Patents by Inventor Jiahua Fan

Jiahua Fan 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: 10165996
    Abstract: An imaging system includes a computed tomography (CT) acquisition unit and a processing unit. The CT acquisition unit includes an X-ray source and a CT detector. The processing unit is configured to determine a voltage delivery configuration for the X-ray source based on at least one of a patient size, a clinical task, or scan parameters. The voltage delivery configuration includes at least one of a transition configuration or a voltage threshold. The transition configuration corresponds to a transition between a high voltage and a low voltage. Portions of acquired data acquired above the voltage threshold are grouped as high energy data and portions acquired below the voltage threshold are grouped as low energy data. The processing unit is also configured to implement the voltage delivery configuration on the CT acquisition unit, and to control the CT acquisition unit to perform an imaging scan using the determined voltage delivery configuration.
    Type: Grant
    Filed: September 30, 2015
    Date of Patent: January 1, 2019
    Assignee: General Electric Company
    Inventors: Priti Madhav, Uwe Wiedmann, Eric Biehr, Jiahua Fan, Jean-Francois Larroux, Vijay Subramanian
  • Patent number: 10085698
    Abstract: Methods and systems are provided for automated tube current modulation (ATCM). In one embodiment, a method for an imaging system comprises: calculating a desired dose level based on a clinical task, a size of a subject to be scanned, and an image quality level; generating a scan protocol based on a relation between the image quality level and at least one characteristic of the imaging system; and performing a scan of the subject at the desired dose level and according to the generated scan protocol. In this way, ATCM can be optimized based on elements that impact image quality such as the clinical task, the physical characteristics of the imaging system, the individual patient, and the reader's preference.
    Type: Grant
    Filed: January 26, 2016
    Date of Patent: October 2, 2018
    Assignee: Genereal Electric Company
    Inventors: Jiahua Fan, Xiaoyu Tian, Dominic Joseph Crotty
  • Publication number: 20180140261
    Abstract: A patient support system includes a support beam that may translocate along an axial axis of a medical imaging system. At least a portion of the support beam may be disposed within a central bore of the medical imaging system. The patient support system also includes a patient support removably coupled to the support beam and including a backing that may support a patient during an imaging procedure and a restraint extending a longitudinal length of the backing. The restraint includes a first end coupled to the backing and a second end that may be removably coupled to the support beam, and the restraint may secure the patient support to the support beam and to restrain the patient within the patient support.
    Type: Application
    Filed: November 22, 2016
    Publication date: May 24, 2018
    Inventors: Adam Israel Cohen, Douglas Grant, Joshua Lamb, Johanna Sumner, Jiahua Fan, Adam Pautsch, John Moore Boudry
  • Patent number: 9943279
    Abstract: Various methods and systems for weighting material density images based on the material imaged are disclosed. In one embodiment, a method for dual energy imaging of a material comprises generating an odd material density image, generating an even material density image, applying a first weight to the odd material density image and a second weight to the even material density image, and generating a material density image based on a combination of the weighted odd material density image and the weighted even material density image. In this way, the image quality may be improved without increasing a radiation dosage.
    Type: Grant
    Filed: October 21, 2014
    Date of Patent: April 17, 2018
    Assignee: General Electric Company
    Inventors: Jiahua Fan, Jie Tang, Hewei Gao
  • Publication number: 20180068823
    Abstract: An X-ray tube is provided. The X-ray tube includes an electron beam source including a cathode configured to emit an electron beam. The X-ray tube also includes an anode assembly including an anode configured to receive the electron beam and to emit X-rays when impacted by the electron beam. The X-ray tube further includes a gridding electrode disposed about a path of the electron beam between the electron beam source and the anode assembly. The gridding electrode, when powered at a specific level, is configured to grid the electron beam in synchronization with planned transitions during a dynamic focal spot mode.
    Type: Application
    Filed: September 7, 2016
    Publication date: March 8, 2018
    Inventors: Michael John Utschig, Uwe Wiedmann, Bruno Kristiaan Bernard De Man, Sergio Lemaitre, Mark Alan Frontera, Antonio Caiafa, Jiahua Fan, Adam Budde
  • Publication number: 20170209105
    Abstract: Methods and systems are provided for automated tube current modulation (ATCM). In one embodiment, a method for an imaging system comprises: calculating a desired dose level based on a clinical task, a size of a subject to be scanned, and an image quality level; generating a scan protocol based on a relation between the image quality level and at least one characteristic of the imaging system; and performing a scan of the subject at the desired dose level and according to the generated scan protocol. In this way, ATCM can be optimized based on elements that impact image quality such as the clinical task, the physical characteristics of the imaging system, the individual patient, and the reader's preference.
    Type: Application
    Filed: January 26, 2016
    Publication date: July 27, 2017
    Inventors: Jiahua Fan, Xiaoyu Tian, Dominic Joseph Crotty
  • Publication number: 20170202534
    Abstract: Methods and systems are provided for automatic exposure control in computed tomography imaging systems. In one embodiment, a method comprises in response to an object-specific dose metric input by a user via a user interface operably coupled to a scanner, predicting an image quality of a diagnostic scan, calculating an output level of a source of the scanner for the image quality, and performing the diagnostic scan at the output level when the image quality is higher than a threshold. In this way, patient-specific image quality settings may be determined.
