can include irradiating an object with composite x-ray beams including signals based on a predetermined binary transform. Further, the subject matter described herein can include detecting x-ray intensities associated with the signals of the composite x-ray beams. An inverse binary transform can be applied to the detected x-ray intensities associated with the signals of the composite x-ray beams to recover the signals of the composite x-ray beams.
    Type: Grant
    Filed: May 21, 2007
    Date of Patent: May 29, 2012
    Assignees: The University of North Carolina at Chapel Hill, North Carolina State University
    Inventors: Jian Zhang, Jianping Lu, Otto Z. Zhou, David Lalush
  • Publication number: 20120128118
    Abstract: An x-ray system to generate x-ray image data of a predefined volume segment of an examination subject has either an arc-shaped mount or an annular gantry, an x-ray emitter arrangement with multiple x-ray microemitters, an x-ray detector arrangement with multiple x-ray pixels arranged directly adjacent to one another, and a controller to activate the x-ray emitter arrangement and the x-ray detector arrangement. The x-ray emitter arrangement and the x-ray detector are situated opposite one another on the arc-shaped mount or the gantry. The x-ray system is designed for introduction of the examination subject between the x-ray emitter arrangement and the x-ray detector.
    Type: Application
    Filed: November 22, 2011
    Publication date: May 24, 2012
    Inventors: Rainer Graumann, Volker Heer
  • Patent number: 8180017
    Abstract: A computed tomography apparatus (10) includes spaced radiation sources (82, 84), such as anodes, which each propagate a cone-beam of radiation (40, 50) into an examination region (14). A detector (22) detects radiation which has passed through the examination region. An attenuation system (55) interposed between the radiation sources and the examination region for cone-angle dependent filtering of the cone beams. The attenuation system allows rays which contribute little to a reconstructed image to be attenuated more than rays which contribute more.
    Type: Grant
    Filed: December 12, 2008
    Date of Patent: May 15, 2012
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Peter Forthmann, Roland Proksa, Axel Thran
  • Patent number: 8164064
    Abstract: A computerized system for locating a device including a sensor module and a processor. A radioactive source, associated with the device, produces a signal in the form of radioactive disintegrations. The sensor module includes a radiation detector capable of receiving a signal from the source attached to the device. The sensor module produces an output signal. The processor receives output signal(s) and translates output into information relating to a position of source.
    Type: Grant
    Filed: November 18, 2010
    Date of Patent: April 24, 2012
    Assignee: Navotek Medical Ltd.
    Inventors: Giora Kornblau, Shlomi Ben-Ari
  • Publication number: 20120087464
    Abstract: Some embodiments include a low-dose CT apparatus. Such an apparatus can comprise a plurality of x-ray sources disposed on a gantry and spaced apart along a z-axis. The sources may be configured to produce substantially overlapping fan beams, wherein overlap is substantially complete at a detector surface. Some embodiments also include a controller in electronic communication with the plurality of x-ray sources. The controller may be adapted to switch the plurality of x-ray sources between on and off states such that only one x-ray source is in an on state at any time. Furthermore, the controller circuit may be in electronic communication with at least one x-ray detector and may be adapted to synchronize the x-ray detector with the plurality of x-ray sources such that detected x-rays can be matched to an x-ray source.
    Type: Application
    Filed: October 9, 2011
    Publication date: April 12, 2012
    Applicant: FMI TECHNOLOGIES, INC.
    Inventors: William K. McCroskey, Timothy W. Milliff, Christ H. Heipp
  • Patent number: 8155272
    Abstract: In one aspect, an x-ray scanning device is provided. The x-ray scanning device comprises a target adapted to convert electron-beam (e-beam) energy into x-ray energy, a detector array positioned to detect at least some x-rays emitted from the target, and a conveyer mechanism adapted to convey items to be inspected through an inspection region formed by the target and the detector array, wherein the target and the detector array are rotated out of alignment with each other such that x-rays emitted from the target impinge on diametrically positioned detectors of the detector array without passing through near-side detectors of the detector array.
    Type: Grant
    Filed: August 14, 2008
    Date of Patent: April 10, 2012
    Assignee: L-3 Communications Security and Detection Systems Inc.
    Inventors: Richard Franklin Eilbert, Boris Oreper, Nikolay Rolshud
  • Patent number: 8155262
    Abstract: Methods, systems, and computer program products for multiplexing computed tomography are disclosed. According to one aspect, the subject matter described herein can include illuminating an object with a plurality of x-ray beams from a plurality of viewing angles, wherein each x-ray beam has a distinct waveform; detecting the x-ray intensities of the plurality of pulsed x-ray beams as a function of time, and extracting individual projection image data from the detected x-ray intensities based on the distinct waveforms of the x-ray beams for combining the projection image data to generate three-dimensional tomographic image data of the object.
    Type: Grant
    Filed: September 22, 2006
    Date of Patent: April 10, 2012
    Assignees: The University of North Carolina at Chapel Hill, Xintek, Inc.
    Inventors: Otto Z. Zhou, Jianping Lu, Jian Zhang, Guang Yang, Yueh Lee, Qi Qiu, Yuan Cheng
  • Publication number: 20120082289
    Abstract: At least one embodiment of the invention relates to a dual-source CT device with two focus-detector systems arranged on a gantry offset at an angle n and at least one embodiment relates to a method for spiral scanning and for the reconstruction of tomographic image data of a patient. In at least one embodiment, the detectors have a different z-width in the system axis direction and a computer system with a program memory with at least one computer program, by which during operation the dual-source CT device controls a spiral scanning of a patient and CT-image data is reconstructed from absorption data obtained from both unequally wide detectors, wherein in particular a spiral is controlled with a couch feed rate per rotation, which is greater than the maximum couch feed rate possible with the narrower detector.
