Patents by Inventor Jiang Hsieh

Jiang Hsieh 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: 8971605
    Abstract: A method is provided. The method includes acquiring a first dataset at a first energy spectrum and a second dataset at a second energy spectrum. The method also includes extracting a metal artifact correction signal using the first dataset and the second dataset or using a first reconstructed image and a second reconstructed image generated respectively from the first and the second datasets. The method further includes performing metal artifact correction on the first reconstructed image using the metal artifact correction signal to generate a first corrected image.
    Type: Grant
    Filed: August 23, 2012
    Date of Patent: March 3, 2015
    Assignee: General Electric Company
    Inventors: Jiang Hsieh, Brian Edward Nett, Paavana Sainath, Debashish Pal
  • Publication number: 20150036794
    Abstract: A system and method include acquisition of a set of projections from an object using a CT imaging system and reconstruct an initial image of the scanned object from the set of projections, the reconstructed initial image comprising a plurality of pixels. The system and method also include identification of a candidate pixel within the plurality of pixels, application of a nonlinear enhancement to the candidate pixel to iteratively adjust an intensity value of the candidate pixel, and generation of a final image using the adjusted intensity value of the candidate pixel.
    Type: Application
    Filed: July 31, 2013
    Publication date: February 5, 2015
    Applicant: General Electric Company
    Inventor: Jiang Hsieh
  • Patent number: 8942341
    Abstract: A CT system includes an x-ray source configured to project an x-ray beam toward an object, a detector array, and a bowtie filter. The bowtie filter includes a first x-ray filtration region positioned to attenuate x-rays that pass through an isochannel of the detector array, a second x-ray filtration region positioned to attenuate x-rays that pass through channels of the detector array that are offcenter in a channel direction from the isochannel, and an x-ray attenuation material positionable to attenuate the x-rays that pass through the channels of the detector array that are offcenter in the channel direction from the isochannel. The CT system also includes a data acquisition system (DAS) connected to the detector array and configured to receive outputs from the detector array, and a computer programmed to acquire projections of imaging data of the object, and generate an image of the object using the imaging data.
    Type: Grant
    Filed: September 1, 2011
    Date of Patent: January 27, 2015
    Assignee: General Electric Company
    Inventors: Jiang Hsieh, Abdelaziz Ikhlef, Paavana Sainath, Xiaoye Wu, Roman Melnyk
  • Patent number: 8923583
    Abstract: A method for reconstructing image component densities of an object includes acquiring multi-spectral x-ray tomographic data, performing a material decomposition of the multi-spectral x-ray tomographic data to generate a plurality of material sinograms, and reconstructing a plurality of material component density images by iteratively optimizing a functional that includes a joint likelihood term of at least two of the material decomposed sinograms. An x-ray tomography imaging system and a non-transitory computer readable medium are also described herein.
    Type: Grant
    Filed: June 22, 2012
    Date of Patent: December 30, 2014
    Assignee: General Electric Company
    Inventors: Jean-Baptiste Thibault, Charles A. Bouman, Jr., Ruoqiao Zhang, Jiang Hsieh, Ken David Sauer
  • Publication number: 20140363069
    Abstract: A method is provided. The method includes acquiring a first dataset at a first energy spectrum and a second dataset at a second energy spectrum. The method also includes extracting a metal artifact correction signal using the first dataset and the second dataset or using a first reconstructed image and a second reconstructed image generated respectively from the first and the second datasets. The method further includes performing metal artifact correction on the first reconstructed image using the metal artifact correction signal to generate a first corrected image.
    Type: Application
    Filed: August 27, 2014
    Publication date: December 11, 2014
    Inventors: Jiang Hsieh, Brian Edward Nett, Pavaana Sainath, Debashish Pal
  • Publication number: 20140341355
    Abstract: A collimator for an imaging system includes a first region comprising a first one-dimensional array of apertures along a channel direction, and a second region comprising a second one-dimensional array of apertures along the channel direction, wherein an aspect ratio of the apertures of the first region is greater than an aspect ratio of the second region.
    Type: Application
    Filed: August 5, 2014
    Publication date: November 20, 2014
    Inventors: Jiang Hsieh, Thomas Murray Leeds, Abdelaziz Ikhlef
  • Patent number: 8885903
    Abstract: Methods and apparatus for statistical iterative reconstruction are provided. One method includes pre-processing acquired raw measurement data to modify the raw data measurement data and determining a change in a variance of the raw measurement data resulting from the modification to the raw measurement data during pre-processing. The method also includes reconstructing an image using the modified raw measurement data resulting from the pre-processing and the determined change in variance.
    Type: Grant
    Filed: November 16, 2011
    Date of Patent: November 11, 2014
    Assignee: General Electric Company
    Inventors: Jean-Baptiste Thibault, Jiang Hsieh, Thomas Matthew Benson
  • Publication number: 20140328450
    Abstract: An imaging system includes a rotatable gantry for receiving an object to be scanned, a generator configured to energize an x-ray source to generate x-rays, a detector positioned to receive the x-rays that pass through the object, and a computer. The computer is programmed to obtain knowledge of a metal within the object, scan the object using system scanning parameters, reconstruct an image of the object using a reconstruction algorithm, and automatically select at least one of the system scanning parameters and the reconstruction algorithm based on the obtained knowledge.