    Type: Application
    Filed: January 20, 2016
    Publication date: July 20, 2017
    Inventors: Dominic Joseph Crotty, Roy A. Nilsen, Jiahua Fan, Mary Sue Kulpins, Franco Rupcich, Grant Morey Stevens
  • Publication number: 20170086775
    Abstract: An imaging system includes a computed tomography (CT) acquisition unit and a processing unit. The CT acquisition unit includes an X-ray source and a CT detector. The processing unit is configured to determine a voltage delivery configuration for the X-ray source based on at least one of a patient size, a clinical task, or scan parameters. The voltage delivery configuration includes at least one of a transition configuration or a voltage threshold. The transition configuration corresponds to a transition between a high and low voltage. Portions of acquired data acquired above the voltage threshold are grouped as high energy data and portions acquired below are grouped as low energy data. The processing unit is also configured to implement the voltage delivery configuration on the CT acquisition unit, and to control the CT acquisition unit to perform an imaging scan using the determined voltage delivery configuration.
    Type: Application
    Filed: September 30, 2015
    Publication date: March 30, 2017
    Inventors: Priti Madhav, Uwe Wiedmann, Eric Biehr, Jiahua Fan, Jean-Francois Larroux, Vijay Subramanian
  • Patent number: 9585626
    Abstract: Various methods and systems for dual energy spectral computed tomography imaging are provided. In one embodiment, a method for dual energy imaging comprises generating an image from a higher energy dataset and an updated lower energy dataset, wherein the updated lower energy dataset comprises a combination of a lower energy dataset and a pseudo projection dataset generated from the higher energy dataset. In this way, a weak low energy signal may be recovered, thereby enabling image reconstruction in spite of photon starvation and sparse views.
    Type: Grant
    Filed: December 11, 2014
    Date of Patent: March 7, 2017
    Assignee: General Electric Company
    Inventors: Hewei Gao, Tonghe Wang, Jiahua Fan, Guangzhi Cao
  • Patent number: 9538974
    Abstract: Various methods and systems are provided for estimating and compensating for table deflection in reconstructed images. In one embodiment, a method for computed tomography (CT) imaging comprises reconstructing images from data acquired during a helical CT scan where table deflection parameters are estimated and the reconstruction is adjusted based on the table deflection parameters. In this way, images may be reconstructed without artifacts caused by table deflection.
    Type: Grant
    Filed: November 20, 2014
    Date of Patent: January 10, 2017
    Assignees: General Electric Company, The University of Notre Dame du Lac
    Inventors: Guangzhi Cao, Jiang Hsieh, Jean-Baptiste Thibault, Jiahua Fan, Ken D. Sauer
  • Patent number: 9486173
    Abstract: An imaging system includes a computed tomography (CT) acquisition unit and a processing unit. The CT acquisition unit includes an X-ray source and a CT detector configured to collect CT imaging data of an object to be imaged. The X-ray source and CT detector are configured to be rotated about the object to be imaged and to collect a series of views of the object as the X-ray source and CT detector rotate about the object to be imaged. The processing unit is operably coupled to the CT acquisition unit and configured to control the CT acquisition unit to vary a view duration for the views of the series. The view duration for a particular view defines an imaging information acquisition period for the particular view, wherein the series of views includes a first group of views having a first view duration and a second group of views having a second view duration that is different than the first view duration.
    Type: Grant
    Filed: August 5, 2014
    Date of Patent: November 8, 2016
    Assignee: General Electric Company
    Inventors: Jiahua Fan, Jed Douglas Pack, Guangzhi Cao, David Joseph Pitterle, Grant Morey Stevens
  • Publication number: 20160302756
    Abstract: An imaging system includes a computer programmed to estimate noise in computed tomography (CT) imaging data, correlate the noise estimation with neighboring CT imaging data to generate a weighting estimation based on the correlation, de-noise the CT imaging data based on the noise estimation and on the weighting, and reconstruct an image using the de-noised CT imaging data.
    Type: Application
    Filed: June 29, 2016
    Publication date: October 20, 2016
    Inventors: Jiahua Fan, Meghan Lynn Yue, Jiang Hsieh, Roman Melnyk, Masatake Nukui, Yujiro Yazaki
  • Patent number: 9406107
    Abstract: An imaging system includes a computer programmed to estimate noise in computed tomography (CT) imaging data, correlate the noise estimation with neighboring CT imaging data to generate a weighting estimation based on the correlation, de-noise the CT imaging data based on the noise estimation and on the weighting, and reconstruct an image using the de-noised CT imaging data.
