Patents by Inventor John Tkaczyk

John Tkaczyk has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20190059827
    Abstract: A system for imaging a subject is provided. The system includes a radiation source, a radiation detector, and a controller. The radiation source is operative to transmit electromagnetic rays through the subject while the radiation source travels along a path defined by a sweep angle that is less than 365 degrees. The radiation detector is operative to receive the electromagnetic rays after having passed through the subject. The controller is operative to: acquire preliminary data regarding the subject from a sensor; determine an imaging parameter from the preliminary data; and acquire one or more images of the subject via the radiation source and the radiation detector based at least in part on the imaging parameter.
    Type: Application
    Filed: August 24, 2017
    Publication date: February 28, 2019
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: KATELYN ROSE NYE, GIREESHA RAO, JOHN SABOL, JOHN TKACZYK
  • Publication number: 20080304618
    Abstract: A CT detector capable of energy discrimination and direct conversion is disclosed. The detector includes multiple layers of semiconductor material with the layers having varying thicknesses. The detector is constructed to be segmented in the x-ray penetration direction so as to optimize count rate performance as well as avoid saturation. The detector also includes variable pixel pitch and a flexible binning of pixels to further enhance count rate performance.
    Type: Application
    Filed: August 19, 2008
    Publication date: December 11, 2008
    Inventors: David M. Hoffman, James LeBlanc, John Tkaczyk, Robert F. Senzig, Yanfeng Du
  • Publication number: 20070248209
    Abstract: A CT detector capable of energy discrimination and direct conversion is disclosed. The detector includes multiple layers of semiconductor material with the layers having varying thicknesses. The detector is constructed to be segmented in the x-ray penetration direction so as to optimize count rate performance as well as avoid saturation. The detector also includes variable pixel pitch and a flexible binning of pixels to further enhance count rate performance.
    Type: Application
    Filed: June 26, 2007
    Publication date: October 25, 2007
    Inventors: David Hoffman, James LeBlanc, John Tkaczyk, Robert Senzig, Yanfeng Du
  • Publication number: 20070205367
    Abstract: A system is presented. The system includes a plurality of energy integrating detector elements configured to acquire energy integrating data. Further, the system includes a plurality of energy discriminating detector elements configured to acquire energy discriminating data, where the plurality of energy integrating detector elements and the plurality of energy discriminating detector elements are arranged in a spatial relationship to form a hybrid detector, and where the plurality of energy integrating detector elements and the plurality of energy discriminating detector elements are configured to obtain respective sets of energy integrating data and energy discriminating data for use in generating an image.
    Type: Application
    Filed: March 1, 2006
    Publication date: September 6, 2007
    Inventors: Bruno Deman, Peter Edic, James Leblanc, John Tkaczyk, Jonathan Short
  • Publication number: 20070206721
    Abstract: A CT detector includes a first detector configured to convert radiographic energy to electrical signals representative of energy sensitive radiographic data and a second detector configured to convert radiographic energy to electrical signals representative of energy sensitive radiographic data and positioned to receive x-rays that pass through the first detector. A logic controller is electrically connected to the first detector and the second detector and is configured to receive a logic output signal from the second detector indicative of an amount of a saturation level of the first detector, compare the logic output signal to a threshold value, and output, based on the comparison, electrical signals from the first detector, the second detector, or a combination thereof to an image chain.
    Type: Application
    Filed: May 4, 2007
    Publication date: September 6, 2007
    Inventors: John Tkaczyk, Jonathan Short, James Rose, Xiaoye Wu, Samit Basu
  • Publication number: 20070206722
    Abstract: A CT detector capable of energy discrimination and direct conversion is disclosed. The detector includes multiple layers of semiconductor material with the layers having varying thicknesses. The detector is constructed to be segmented in the x-ray penetration direction so as to optimize count rate performance as well as avoid saturation. The detector also includes variable pixel pitch and a flexible binning of pixels to further enhance count rate performance.
    Type: Application
    Filed: May 8, 2007
    Publication date: September 6, 2007
    Inventors: David Hoffman, James LeBlanc, John Tkaczyk, Robert Senzig, Yanfeng Du
  • Patent number: 7260174
    Abstract: A CT detector capable of energy discrimination and direct conversion is disclosed. The detector includes multiple layers of semiconductor material with the layers having varying thicknesses. The detector is constructed to be segmented in the x-ray penetration direction so as to optimize count rate performance as well as avoid saturation. The detector also includes variable pixel pitch and a flexible binning of pixels to further enhance count rate performance.
