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).

  • Publication number: 20210177371
    Abstract: A mobile radiography apparatus is configured to sparsely sample radiographic projection images to generate high resolution tomosynthesis volume images using a digital radiographic detector that is mechanically uncoupled from the x-ray source and an artificial intelligence network. The artificial intelligence network is trained to correct a volume image generated from sparsely sample projection images to generate the high resolution tomosynthesis volume images.
    Type: Application
    Filed: January 19, 2021
    Publication date: June 17, 2021
    Inventors: Xiaohui WANG, William J. SEHNERT, Levon O. VOGELSANG, David H. FOOS, Yuan LIN
  • Patent number: 11024061
    Abstract: A method for scattered radiation correction acquires radiographic projection image data for a first portion of a subject that lies within a field of view of an imaging apparatus and characterizes the surface contour of the subject that includes at least a second portion of the subject that lies outside the field of view of the imaging apparatus. The surface contour of the subject is characterized according to the reflectance images. The surface contour characterization is registered to the field of view. Scattered radiation is estimated according to the projection image data and the surface contour characterization. The acquired radiographic projection image data is updated according to the estimated scattered radiation. An image of the field of view is displayed according to the conditioned acquired radiographic projection image data.
    Type: Grant
    Filed: September 13, 2019
    Date of Patent: June 1, 2021
    Assignee: Carestream Health, Inc.
    Inventors: Yuan Lin, William J. Sehnert
  • Publication number: 20210113176
    Abstract: A mobile radiography apparatus includes radiopaque markers disposed in a radiation path that extends from an x-ray source to a digital radiographic detector, which detector is mechanically uncoupled from the x-ray source or x-ray sources. A processing system calculates a position of the detector relative to the x-ray source or x-ray sources according to identified marker positions in acquired x-ray projection images, and reconstructs a volume image according to the acquired x-ray projection images.
    Type: Application
    Filed: December 9, 2020
    Publication date: April 22, 2021
    Inventors: William J. SEHNERT, Yuan LIN, Levon O. VOGELSANG
  • Publication number: 20210106304
    Abstract: A mobile radiography apparatus has radio-opaque markers, each marker coupled to a portion of the mobile radiography apparatus, wherein each of the markers is in a radiation path that extends from an x-ray source or x-ray sources. A detector is mechanically uncoupled from the x-ray source or x-ray sources for positioning behind a patient. Processing logic is configured to calculate a detector position with relation to the x-ray source or x-ray sources according to identified marker positions in acquired projection images, and to reconstruct a volume image according to the acquired projection images.
    Type: Application
    Filed: October 28, 2020
    Publication date: April 15, 2021
    Inventors: William J. SEHNERT, Yuan LIN
  • Patent number: 10842462
    Abstract: A mobile radiography apparatus has radio-opaque markers, each marker coupled to a portion of the mobile radiography apparatus, wherein each of the markers is in a radiation path that extends from an x-ray source. A detector is mechanically uncoupled from the x-ray source for positioning behind a patient. Processing logic is configured to calculate a detector position with relation to the x-ray source according to identified marker positions in acquired projection images, and to reconstruct a volume image according to the acquired projection images.
    Type: Grant
    Filed: November 22, 2019
    Date of Patent: November 24, 2020
    Assignee: Carestream Health, Inc.
    Inventors: William J. Sehnert, Yuan Lin
  • Patent number: 10813616
    Abstract: A method rotates a radiation source and a detector over a sequence of acquisition angles about a subject and acquires, at each acquisition angle, a 2D projection image. A simulation subset is formed that contains some, but not all, of the acquired 2D projection images, wherein subset membership is determined according to relative signal change between successive 2D projection images. Scatter is characterized for the acquired sequence of projection images according to the formed simulation subset. One or more of the acquired sequence of projection images is corrected using the scatter characterization. An image volume is reconstructed and stored according to the sequence of scatter corrected projection images. One or more images of the reconstructed image volume are rendered to a display or transmitting the stored image volume data.
    Type: Grant
    Filed: August 21, 2018
    Date of Patent: October 27, 2020
    Assignee: Carestream Health, Inc.
