Patents by Inventor William J. Sehnert

William J. Sehnert 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: 9131913
    Abstract: A method for displaying a sequence of fluoroscopic images of a subject defines, within the image area of a digital image receiver and in response to one or more viewer instructions, a region of interest and a background region that lies outside the defined region of interest. A succession of fluoroscopic images is obtained from the digital image receiver and, for image pixels within each of the succession of fluoroscopic images, background region pixel data are encoded and transmitted to the display apparatus using a lossy encoding. Region of interest pixel data is transmitted to the display apparatus using a lossless encoding. The succession of fluoroscopic images is displayed.
    Type: Grant
    Filed: June 14, 2012
    Date of Patent: September 15, 2015
    Assignee: Carestream Health, Inc.
    Inventors: William J. Sehnert, David H. Foos
  • Publication number: 20150223767
    Abstract: A method for defining the shape of a radiation beam that is directed toward a subject and to a free-standing imaging detector detects the position and orientation of the imaging detector relative to a radiation source, then adjusts an aperture that lies in the path of the radiation beam to shape the beam for incidence on a predetermined area of the detector according to the detected imaging detector position. The radiation source is energized to emit the shaped radiation beam and the image data about the subject is acquired from the imaging detector.
    Type: Application
    Filed: October 1, 2013
    Publication date: August 13, 2015
    Applicant: Carestream Health, Inc.
    Inventors: William J. Sehnert, Samuel Richard, John Yorkston, Xiaohui Wang
  • Patent number: 8845190
    Abstract: A method for obtaining a radiographic image, the method executed at least in part on a computer, generates a first exposure and acquires image data from the first exposure as a first component image. A second exposure is generated using one or more parameters that are adjusted according to an image quality characteristic of the acquired image data from the first exposure. Image data is acquired from the second exposure as a second component image. One or more additional exposures are generated and an additional component image acquired with each additional exposure. A composite image is formed by combining image data content from the first and second component images and the one or more additional component images.
    Type: Grant
    Filed: October 4, 2011
    Date of Patent: September 30, 2014
    Assignee: Carestream Health, Inc.
    Inventors: David H. Foos, Xiaohui Wang, William J. Sehnert
  • Publication number: 20130342577
    Abstract: Embodiments of methods and/or apparatus can allow a viewing practitioner to adjust how image content can combined from multiple radiographic images of the same subject or different image processing of one image of a subject to control additional information gained by the combination and/or for improved diagnosis. In one embodiment, a method for displaying radiographic image content is executed at least in part by a computer and can include obtaining image data for a first radiographic image of a patient; obtaining image data for a second radiographic image of a patient; combining the image data from the first and second images and displaying the result as a combined radiographic image; recombining the image data from the first and second images according to a viewer instruction that conditions how the first and second images are recombined and re-displaying the result as the combined radiographic image.
    Type: Application
    Filed: June 20, 2013
    Publication date: December 26, 2013
    Inventors: Xiaohui Wang, William J. Sehnert, Carl R. Wesolowski
  • Publication number: 20130336445
    Abstract: A method for acquiring a sequence of fluoroscopic images of a subject acquires and displays a basis image from a fluoroscopic imaging system. A region of interest is defined within the displayed basis image in response to one or more viewer instructions entered on the displayed basis image. One or more signals are generated that adjust the position of one or more components of the fluoroscopic imaging system according to the one or more viewer instructions.
    Type: Application
    Filed: September 10, 2012
    Publication date: December 19, 2013
    Inventors: William J. Sehnert, Xiaohui Wang, Samuel Richard
  • Publication number: 20130336552
    Abstract: A method for displaying a sequence of fluoroscopic images of a subject defines, within the image area of a digital image receiver and in response to one or more viewer instructions, a region of interest and a background region that lies outside the defined region of interest. A succession of fluoroscopic images is obtained from the digital image receiver and, for image pixels within each of the succession of fluoroscopic images, background region pixel data are encoded and transmitted to the display apparatus using a lossy encoding. Region of interest pixel data is transmitted to the display apparatus using a lossless encoding. The succession of fluoroscopic images is displayed.
    Type: Application
    Filed: June 14, 2012
    Publication date: December 19, 2013
    Inventors: William J. Sehnert, David H. Foos
  • Patent number: 8571290
    Abstract: A method for determining image quality of a digital radiographic image. The method is executed at least in part by a computer system. The method obtains image data for the digital radiographic image, identifies one or more regions of interest in the digital radiographic image, derives an image quality score that indicates the image quality of the digital radiographic image by computing at least a contrast-to-noise value for image data content within the one or more regions of interest, and reports the derived image quality score for the image.