    Type: Application
    Filed: September 30, 2011
    Publication date: April 5, 2012
    Applicant: SIEMENS AKTIENGESELLSCHAFT
    Inventor: Thomas Flohr
  • Publication number: 20120082290
    Abstract: A method is disclosed for CT scanning a heart with a dual-source CT device including detectors of different widths in a system axis direction and for reconstruction of tomographic image data. In at least one embodiment, at least two circular scans are performed at different z positions and the spacing in the z direction is chosen such that at least two first scan zones are produced which are scanned by way of a circular scan with two detectors and at least one second scan zone is produced which is scanned twice by one detector in two successive circular scans, wherein a dual-source reconstruction is performed in the first scan zones and a two-segment reconstruction is performed in the at least one second scan zone and finally a common tomographic image data set is produced. Further, at least one embodiment is directed to a dual-source CT device in which the detectors have different widths in the system axis direction.
    Type: Application
    Filed: September 30, 2011
    Publication date: April 5, 2012
    Applicant: SIEMENS AKTIENGESELLSCHAFT
    Inventor: Thomas Flohr
  • Patent number: 8139709
    Abstract: Certain embodiments provide staggered circular scans for CT imaging. In certain embodiments, a CT imaging system comprises a plurality of source-detector assemblies that are axially offset from one another and rotate about a rotation axis to provide staggered circular CT scanning.
    Type: Grant
    Filed: September 15, 2009
    Date of Patent: March 20, 2012
    Assignee: University of Utah Research Foundation
    Inventor: Frederic Noo
  • Publication number: 20120063565
    Abstract: A method is proposed for collimating an off-center sub-object of an examination subject by a collimator of an X-ray diagnostic apparatus. The apparatus has a computed tomography imaging system having a first X-ray source and a computed tomography X-ray detector disposed opposite the first X-ray source having a number of individual detectors and an angiographic imaging system having a second X-ray source offset to the first X-ray source and a flat panel X-ray detector disposed opposite the second X-ray source with matrix shaped pixel elements. A 3D image of the subject is taken by the CT imaging system. The off-center sub-object is selected based on the 3D image. The position of the sub-object is determined for a shooting position of the angiographic imaging system according to the fixed relative disposition between the angiographic imaging system and the CT imaging system. The collimator is adjusted accordingly for collimating the off-center section.
    Type: Application
    Filed: September 2, 2011
    Publication date: March 15, 2012
    Inventor: Klaus Klingenbeck
  • Patent number: 8130906
    Abstract: A breast radiation imaging and therapy apparatus for performing radiation imaging of a breast and having a therapy function of applying radiation to an affected part in the breast. The apparatus includes: (i) a table formed with an opening for allowing a breast of an examinee to pass through; (ii) an imaging unit including a first radiation generating unit for applying an imaging radiation beam and a radiation detecting unit for detecting the radiation beam to output detection signals; (iii) a therapy unit including a second radiation generating unit for applying a therapeutic radiation beam, the second radiation generating unit being movable in a tangential direction of a rotational track around a rotational axis and movable in a direction substantially orthogonal to the table; and (iv) at least one rotational driving device for rotating the imaging unit and the therapy unit around the rotational axis.
    Type: Grant
    Filed: September 11, 2009
    Date of Patent: March 6, 2012
    Assignee: Fujifilm Corporation
    Inventor: Tomonari Sendai
  • Patent number: 8102963
    Abstract: A CT scanner includes a first X-ray beam source, and a second X-ray beam source. With such an apparatus, first source is used to monitor buildup of an injected contrast agent in a selected region of interest relative to a patient and at least the second source is used to perform diagnostic scanning when the buildup of the contrast agent reaches a desired level.
    Type: Grant
    Filed: April 6, 2009
    Date of Patent: January 24, 2012
    Assignee: Arineta Ltd.
    Inventors: Olga Shapiro, David Ruimi, Rafi Brada, Ehud Dafni
  • Publication number: 20120014501
    Abstract: The present invention pertains to an apparatus and method for delivering radiation to a human patient or other mammal. A scanning electron beam x-ray source is used and the detector can be a photon counting detector. The area of the detector is less than the area of field of view in the patient. Tomosynthesis can be used to generate images and images can be produced rapidly in real time.
    Type: Application
    Filed: July 15, 2011
    Publication date: January 19, 2012
    Inventors: Norbert Joseph Pelc, Rebecca Fahrig, Joseph Anthony Heanue, Edward Gerald Solomon, Brian Patrick Wilfley
  • Publication number: 20120008735
    Abstract: Systems, methods, and related computer program products for medical imaging and image-guided radiation treatment (IGRT) are described. In one embodiment, an IGRT system selectively integrates x-ray source arrays, dual-energy imaging, stereoscopic imaging, static and dynamic source collimation, and/or inverse geometry tomosynthesis imaging to acquire and/or track a target during radiation treatment. Advantages include reduced patient x-ray dose and/or reduced treatment delivery margins.
    Type: Application
    Filed: June 8, 2011
    Publication date: January 12, 2012
    Applicant: ACCURAY, INC.
    Inventors: Calvin R. Maurer, Mu Young Lee, Gopinath Kuduvalli, Petr Jordan, Prashant Chopra