Patents by Inventor Ajit Shankaranarayanan

Ajit Shankaranarayanan 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: 9778333
    Abstract: Systems and methods for reducing acoustic noise in a Magnetic Resonance Imaging (MRI) are provided. One method includes applying a labeling phase of an arterial spin labeling (ASL) pulse sequence to a region of interest, applying a three-dimensional (3D) radial pulse sequence to the region of interest to generate a tag image, applying a control phase of the ASL pulse sequence to the region of interest, and applying the 3D radial pulse sequence to the region of interest to generate a control image.
    Type: Grant
    Filed: May 23, 2013
    Date of Patent: October 3, 2017
    Assignee: General Electric Company
    Inventors: Wei Sun, Gaohong G. Wu, Jason Andrew Polzin, Ajit Shankaranarayanan
  • Publication number: 20140347048
    Abstract: Systems and methods for reducing acoustic noise in a Magnetic Resonance Imaging (MRI) are provided. One method includes applying a labeling phase of an arterial spin labeling (ASL) pulse sequence to a region of interest, applying a three-dimensional (3D) radial pulse sequence to the region of interest to generate a tag image, applying a control phase of the ASL pulse sequence to the region of interest, and applying the 3D radial pulse sequence to the region of interest to generate a control image.
    Type: Application
    Filed: May 23, 2013
    Publication date: November 27, 2014
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Wei SUN, Gaohong G. WU, Jason Andrew POLZIN, Ajit SHANKARANARAYANAN
  • Patent number: 8823375
    Abstract: A method for generating a magnetic resonance (MR) image includes acquiring MR data from each of a plurality of RF coils and applying a prospective motion correction method to the MR data for each RF coil including determining a set of motion measurements that include a scan plane orientation associated with each data point in the MR data. The MR data for each RF coil is divided into a plurality of scan plane orientation groups based on motion changes. A set of unaliasing coefficients is generated for each scan plan orientation group and applied to the MR data to synthesize data for each RF coil. The acquired MR data and synthesized data for each RF coil is combined to generate a scan plane orientation data set. Each scan plane orientation data set is combined to generate a complete k-space data set.
    Type: Grant
    Filed: January 3, 2012
    Date of Patent: September 2, 2014
    Assignee: General Electric Company
    Inventors: Suchandrima Banerjee, Ajit Shankaranarayanan, Philip Beatty, Eric Han
  • Patent number: 8355551
    Abstract: A method and apparatus are provided for reducing motion related imaging artifacts. The method includes determining an internal motion for of two regions of the object, each region having a different level of motion, scanning the first region using a first scan protocol based on the motion, scanning a second region using a second different scan protocol based on the motion, and generating an image of the object based on the first and second regions.
    Type: Grant
    Filed: February 27, 2009
    Date of Patent: January 15, 2013
    Assignees: General Electric Company, Hammersmith Imanet Ltd.
    Inventors: Kris Filip Johan Jules Thielemans, Scott David Wollenweber, Alexander Ganin, Anja Brau, Floribertus P. M. Heukensfeldt Jansen, Evren Asma, Rakesh Mullick, Ravindra Mohan Manjeshwar, Ajit Shankaranarayanan
  • Publication number: 20120206140
    Abstract: A method for generating a magnetic resonance (MR) image includes acquiring MR data from each of a plurality of RF coils and applying a prospective motion correction method to the MR data for each RF coil including determining a set of motion measurements that include a scan plane orientation associated with each data point in the MR data. The MR data for each RF coil is divided into a plurality of scan plane orientation groups based on motion changes. A set of unaliasing coefficients is generated for each scan plan orientation group and applied to the MR data to synthesize data for each RF coil. The acquired MR data and synthesized data for each RF coil is combined to generate a scan plane orientation data set. Each scan plane orientation data set is combined to generate a complete k-space data set.
    Type: Application
    Filed: January 3, 2012
    Publication date: August 16, 2012
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Suchandrima Banerjee, Ajit Shankaranarayanan, Philip Beatty, Eric Han
  • Patent number: 8111068
    Abstract: A method and system for improving image quality by correcting errors introduced by rotational motion of an object being imaged is provided. The object is associated with a fiducial mark. The method provides a computer executable methodology for detecting a rotation and selectively reordering, deleting and/or reacquiring projection data.
    Type: Grant
    Filed: September 27, 2010
    Date of Patent: February 7, 2012
    Inventors: Jeffrey L. Duerk, Ajit Shankaranarayanan, Michael Wendt, Jonathan S. Lewin
  • Publication number: 20110158477
    Abstract: A method and system for improving image quality by correcting errors introduced by rotational motion of an object being imaged is provided. The object is associated with a fiducial mark. The method provides a computer executable methodology for detecting a rotation and selectively reordering, deleting and/or reacquiring projection data.