    Type: Application
    Filed: May 2, 2013
    Publication date: November 6, 2014
    Applicant: General Electric Company
    Inventors: Debashish Pal, Jiang Hsieh, Paavana Sainath, Girijesh Yadava, Brian Edward Nett
  • Publication number: 20140328448
    Abstract: A method is provided. The method includes acquiring projection data of an object from a plurality of pixels, reconstructing the acquired projection data from the plurality of pixels into a reconstructed image, performing material characterization and decomposition of an image volume of the reconstructed image to reduce a number of materials analyzed in the image volume to two basis materials. The method also includes generating a re-mapped image volume for at least one basis material of the two basis materials, and performing forward projection on at least the re-mapped image volume for the at least one basis material to produce a material-based projection. The method further includes generating multi-material corrected projections based on the material-based projection and a total projection attenuated by the object, which represents both of the two basis materials, wherein the multi-material corrected projections include linearized projections.
    Type: Application
    Filed: July 15, 2014
    Publication date: November 6, 2014
    Inventors: Xiaoye Wu, Jiang Hsieh, Paavana Sainath, Dan Xu, Yannan Jin, Girijesh Kumar Yadava, Adam Israel Cohen, Hewei Gao
  • Patent number: 8831180
    Abstract: A collimator for an imaging system includes a first region comprising a first one-dimensional array of apertures along a channel direction, and a second region comprising a second one-dimensional array of apertures along the channel direction, wherein an aspect ratio of the apertures of the first region is greater than an aspect ratio of the second region.
    Type: Grant
    Filed: August 4, 2011
    Date of Patent: September 9, 2014
    Assignee: General Electric Company
    Inventors: Jiang Hsieh, Thomas Murray Leeds, Abdelaziz Ikhlef
  • Patent number: 8811709
    Abstract: A method is provided. The method includes acquiring projection data of an object from a plurality of pixels, reconstructing the acquired projection data from the plurality of pixels into a reconstructed image, performing material characterization and decomposition of an image volume of the reconstructed image to reduce a number of materials analyzed in the image volume to two basis materials. The method also includes generating a re-mapped image volume for at least one basis material of the two basis materials, and performing forward projection on at least the re-mapped image volume for the at least one basis material to produce a material-based projection. The method further includes generating multi-material corrected projections based on the material-based projection and a total projection attenuated by the object, which represents both of the two basis materials, wherein the multi-material corrected projections include linearized projections.
    Type: Grant
    Filed: November 14, 2012
    Date of Patent: August 19, 2014
    Assignee: General Electric Company
    Inventors: Xiaoye Wu, Jiang Hsieh, Paavana Sainath, Dan Xu, Yannan Jim, Girijesh Kumar Yadava, Adam Israel Cohen, Hewei Gao
  • Publication number: 20140185745
    Abstract: A collimator for use in a CT system made of an X-ray absorbing material, the collimator comprises an imaging aperture having a first width for passage of a first X-ray beam, the first X-ray beam being used for X-ray imaging, and a tracking aperture having a second width for passage of a second X-ray beam, the second X-ray beam being used for X-ray beam tracking.
    Type: Application
    Filed: December 20, 2013
    Publication date: July 3, 2014
    Applicant: General Electric Company
    Inventors: Bin WANG, Jiang HSIEH, Xianjun PAN, Jiaqin DONG
  • Patent number: 8768033
    Abstract: A system, method, and apparatus includes a computed tomography (CT) system having a rotatable gantry, an x-ray source, a generator, a detector having pixels and positioned to receive x-rays, and a computer. The computer is programmed to acquire CT data representative of an object, determine a first subset of the CT data, determine a second subset of the CT data, and determine a difference between the first and second subsets of the CT data to identify a motion region in the object. The computer is also programmed to update image data reconstructed from a first portion of the first subset of the CT data and corresponding to the region and reconstruct an image based on the updated image data and non-updated image data. The non-updated image data is reconstructed from a second portion the first subset of the CT data.
    Type: Grant
    Filed: August 23, 2012
    Date of Patent: July 1, 2014
    Assignee: General Electric Company
    Inventors: Jiang Hsieh, Roy-Arnulf Helge Nilsen, Peter Michael Edic, Bruno Kristiaan Bernard De Man, Jean-Baptiste Thibault, Baojun Li, John Lawrence Seamans
  • Patent number: 8761478
    Abstract: A tomographic system includes a gantry having an opening for receiving an object to be scanned, a radiation source, a detector positioned to receive radiation from the source that passes through the object, and a computer. The computer is programmed to acquire a plurality of projection datasets of the object, define a temporal subset of projection datasets from the plurality of projection datasets, reconstruct a working image of the object using the plurality of projection datasets, identify a region of motion in the working image, and minimize motion artifacts in the region of motion in the working image using the temporal subset of projection datasets.