    Type: Grant
    Filed: September 13, 2004
    Date of Patent: August 21, 2007
    Assignee: General Electric Company
    Inventors: David M. Hoffman, James LeBlanc, John Tkaczyk, Robert F. Senzig, Yanfeng Du
  • Publication number: 20070140418
    Abstract: A CT detector capable of energy discrimination and direct conversion is disclosed. The detector includes multiple layers of semiconductor material with the layers having varying thicknesses. The detector is constructed to be segmented in the x-ray penetration direction so as to optimize count rate performance as well as avoid saturation. The detector also includes variable pixel pitch and a flexible binning of pixels to further enhance count rate performance.
    Type: Application
    Filed: February 22, 2007
    Publication date: June 21, 2007
    Inventors: David Hoffman, James LeBlanc, John Tkaczyk, Robert Senzig, Yanfeng Du
  • Publication number: 20070120062
    Abstract: Briefly, in accordance with one or more embodiments, count rates may be obtained from one or more subpixels for a given pixel in an imaging system detector. Count rates may be obtained from individual subpixels, or may be from electronically binned subpixels at least in part in various subpixel arrangements where a selected subpixel arrangement may be adaptively set according to a detected count rate. For lower count rates, two or more subpixels may be electronically binned together and the counts may be obtained from the binned subpixels, for example to mitigate a charge sharing effect. For higher count rates, the count rates of a greater number of subpixels may be individually obtained, for example to mitigate a pulse pile-up effect. Detective quantum efficiency may be optimized over a wider range of photon flux rate via the adaptive subpixel arrangement.
    Type: Application
    Filed: November 30, 2005
    Publication date: May 31, 2007
    Inventors: Wen Li, John Tkaczyk, Yanfeng Du, James Leblanc
  • Publication number: 20070114426
    Abstract: X-ray detector system 18 with improved spatial resolution for a computed tomography systems is provided. Detector system 18 may include pairs of first and second detector arrays 50 and 52, with each array containing detector elements of a different design. In one embodiment, the first array 50 may comprise a first, relatively thin and continuous (i.e., monolithic) scintillation layer 70 with an array of individual diodes 74 positioned to receive light generated within the scintillation layer 70. The second array may comprise a second, relatively thick scintillation layer 80 formed of separate scintillator elements 82. An array of diodes 86 may be positioned to receive radiation from the scintillation layer 80 such that each diode element 82 is aligned to primarily receive radiation from one scintillator element 82 in the layer 80. The structural arrangements of the detector system may also be adapted for applications involving direct conversion of x-ray energy.
    Type: Application
    Filed: November 22, 2005
    Publication date: May 24, 2007
    Inventor: John Tkaczyk
  • Publication number: 20070116173
    Abstract: An adaptive CT data acquisition system and technique is presented whereby radiation emitted for CT data acquisition is dynamically controlled to limit exposure to those detectors of a CT detector assembly that may be particularly susceptible to saturation during a given data acquisition. The data acquisition technique recognizes that for a given subject size and position that pre-subject filtering and collimating of a radiation beam may be insufficient to completely prevent detector saturation. Therefore, the present invention includes implementation of a number of CT data correction techniques for correcting otherwise unusable data of a saturated CT detector. These data correction techniques include a nearest neighbor correction, off-centered phantom correction, off-centered synthetic data correction, scout data correction, planar radiogram correction, and a number of others.
    Type: Application
    Filed: January 25, 2007
    Publication date: May 24, 2007
    Inventors: Jerome Arenson, Evgeny Drapkin, Yanfeng Du, Lev Greenberg, Oded Meirav, David Ruimi, John Tkaczyk, Xiaoye Wu
  • Publication number: 20070076848
    Abstract: A method of scanning a subject to be imaged is presented. The method includes acquiring projection data from a first region of a pixel, where the first region has a first area. Additionally, the method includes acquiring projection data from a second region of the pixel, where the second region has a second area. The method also includes combining projection data from the first and second regions to obtain composite projection data for the pixel. Computer-readable medium and systems that afford functionality of the type defined by this method are also contemplated in conjunction with the present technique.
    Type: Application
    Filed: September 30, 2005
    Publication date: April 5, 2007
    Inventors: Deborah Walter, John Tkaczyk, Yanfeng Du
  • Publication number: 20070076842
    Abstract: A method of enhancing image quality and providing tissue composition information by analysis of energy discrimination data, the method comprising determining a radiation dosage at one or more energy spectrum levels based on patient parameters and user selected parameters. Computer-readable medium and systems that afford functionality of the type defined by this method are also contemplated in conjunction with the present technique.
    Type: Application
    Filed: September 30, 2005
    Publication date: April 5, 2007
    Inventors: John Tkaczyk, Deborah Walter, Yanfeng Du, David Hoffman, Thomas Toth
  • Publication number: 20070003006
    Abstract: A computed tomography detector module is presented. The detector module includes a substrate having a topside and a bottom side. Additionally, the detector module includes a plurality of detector layers disposed on the top side of the substrate in a direction that is substantially orthogonal to the substrate, where each of the plurality of detector layers comprises a direct conversion material configured to absorb radiation, and where each of the plurality of detector layers comprises a first side and a second side. Further, the detector module includes a plurality of pixelated anode contacts is disposed on the first side of each of the plurality of detector layers. Also, the detector module includes a common cathode contact is disposed on the second side of each of the plurality of detector layers.