    Inventors: Yuan Lin, William J. Sehnert
  • Patent number: 10758201
    Abstract: A method rotates a radiation source and a detector over a sequence of acquisition angles about a subject and acquires, at each acquisition angle, a 2D projection image. A simulation subset is formed that contains some, but not all, of the acquired 2D projection images, wherein subset membership is determined according to relative signal change between successive 2D projection images. Scatter is characterized for the acquired sequence of projection images according to the formed simulation subset. One or more of the acquired sequence of projection images is corrected using the scatter characterization. An image volume is reconstructed and stored according to the sequence of scatter corrected projection images. One or more images of the reconstructed image volume are rendered to a display or transmitting the stored image volume data.
    Type: Grant
    Filed: August 21, 2018
    Date of Patent: September 1, 2020
    Assignee: Carestream Health, Inc.
    Inventors: Yuan Lin, William J. Sehnert
  • Patent number: 10682113
    Abstract: A position sensor has one or more fiducials formed of radio-opaque material and mounted along a surface of a radio-translucent body. A sensor element is coupled to the radio-translucent body and is spaced apart from the one or more fiducials and is energizable to acquire image content during receipt of exposure energy from an X-ray source to the position sensor. The sensor element is in signal communication with a processor and is energizable to generate data that is indicative of a relative position of the X-ray source. A radio-opaque covering is coupled against an outer surface of the radio-translucent body.
    Type: Grant
    Filed: March 17, 2017
    Date of Patent: June 16, 2020
    Assignee: Carestream Health, Inc.
    Inventors: Yuan Lin, William J. Sehnert
  • Patent number: 10610170
    Abstract: A method acquires reflectance image content from patient anatomy that is within a volume of an imaging apparatus defined between a radiation source and a detector and generates a surface contour image from the acquired reflectance image content. The generated surface contour image is compared with surface contour image metrics stored for the imaging apparatus and a recommended adjustment to the position of the patient anatomy is reported according to the comparison.
    Type: Grant
    Filed: May 4, 2018
    Date of Patent: April 7, 2020
    Assignee: Carestream Health, Inc.
    Inventors: Yuan Lin, William J. Sehnert
  • Patent number: 10605933
    Abstract: A method for X-ray spectral calibration acquires X-ray projections of a calibration phantom formed of known materials. The X-ray spectrum of an X-ray source is calculated according to the acquired X-ray projections. The calculated X-ray spectrum can be stored, transmitted, or displayed.
    Type: Grant
    Filed: May 18, 2017
    Date of Patent: March 31, 2020
    Assignee: Carestream Health, Inc.
    Inventors: Yuan Lin, William J. Sehnert
  • Publication number: 20200093458
    Abstract: A mobile radiography apparatus has radio-opaque markers, each marker coupled to a portion of the mobile radiography apparatus, wherein each of the markers is in a radiation path that extends from an x-ray source. A detector is mechanically uncoupled from the x-ray source for positioning behind a patient. Processing logic is configured to calculate a detector position with relation to the x-ray source according to identified marker positions in acquired projection images, and to reconstruct a volume image according to the acquired projection images.
    Type: Application
    Filed: November 22, 2019
    Publication date: March 26, 2020
    Inventors: William J. SEHNERT, Yuan LIN
  • Patent number: 10552992
    Abstract: A method for reducing metal artifacts in a volume radiographic image acquires a first set of projection images of an object on a radiographic detector at different acquisition angles. An initial estimate of the volume that includes the object using the acquired projection images is generated. The estimated volume is updated by one or more iterations of generating a second set of scatter-corrected projection images using the acquired first set of projection images and the estimated volume; generating a third set of estimated projection images using forward ray-tracing through the estimated volume; and reconstructing the estimated volume according to a signal quality factor obtained from analysis of the detector signal and used in a comparison of the second set of scatter-corrected projection images with the third set of estimated projection images. One or more images rendered from the updated estimated volume are displayed.
    Type: Grant
    Filed: April 27, 2018
    Date of Patent: February 4, 2020
    Assignee: Carestream Health, Inc.
    Inventors: Yuan Lin, William J. Sehnert
  • Publication number: 20200005496
    Abstract: A method for scattered radiation correction acquires radiographic projection image data for a first portion of a subject that lies within a field of view of an imaging apparatus and characterizes the surface contour of the subject that includes at least a second portion of the subject that lies outside the field of view of the imaging apparatus. The surface contour of the subject is characterized according to the reflectance images. The surface contour characterization is registered to the field of view. Scattered radiation is estimated according to the projection image data and the surface contour characterization. The acquired radiographic projection image data is updated according to the estimated scattered radiation. An image of the field of view is displayed according to the conditioned acquired radiographic projection image data.