    Type: Grant
    Filed: June 17, 2009
    Date of Patent: October 29, 2013
    Assignee: Carestream Health, Inc.
    Inventors: Xiaohui Wang, Hui Luo, David H. Foos, William J. Sehnert
  • Patent number: 8433154
    Abstract: A method for rendering a radiographic image of a subject. Image data is obtained from an image detector and a look-up table is generated for image data processing, wherein the look-up table is generated at least according to information about an image type, an image detector type, and a kVp setting used to expose the radiographic image and according to information about grid use. Image data values of the obtained image data are adjusted according to the generated look-up table to generate adjusted radiographic image data. Log conversion and image processing are applied to the adjusted radiographic image data to form enhanced radiographic image data. The enhanced radiographic image data are rendered on a display.
    Type: Grant
    Filed: December 13, 2010
    Date of Patent: April 30, 2013
    Assignee: Carestream Health, Inc.
    Inventor: William J. Sehnert
  • Publication number: 20120148156
    Abstract: A method for rendering a radiographic image of a subject. Image data is obtained from an image detector and a look-up table is generated for image data processing, wherein the look-up table is generated at least according to information about an image type, an image detector type, and a kVp setting used to expose the radiographic image and according to information about grid use. Image data values of the obtained image data are adjusted according to the generated look-up table to generate adjusted radiographic image data. Log conversion and image processing are applied to the adjusted radiographic image data to form enhanced radiographic image data. The enhanced radiographic image data are rendered on a display.
    Type: Application
    Filed: December 13, 2010
    Publication date: June 14, 2012
    Inventor: William J. Sehnert
  • Publication number: 20120087474
    Abstract: A method for obtaining a radiographic image, the method executed at least in part on a computer, generates a first exposure and acquires image data from the first exposure as a first component image. A second exposure is generated using one or more parameters that are adjusted according to an image quality characteristic of the acquired image data from the first exposure. Image data is acquired from the second exposure as a second component image. One or more additional exposures are generated and an additional component image acquired with each additional exposure. A composite image is formed by combining image data content from the first and second component images and the one or more additional component images.
    Type: Application
    Filed: October 4, 2011
    Publication date: April 12, 2012
    Inventors: David H. Foos, Xiaohui Wang, William J. Sehnert
  • Patent number: 8131051
    Abstract: A method for automatically modifying the rendering of an image based on an analysis of pixel values within a selected region of interest. The method includes: providing a digital input image of digital pixel values and tone scale look-up table (LUT); creating a default rendered image by applying the tone scale lookup table to the input image; displaying the default rendered image; selecting a region of interest from the input image; computing the histogram of the pixel values within the region of interest; creating a bright light image by remapping the pixel values within the region of interest based on an analysis of the histogram and the tone scale table.
    Type: Grant
    Filed: June 24, 2011
    Date of Patent: March 6, 2012
    Assignee: Carestream Health, Inc.
    Inventors: Michael D. Heath, William J. Sehnert
  • Patent number: 8055052
    Abstract: A method of reducing artifacts in a digital radiographic image identifies either a row or column direction for the artifacts in the image data as a predominant direction and obtains a measurement of the image data frequency content that is subject to artifacts from the image content according to the predominant direction. The measurement of image data frequency content subject to the artifacts is tested according to a predetermined threshold. Artifacts are reduced when the predetermined threshold is exceeded by generating one or more suppression factors according to the testing results, decomposing the image content into at least two frequency bands in each row and column direction, applying the one or more suppression factors to modify at least one of the frequency bands, and recomposing the image content by recombining the at least one modified frequency band with one or more other bands into which the image had been decomposed.
    Type: Grant
    Filed: December 22, 2008
    Date of Patent: November 8, 2011
    Assignee: Carestream Health, Inc.
    Inventors: Peter D. Burns, William J. Sehnert, Richard T. Scott
  • Publication number: 20110255766
    Abstract: A method for automatically modifying the rendering of an image based on an analysis of pixel values within a selected region of interest. The method includes: providing a digital input image of digital pixel values and tone scale look-up table (LUT); creating a default rendered image by applying the tone scale lookup table to the input image; displaying the default rendered image; selecting a region of interest from the input image; computing the histogram of the pixel values within the region of interest; creating a bright light image by remapping the pixel values within the region of interest based on an analysis of the histogram and the tone scale table.