    Type: Application
    Filed: June 29, 2005
    Publication date: January 4, 2007
    Inventors: John Tkaczyk, James Leblanc, Wen Li, Deborah Walter, Yanfeng Du
  • Publication number: 20060109950
    Abstract: An adaptive CT data acquisition system and technique is presented whereby radiation emitted for CT data acquisition is dynamically controlled to limit exposure to those detectors of a CT detector assembly that may be particularly susceptible to saturation during a given data acquisition. The data acquisition technique recognizes that for a given subject size and position that pre-subject filtering and collimating of a radiation beam may be insufficient to completely prevent detector saturation. Therefore, the present invention includes implementation of a number of CT data correction techniques for correcting otherwise unusable data of a saturated CT detector. These data correction techniques include a nearest neighbor correction, off-centered phantom correction, off-centered synthetic data correction, scout data correction, planar radiogram correction, and a number of others.
    Type: Application
    Filed: November 24, 2004
    Publication date: May 25, 2006
    Inventors: Jerome Arenson, John Tkaczyk, David Ruimi, Oded Meirav, Evgeny Drapkin, Dmitry Samsonov, Lev Greenberg, Bruno De Man, Samit Basu, Xiaoye Wu, Yangeng Du
  • Publication number: 20060092615
    Abstract: An interconnect structure for use in an electronic device, wherein the interconnect structure comprises a first substrate comprising a flexible material, wherein the first substrate comprises a front side and a back side, and wherein the first substrate is configured to receive a sensor on the front side; and a second substrate coupled to the back side of the first substrate and comprising a rigid material. A detector module for use in an imaging system comprises the aforementioned interconnect structure.
    Type: Application
    Filed: October 28, 2004
    Publication date: May 4, 2006
    Inventors: William Burdick, James Rose, John Tkaczyk, Oded Meirav, Jerome Arenson, David Hoffman
  • Publication number: 20060056581
    Abstract: A CT detector capable of energy discrimination and direct conversion is disclosed. The detector includes multiple layers of semiconductor material with the layers having varying thicknesses. The detector is constructed to be segmented in the x-ray penetration direction so as to optimize count rate performance as well as avoid saturation. The detector also includes variable pixel pitch and a flexible binning of pixels to further enhance count rate performance.
    Type: Application
    Filed: September 13, 2004
    Publication date: March 16, 2006
    Inventors: David Hoffman, James LeBlanc, John Tkaczyk, Robert Senzig, Yanfeng Du
  • Publication number: 20060023832
    Abstract: Various configurations for scatter reduction and control are provided for CT imaging. These configurations include an imaging system having a stationary detector extending generally around a portion of an imaging volume and a distributed X-ray source placed proximal to the stationary detector for radiating an X-ray beam toward the stationary detector. A scatter control system is further provided that is configured to adaptively operate in cooperation with the stationary detector and the distributed X-ray source to focally align collimator septa contained therein to the X-ray beam at a given focal point and to provide X-ray beam scatter control.
    Type: Application
    Filed: July 29, 2004
    Publication date: February 2, 2006
    Inventors: Peter Edic, Bruno Bernard De Man, Mark Vermilyea, Christopher Unger, John Tkaczyk, James LeBlanc, Samit Basu, William Ross, Jonathan Short, Scott Zelakiewicz
  • Publication number: 20050286682
    Abstract: A detector module for use in an imaging system is provided. The detector comprises at least one sensor array configured for receiving X-ray signals and converting the X-ray signals to corresponding electrical signals, at least one electronic device configured for converting the electrical signals to a corresponding digital signal and a switching circuit coupling the sensor array and the electronic device, wherein the switching circuit is configured for routing the electrical signals from the sensor array to the electronic device.
    Type: Application
    Filed: June 29, 2004
    Publication date: December 29, 2005
    Inventors: John Tkaczyk, William Burdick, Naresh Rao
  • Publication number: 20050084069
    Abstract: A method for analyzing materials in an object includes acquiring x-ray projection data of the object at high energy and at low energy for a plurality of views. The acquired x-ray projection data is utilized in a material decomposition to determine material densities at each pixel for two selected basis materials. A composition of an object at each pixel is determined utilizing a determined mapping of material density regions for the two selected basis materials. An image indicative of the composition of the object is displayed utilizing the determined composition.
    Type: Application
    Filed: October 16, 2003
    Publication date: April 21, 2005
    Inventors: Yanfeng Du, John Tkaczyk