    Type: Grant
    Filed: December 18, 2013
    Date of Patent: August 2, 2016
    Assignee: GENERAL ELECTRIC COMPANY
    Inventors: Jiahua Fan, Meghan L. Yue, Jiang Hsieh, Roman Melnyk, Masatake Nukui, Yujiro Yazaki
  • Publication number: 20160166221
    Abstract: Various methods and systems for dual energy spectral computed tomography imaging are provided. In one embodiment, a method for dual energy imaging comprises generating an image from a higher energy dataset and an updated lower energy dataset, wherein the updated lower energy dataset comprises a combination of a lower energy dataset and a pseudo projection dataset generated from the higher energy dataset. In this way, a weak low energy signal may be recovered, thereby enabling image reconstruction in spite of photon starvation and sparse views.
    Type: Application
    Filed: December 11, 2014
    Publication date: June 16, 2016
    Inventors: Hewei Gao, Tonghe Wang, Jiahua Fan, Guangzhi Cao
  • Patent number: 9357976
    Abstract: An imaging system includes a computer programmed to reconstruct original CT projection data, estimate noise in image space, forward project the image noise estimate to generate an initial projection noise estimate, modify the initial projection noise estimate using a statistical property of noise in projection space, remove noise in the original CT projection data by subtracting the modified noise estimate therefrom to generate noise-removed projection data, and reconstruct a final image based on the noise-removed projection data.
    Type: Grant
    Filed: October 24, 2013
    Date of Patent: June 7, 2016
    Assignee: GENERAL ELECTRIC COMPANY
    Inventors: Guangzhi Cao, Jiahua Fan, Edgar Chino
  • Publication number: 20160143607
    Abstract: Various methods and systems are provided for estimating and compensating for table deflection in reconstructed images. In one embodiment, a method for computed tomography (CT) imaging comprises reconstructing images from data acquired during a helical CT scan where table deflection parameters are estimated and the reconstruction is adjusted based on the table deflection parameters. In this way, images may be reconstructed without artifacts caused by table deflection.
    Type: Application
    Filed: November 20, 2014
    Publication date: May 26, 2016
    Inventors: Guangzhi Cao, Jiang Hsieh, Jean-Baptiste Thibault, Jiahua Fan, Ken D. Sauer
  • Patent number: 9326738
    Abstract: Approaches for acquiring CT image data corresponding to a full scan, but at a reduced dose are disclosed. In one implementation, X-ray tube current modulation is employed to reduce the effective dose. In other implementations, acquisition of sparse views, z-collimation, and two-rotation acquisition protocols may be employed to achieve a reduced dose relative to a full-scan acquisition protocol.
    Type: Grant
    Filed: June 30, 2011
    Date of Patent: May 3, 2016
    Assignee: General Electric Company
    Inventors: Zhye Yin, Roy Arnulf Helge Nilsen, Jiahua Fan, Thomas Matthew Benson, Bruno Kristiaan Bernard De Man, Jed Douglas Pack, Kai Zeng
  • Publication number: 20160106386
    Abstract: Various methods and systems for weighting material density images based on the material imaged are disclosed. In one embodiment, a method for dual energy imaging of a material comprises generating an odd material density image, generating an even material density image, applying a first weight to the odd material density image and a second weight to the even material density image, and generating a material density image based on a combination of the weighted odd material density image and the weighted even material density image. In this way, the image quality may be improved without increasing a radiation dosage.
    Type: Application
    Filed: October 21, 2014
    Publication date: April 21, 2016
    Inventors: Jiahua Fan, Jie Tang, Hewei Gao
  • Publication number: 20160038113
    Abstract: An imaging system includes a computed tomography (CT) acquisition unit and a processing unit. The CT acquisition unit includes an X-ray source and a CT detector configured to collect CT imaging data of an object to be imaged. The X-ray source and CT detector are configured to be rotated about the object to be imaged and to collect a series of views of the object as the X-ray source and CT detector rotate about the object to be imaged. The processing unit is operably coupled to the CT acquisition unit and configured to control the CT acquisition unit to vary a view duration for the views of the series. The view duration for a particular view defines an imaging information acquisition period for the particular view, wherein the series of views includes a first group of views having a first view duration and a second group of views having a second view duration that is different than the first view duration.
    Type: Application
    Filed: August 5, 2014
    Publication date: February 11, 2016
    Inventors: Jiahua Fan, Jed Douglas Pack, Guangzhi Cao, David Joseph Pitterle, Grant Morey Stevens
  • Patent number: 9135728
    Abstract: A CT system includes a gantry, an x-ray source, a detector, and a grating collimator that includes alternating first and second materials. The system includes a controller configured to emit a first beam of x-rays from a first focal spot and to a first detector pixel, wherein the first beam of x-rays passes along a ray and through one of the first materials of the grating collimator, and subsequently emit a second beam of x-rays from a second focal spot and to the first detector pixel, wherein the second beam of x-rays passes substantially along the ray and through one of the second materials of the grating collimator. The system includes a computer programmed to generate first and second kVp image datasets using data acquired from the first beam and second beams of x-rays, and reconstruct a basis material image of the object.
    Type: Grant
    Filed: April 4, 2012
    Date of Patent: September 15, 2015
    Assignee: General Electric Company
    Inventors: Jiahua Fan, Jiang Hsieh, Naveen Chandra, Suresh Narayanan Narayanan, Dan Xu