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: 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: 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
  • 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
  • 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
  • Publication number: 20190053773
    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: October 22, 2018
    Publication date: February 21, 2019
    Inventors: William J. SEHNERT, Xiaohui WANG, Samuel RICHARD
  • Publication number: 20180333131
    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: Application
    Filed: May 4, 2018
    Publication date: November 22, 2018
    Inventors: Yuan LIN, William J. SEHNERT
  • Publication number: 20180336708
    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: Application
    Filed: April 27, 2018
    Publication date: November 22, 2018
    Inventors: Yuan LIN, William J. SEHNERT
  • Publication number: 20180325472
    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: Application
    Filed: May 4, 2018
    Publication date: November 15, 2018
    Inventors: Yuan LIN, William J. SEHNERT
  • Publication number: 20180296179
    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: Application
    Filed: June 15, 2018
    Publication date: October 18, 2018
    Inventors: Yuan LIN, William J. SEHNERT, Karin TOEPFER
  • Patent number: 10076293
    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: Grant
    Filed: October 1, 2013
    Date of Patent: September 18, 2018
    Assignee: Carestream Health, Inc.
    Inventors: William J. Sehnert, Samuel Richard, John Yorkston, Xiaohui Wang
  • Patent number: 10034648
    Abstract: A system for reconstructing a 3D volume has a surface acquisition system with a light source and an image sensor for characterizing the surface contour of a patient and an X-ray imaging system for acquiring X-ray projection data of the patient from a number of angular positions. A controller is programmed with instructions to synchronize the 3D surface contour characterization from the surface acquisition system with the acquired X-ray projection data. A processor executes a motion reduction method that uses the acquired X-ray projection data and the generated 3D surface contour characterization to reconstruct a 3D volume.
    Type: Grant
    Filed: May 26, 2016
    Date of Patent: July 31, 2018
    Assignee: Carestream Health, Inc.
    Inventors: Yuan Lin, William J. Sehnert
  • Patent number: 10028720
    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: October 6, 2015
    Date of Patent: July 24, 2018
    Assignee: Carestream Health, Inc.
    Inventors: Yuan Lin, William J. Sehnert, Karin Toepfer
  • Publication number: 20180113227
    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: Application
    Filed: May 18, 2017
    Publication date: April 26, 2018
    Inventors: Yuan Lin, William J. Sehnert
  • Publication number: 20180070912
    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: Application
    Filed: March 17, 2017
    Publication date: March 15, 2018
    Inventors: Yuan Lin, William J. Sehnert
  • Publication number: 20180070902
    Abstract: A system for reconstructing a 4D image has a surface acquisition system for generating a 3D surface model of an object and an X-ray imaging system for acquiring at least one 2D X-ray projection image of the object. A controller controls the surface acquisition system and the X-ray imaging system. A processor applies a 4D reconstruction algorithm/method to the 3D surface model and the at least one 2D X-ray projection to reconstruct a 4D X-ray volume of the imaged body part in motion.
    Type: Application
    Filed: June 2, 2017
    Publication date: March 15, 2018
    Inventors: Yuan Lin, William J. Sehnert
  • Publication number: 20180040121
    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: Application
    Filed: October 14, 2016
    Publication date: February 8, 2018
    Inventors: Yuan Lin, William J. Sehnert, Nathan J. Packard
  • Publication number: 20180014809
    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 phantom and are positionally correlated to the one or more spatial reference positions of the reflectance calibration target.
    Type: Application
    Filed: March 27, 2017
    Publication date: January 18, 2018
    Inventors: Yuan Lin, William J. Sehnert
  • Publication number: 20170196529
    Abstract: A system for reconstructing a 3D volume has a surface acquisition system with a light source and an image sensor for characterizing the surface contour of a patient and an X-ray imaging system for acquiring X-ray projection data of the patient from a number of angular positions. A controller is programmed with instructions to synchronize the 3D surface contour characterization from the surface acquisition system with the acquired X-ray projection data. A processor executes a motion reduction method that uses the acquired X-ray projection data and the generated 3D surface contour characterization to reconstruct a 3D volume.
    Type: Application
    Filed: May 26, 2016
    Publication date: July 13, 2017
    Inventors: Yuan Lin, William J. Sehnert
  • Publication number: 20170143284
    Abstract: An imaging method, executed at least in part by a computer, tracks the disposition of surgical supplies used in an operation and identifies a radiographic imaging technique for detecting a retained surgical foreign object according to the tracking. One or more radiographic images are acquired in the operating room. The acquired image content is analyzed to identify one or more candidate foreign objects. At least a portion of the acquired image content is displayed with the one or more candidate foreign objects in the acquired image content highlighted.
    Type: Application
    Filed: November 23, 2016
    Publication date: May 25, 2017
    Inventors: William J. Sehnert, Zhimin Huo