    Type: Application
    Filed: June 24, 2011
    Publication date: October 20, 2011
    Inventors: Michael D. Heath, William J. Sehnert
  • Publication number: 20110110496
    Abstract: A method for processing a radiographic image of a patient, executed at least in part on a host processor, initiates exposure in response to an instruction entered from an operator console and obtains radiographic image data from a digital detector that is subjected to the exposure. The obtained radiographic image data is analyzed according to a set of predefined criteria for diagnostic suitability of the image. One or more results of the diagnostic suitability analysis at the operator console is indicated and a listing of one or more corrective actions at the operator console according to the indicated results is provided.
    Type: Application
    Filed: December 14, 2010
    Publication date: May 12, 2011
    Inventors: David H. Foos, William J. Sehnert, Zhimin Huo, Hui Luo, Xiaohui Wang
  • Patent number: 7899229
    Abstract: A method for detecting one or more motion effects in a diagnostic image obtains image data for the diagnostic image and identifies at least one region of interest in the diagnostic image. The probability of motion blur within the at least one region of interest is calculated according to a motion-sensitive feature of the at least one region of interest. The calculated probability for motion blur within the at least one region of interest is reported.
    Type: Grant
    Filed: August 6, 2007
    Date of Patent: March 1, 2011
    Inventors: Hui Luo, William J. Sehnert, Jacquelyn S. Ellinwood
  • Publication number: 20100119140
    Abstract: A method of reducing artifacts in a digital radiographic image identifies either a row or column direction for the artifacts in the image data as a predominant direction and obtains a measurement of the image data frequency content that is subject to artifacts from the image content according to the predominant direction. The measurement of image data frequency content subject to the artifacts is tested according to a predetermined threshold. Artifacts are reduced when the predetermined threshold is exceeded by generating one or more suppression factors according to the testing results, decomposing the image content into at least two frequency bands in each row and column direction, applying the one or more suppression factors to modify at least one of the frequency bands, and recomposing the image content by recombining the at least one modified frequency band with one or more other bands into which the image had been decomposed.
    Type: Application
    Filed: December 22, 2008
    Publication date: May 13, 2010
    Inventors: Peter D. Burns, William J. Sehnert, Richard T. Scott
  • Publication number: 20100086189
    Abstract: A method for determining image quality of a digital radiographic image. The method is executed at least in part by a computer system. The method obtains image data for the digital radiographic image, identifies one or more regions of interest in the digital radiographic image, derives an image quality score that indicates the image quality of the digital radiographic image by computing at least a contrast-to-noise value for image data content within the one or more regions of interest, and reports the derived image quality score for the image.
    Type: Application
    Filed: June 17, 2009
    Publication date: April 8, 2010
    Inventors: Xiaohui Wang, Hui Luo, David H. Foos, William J. Sehnert
  • Publication number: 20090041305
    Abstract: A method for detecting one or more motion effects in a diagnostic image obtains image data for the diagnostic image and identifies at least one region of interest in the diagnostic image. The probability of motion blur within the at least one region of interest is calculated according to a motion-sensitive feature of the at least one region of interest. The calculated probability for motion blur within the at least one region of interest is reported.
    Type: Application
    Filed: August 6, 2007
    Publication date: February 12, 2009
    Inventors: Hui Luo, William J. Sehnert, Jacquelyn S. Ellinwood
  • Publication number: 20080089602
    Abstract: A method for automatically modifying the rendering of an image based on an analysis of pixel values within a selected region of interest. The method includes: providing a digital input image of digital pixel values and tone scale look-up table (LUT); creating a default rendered image by applying the tone scale lookup table to the input image; displaying the default rendered image; selecting a region of interest from the input image; computing the histogram of the pixel values within the region of interest; creating a bright light image by remapping the pixel values within the region of interest based on an analysis of the histogram and the tone scale table; wherein the tone scale lookup table has been adjusted by one or more of increasing or decreasing the overall contrast, and of reversing the polarity of the tone scale LUT; and overlaying the bright light image on default rendered image.
    Type: Application
    Filed: October 17, 2006
    Publication date: April 17, 2008
    Inventors: Michael D. Heath, William J. Sehnert