    Type: Application
    Filed: September 13, 2019
    Publication date: January 2, 2020
    Inventors: Yuan LIN, William J. SEHNERT
  • Patent number: 10517561
    Abstract: A mobile radiography apparatus has radio-opaque markers, each marker coupled to a portion of an x-ray head of the mobile radiography apparatus, wherein each of the markers is in a radiation path that extends from an x-ray source. A detector is mechanically uncoupled from the x-ray source for positioning behind a patient. Processing logic is configured to calculate detector position with relation to the x-ray source according to identified marker positions in acquired projection images, remove marker indications in the acquired projection images, reconstruct a volume image according to the acquired projection images, and display one or more portions of the reconstructed volume image.
    Type: Grant
    Filed: May 4, 2018
    Date of Patent: December 31, 2019
    Assignee: Carestream Health, Inc.
    Inventors: Yuan Lin, William J. Sehnert
  • Patent number: 10492755
    Abstract: A calibration phantom has a surface having a reflectance calibration target with a pattern that is indicative of one or more spatial reference positions. Radio-opaque markers are disposed in the calibration phantom and are positionally correlated to the one or more spatial reference positions of the reflectance calibration target.
    Type: Grant
    Filed: March 27, 2017
    Date of Patent: December 3, 2019
    Assignee: Carestream Health, Inc.
    Inventors: Yuan Lin, William J. Sehnert
  • Patent number: 10335101
    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: Grant
    Filed: May 27, 2016
    Date of Patent: July 2, 2019
    Assignee: Carestream Health, Inc.
    Inventors: David H. Foos, William J. Sehnert, Zhimin Huo, Hui Luo, Xiaohui Wang
  • Publication number: 20190175133
    Abstract: A method rotates a radiation source and a detector over a sequence of acquisition angles about a subject and acquires, at each acquisition angle, a 2D projection image. A simulation subset is formed that contains some, but not all, of the acquired 2D projection images, wherein subset membership is determined according to relative signal change between successive 2D projection images. Scatter is characterized for the acquired sequence of projection images according to the formed simulation subset. One or more of the acquired sequence of projection images is corrected using the scatter characterization. An image volume is reconstructed and stored according to the sequence of scatter corrected projection images. One or more images of the reconstructed image volume are rendered to a display or transmitting the stored image volume data.
    Type: Application
    Filed: August 21, 2018
    Publication date: June 13, 2019
    Inventors: Yuan LIN, William J. SEHNERT
  • Publication number: 20190175132
    Abstract: A method rotates a radiation source and a detector over a sequence of acquisition angles about a subject and acquires, at each acquisition angle, a 2D projection image. A simulation subset is formed that contains some, but not all, of the acquired 2D projection images, wherein subset membership is determined according to relative signal change between successive 2D projection images. Scatter is characterized for the acquired sequence of projection images according to the formed simulation subset. One or more of the acquired sequence of projection images is corrected using the scatter characterization. An image volume is reconstructed and stored according to the sequence of scatter corrected projection images. One or more images of the reconstructed image volume are rendered to a display or transmitting the stored image volume data.
    Type: Application
    Filed: August 21, 2018
    Publication date: June 13, 2019
    Inventors: Yuan LIN, William J. SEHNERT
  • Patent number: 10251612
    Abstract: A method for generating a modulation tube current waveform acquires reflectance images of a subject and generates a surface contour characterization of the subject according to the reflectance images. The surface contour is registered to the imaged field of view. A volume image is formed according to the generated surface contour. A modulation factor for the radiographic volume imaging apparatus is determined at a plurality of modulation points. A modulation tube current waveform is generated using the modulation factor.
    Type: Grant
    Filed: October 14, 2016
    Date of Patent: April 9, 2019
    Assignee: Carestream Health, Inc.
    Inventors: Yuan Lin, William J. Sehnert, Nathan J. Packard
  • Patent number: 10219774
    Abstract: A quality control phantom comprises a container and a frame to secure quality control accessories in position within the container during radiologic exposure testing.
    Type: Grant
    Filed: June 15, 2018
    Date of Patent: March 5, 2019
    Assignee: Carestream Health, Inc.
    Inventors: Yuan Lin, William J. Sehnert, Karin Toepfer