    Type: Grant
    Filed: May 6, 2010
    Date of Patent: June 24, 2014
    Assignee: General Electric Company
    Inventors: Jiang Hsieh, Brian Edward Nett, Debashish Pal, Basel Hasan Taha, Jean-Baptiste Thibault, Zhou Yu
  • Publication number: 20140161340
    Abstract: An improved iterative reconstruction method to reconstruct a first image includes generating an imaging beam, receiving said imaging beam on a detector array, generating projection data based on said imaging beams received by said detector array, providing said projection data to an image reconstructor, enlarging one of a plurality of voxels and a plurality of detectors of the provided projection data, reconstructing portions of the first image with the plurality of enlarged voxels or detectors, and iteratively reconstructing the portions of the first image to create a reconstructed image.
    Type: Application
    Filed: February 14, 2014
    Publication date: June 12, 2014
    Applicants: General Electric Company, Purdue Research Foundation, University of Notre Dame du Lac
    Inventors: Kai Zeng, Charles Addison Bouman, JR., Bruno Kristiaan Bernard De Man, Jiang Hsieh, Ken David Sauer, Jean-Baptiste Thibault, Zhou Yu
  • Publication number: 20140133719
    Abstract: A method is provided. The method includes acquiring projection data of an object from a plurality of pixels, reconstructing the acquired projection data from the plurality of pixels into a reconstructed image, performing material characterization and decomposition of an image volume of the reconstructed image to reduce a number of materials analyzed in the image volume to two basis materials. The method also includes generating a re-mapped image volume for at least one basis material of the two basis materials, and performing forward projection on at least the re-mapped image volume for the at least one basis material to produce a material-based projection. The method further includes generating multi-material corrected projections based on the material-based projection and a total projection attenuated by the object, which represents both of the two basis materials, wherein the multi-material corrected projections include linearized projections.
    Type: Application
    Filed: November 14, 2012
    Publication date: May 15, 2014
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Xiaoye Wu, Jiang Hsieh, Paavana Sainath, Dan Xu, Yannan Jin, Girijesh Kumar Yadava, Adam Israel Cohen, Hewei Gao
  • Patent number: 8699811
    Abstract: An imaging system includes a two-dimensional detector having a plurality of cells wherein each cell is configured to detect energy or signal passing through an object. The imaging system includes a computer programmed to acquire imaging data for the plurality of cells, identify a cell to be corrected, based on the imaging data, interpolate Ix and Iy for the identified cell based on neighbor cells, and calculate local gradients gx and gy between the identified cell and its neighbor cells based on the interpolation. The computer is further programmed to calculate weighting factors wx and wy based on the local gradients, calculate a corrected final value I(0,0) for the identified cell, and correct the identified cell with the corrected final value.
    Type: Grant
    Filed: January 19, 2011
    Date of Patent: April 15, 2014
    Assignee: General Electric Company
    Inventors: Baojun Li, Jiang Hsieh
  • Patent number: 8699812
    Abstract: A non-transitory computer readable storage medium having stored thereon a computer program comprising instructions, which when executed by a computer, cause the computer to acquire an image comprising image data reconstructed from an imaging device. The instructions further cause the computer to apply a bloom reduction algorithm to the image configured to iteratively reduce a blooming of high-density objects in the image.
    Type: Grant
    Filed: June 9, 2011
    Date of Patent: April 15, 2014
    Assignee: General Electric Company
    Inventors: Jiang Hsieh, Sandeep Dutta
  • Publication number: 20140056497
    Abstract: A method is provided. The method includes acquiring a first dataset at a first energy spectrum and a second dataset at a second energy spectrum. The method also includes extracting a metal artifact correction signal using the first dataset and the second dataset or using a first reconstructed image and a second reconstructed image generated respectively from the first and the second datasets. The method further includes performing metal artifact correction on the first reconstructed image using the metal artifact correction signal to generate a first corrected image.
    Type: Application
    Filed: August 23, 2012
    Publication date: February 27, 2014
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Jiang Hsieh, Brian Edward Nett, Paavana Sainath, Debashish Pal
  • Patent number: 8655033
    Abstract: An improved iterative reconstruction method to reconstruct a first image includes generating an imaging beam, receiving said imaging beam on a detector array, generating projection data based on said imaging beams received by said detector array, providing said projection data to an image reconstructor, enlarging one of a plurality of voxels and a plurality of detectors of the provided projection data, reconstructing portions of the first image with the plurality of enlarged voxels or detectors, and iteratively reconstructing the portions of the first image to create a reconstructed image.
    Type: Grant
    Filed: October 28, 2009
    Date of Patent: February 18, 2014
    Assignees: General Electric Company, University of Notre Dame Du Lac, Purdue Research Foundation
    Inventors: Kai Zeng, Charles Addison Bouman, Jr., Bruno Kristiaan Bernard De Man, Jiang Hsieh, Ken David Sauer, Jean-Baptiste Daniel Marie Thibault, Zhou Yu