Patents by Inventor Ralph Allen Hewes

Ralph Allen Hewes 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).

  • Patent number: 6751285
    Abstract: A method for acquiring a plurality of images of an object of interest using a tomosynthesis imaging system. The method includes determining a thickness of an object of interest, and adjusting at least one parameter of an image acquisition process based on the determined thickness.
    Type: Grant
    Filed: November 21, 2001
    Date of Patent: June 15, 2004
    Assignee: General Electric Company
    Inventors: Jeffrey Wayne Eberhard, Bernhard Erich Hermann Claus, Beale Opsahl-Ong, Ralph Allen Hewes
  • Publication number: 20040066904
    Abstract: A radiation imaging system comprises a movable radiation source adapted to be disposed in a plurality of respective radiation source positions; a radiation detector and a collimator assembly configured to displace a collimator in a plurality of respective collimator positions, each of the collimator positions being coordinated with at least one of the radiation source positions such that a radiation beam emanating from the radiation source is collimated to limit radiation incident on the detector to a predetermined exposure area. Another radiation imaging system comprises a movable radiation source; a radiation detector; and a collimator comprising an adjustable geometry aperture assembly configured such that an adjustment of the aperture geometry is synchronized with the movement of the radiation source and coordinated with the radiation source position so as to limit the incident radiation to a predetermined exposure area at the detector.
    Type: Application
    Filed: September 10, 2003
    Publication date: April 8, 2004
    Inventors: Jeffrey Wayne Eberhard, Reinhold Franz Wirth, Bernhard Erich Hermann Claus, Ralph Allen Hewes, Harold John Jenkins
  • Patent number: 6647092
    Abstract: A radiation imaging system comprises a movable radiation source adapted to be disposed in a plurality of respective radiation source positions; a radiation detector and a collimator assembly configured to displace a collimator in a plurality of respective collimator positions, each of the collimator positions being coordinated with at least one of the radiation source positions such that a radiation beam emanating from the radiation source is collimated to limit radiation incident on the detector to a predetermined exposure area. Another radiation imaging system comprises a movable radiation source; a radiation detector; and a collimator comprising an adjustable geometry aperture assembly configured such that an adjustment of the aperture geometry is synchronized with the movement of the radiation source and coordinated with the radiation source position so as to limit the incident radiation to a predetermined exposure area at the detector.
    Type: Grant
    Filed: January 18, 2002
    Date of Patent: November 11, 2003
    Assignee: General Electric Company
    Inventors: Jeffrey Wayne Eberhard, Reinhold Franz Wirth, Bernhard Erich Hermann Claus, Ralph Allen Hewes, Harold John Jenkins, Jr.
  • Publication number: 20030138078
    Abstract: A radiation imaging system comprises a movable radiation source adapted to be disposed in a plurality of respective radiation source positions; a radiation detector and a collimator assembly configured to displace a collimator in a plurality of respective collimator positions, each of the collimator positions being coordinated with at least one of the radiation source positions such that a radiation beam emanating from the radiation source is collimated to limit radiation incident on the detector to a predetermined exposure area. Another radiation imaging system comprises a movable radiation source; a radiation detector; and a collimator comprising an adjustable geometry aperture assembly configured such that an adjustment of the aperture geometry is synchronized with the movement of the radiation source and coordinated with the radiation source position so as to limit the incident radiation to a predetermined exposure area at the detector.
    Type: Application
    Filed: January 18, 2002
    Publication date: July 24, 2003
    Applicant: General Electric Company CRD
    Inventors: Jeffrey Wayne Eberhard, Reinhold Franz Wirth, Bernhard Erich Hermann Claus, Ralph Allen Hewes, Harold John Jenkins
  • Publication number: 20030095624
    Abstract: A method for acquiring a plurality of images of an object of interest using a tomosynthesis imaging system. The method includes determining a thickness of an object of interest, and adjusting at least one parameter of an image acquisition process based on the determined thickness.
    Type: Application
    Filed: November 21, 2001
    Publication date: May 22, 2003
    Inventors: Jeffrey Wayne Eberhard, Bernhard Erich Hermann Claus, Beale Opsahl-Ong, Ralph Allen Hewes
  • Patent number: 6375352
    Abstract: An apparatus and method are provided for obtaining x-ray tomosynthesis data desirable for mammography. The apparatus operates in conjunction with gravity to quickly and smoothly move an x-ray source through a plurality of positions relative to a stationary digital detector and a patient's breast to obtain a plurality x-ray images of the patient's breast which can then be processed for examination by a physician or radiologist. In one embodiment, an actuator such as a hydraulic system is operably connectable to the radiation source to controllably allow the radiation source to move under the influence of gravity from an elevated position to a lower position relative to the digital detector.
    Type: Grant
    Filed: October 1, 1999
    Date of Patent: April 23, 2002
    Assignee: General Electric Company
    Inventors: Ralph Allen Hewes, Mehmet Yavuz
  • Patent number: 5801312
    Abstract: The present invention discloses a method and system for laser ultrasonic imaging an object. In the present invention, a synthetic aperture focusing technique (SAFT) is used to generate a high resolution subsurface images of the object. In addition, the present invention filters low frequency components from detected laser ultrasound waveform data to further enhance resolution, SNR, and contrast. Geometric knowledge permits the present invention to generate images of objects having a complex and arbitrary-shape.
    Type: Grant
    Filed: April 1, 1996
    Date of Patent: September 1, 1998
    Assignee: General Electric Company
    Inventors: Peter William Lorraine, Ralph Allen Hewes, Phillip Randall Staver
  • Patent number: 5760904
    Abstract: The present invention discloses a method and system for inspecting a surface of an object with laser ultrasound. In the present invention, the surface is scanned with a source laser emitting a laser beam at a plurality of scanning positions. The emitted laser beam generates surface or Lamb waves at the plurality of scanning positions and transmits the waves throughout the surface. The surface of the object is scanned with a detector laser emitting a laser beam onto the object surface at the plurality of scanning positions. Surface displacement produced by the waves reflected from the surface is detected with a detector at each scanning position. The detected displacement at each scanning position contains signals representing a laser ultrasound waveform data set corresponding to a two-dimensional surface region along the object. The laser ultrasound waveform data sets at each scanning position are processed with a synthetic aperture focusing technique in order to generate high resolution images.
    Type: Grant
    Filed: July 26, 1996
    Date of Patent: June 2, 1998
    Assignee: General Electric Company
    Inventors: Peter William Lorraine, Ralph Allen Hewes