    Type: Application
    Filed: September 27, 2010
    Publication date: June 30, 2011
    Inventors: Jeffrey L. DUERK, Ajit SHANKARANARAYANAN, Michael WENDT, Jonathan S. LEWIN
  • Patent number: 7953469
    Abstract: A system and method for MR imaging is disclosed that includes displaying a series of MR images of an ROI in real-time and localizing a slice within the ROI. The method also includes using a parallel imaging technique to acquire gated MR data from the localized slice and reconstructing a prescribed fixed number of gated MR images of the localized slice.
    Type: Grant
    Filed: February 1, 2008
    Date of Patent: May 31, 2011
    Assignee: General Electric Company
    Inventors: Ajit Shankaranarayanan, Andres Carrillo, Steven D. Wolff, Jean Helen Brittain
  • Patent number: 7830144
    Abstract: A method and system for improving image quality by correcting errors introduced by rotational motion of an object being imaged is provided. The object is associated with a fiducial mark. The method provides a computer executable methodology for detecting a rotation and selectively reordering, deleting and/or reacquiring projection data.
    Type: Grant
    Filed: September 13, 2005
    Date of Patent: November 9, 2010
    Inventors: Jeffrey L. Duerk, Ajit Shankaranarayanan, Michael Wendt, Jonathan S. Lewin
  • Publication number: 20100220909
    Abstract: A method and apparatus are provided for reducing motion related imaging artifacts. The method includes determining an internal motion for of two regions of the object, each region having a different level of motion, scanning the first region using a first scan protocol based on the motion, scanning a second region using a second different scan protocol based on the motion, and generating an image of the object based on the first and second regions.
    Type: Application
    Filed: February 27, 2009
    Publication date: September 2, 2010
    Applicants: GENERAL ELECTRIC COMPANY, HAMMERSMITH IMANET LTD.,
    Inventors: Kris Filip Johan Jules Thielemans, Scott David Wollenweber, Alexander Ganin, Anja Brau, Floribertus P. M. Heukensfeldt Jansen, Evren Asma, Rakesh Mullick, Ravindra Mohan Manjeshwar, Ajit Shankaranarayanan
  • Patent number: 7411397
    Abstract: The present invention is directed to slice selective magnetization preparation for moving table MRI. The present invention includes a method of magnetization preparation that takes into account patient movement or translation during the imaging process. The present invention adjusts or modifies the frequency at which magnetization preparation pulses are applied to offset the preparation pulse in space. This allows preparation pulses to be interleaved with imaging and enables magnetization preparation without sacrificing other imaging variables or parameters defined for the particular MR study. As such, contrast within a reconstructed image is improved.
    Type: Grant
    Filed: January 30, 2007
    Date of Patent: August 12, 2008
    Assignee: General Electric Company
    Inventors: Ajit Shankaranarayanan, Jean Helen Brittain
  • Publication number: 20080132778
    Abstract: A system and method for MR imaging is disclosed that includes displaying a series of MR images of an ROI in real-time and localizing a slice within the ROI. The method also includes using a parallel imaging technique to acquire gated MR data from the localized slice and reconstructing a prescribed fixed number of gated MR images of the localized slice.
    Type: Application
    Filed: February 1, 2008
    Publication date: June 5, 2008
    Inventors: Ajit Shankaranarayanan, Andres Carrillo, Steven D. Wolff, Jean Helen Brittain
  • Patent number: 7383074
    Abstract: A system and method for MR imaging is disclosed that includes displaying a series of MR images of an ROI in real-time and localizing a slice within the ROI. The method also includes using a parallel imaging technique to acquire gated MR data from the localized slice and reconstructing a prescribed fixed number of gated MR images of the localized slice.
    Type: Grant
    Filed: November 2, 2004
    Date of Patent: June 3, 2008
    Assignee: General Electric Company
    Inventors: Ajit Shankaranarayanan, Andres Carrillo, Steven D. Wolff, Jean H. Brittain
  • Publication number: 20070279056
    Abstract: The present invention is directed to slice selective magnetization preparation for moving table MRI. The present invention includes a method of magnetization preparation that takes into account patient movement or translation during the imaging process. The present invention adjusts or modifies the frequency at which magnetization preparation pulses are applied to offset the preparation pulse in space. This allows preparation pulses to be interleaved with imaging and enables magnetization preparation without sacrificing other imaging variables or parameters defined for the particular MR study. As such, contrast within a reconstructed image is improved.
    Type: Application
    Filed: January 30, 2007
    Publication date: December 6, 2007
    Inventors: Ajit Shankaranarayanan, Jean Brittain
  • Patent number: 7251520
    Abstract: The present invention is directed to slice selective magnetization preparation for moving table MRI. The present invention includes a method of magnetization preparation that takes into account patient movement or translation during the imaging process. The present invention adjusts or modifies the frequency at which magnetization preparation pulses are applied to offset the preparation pulse in space. This allows preparation pulses to be interleaved with imaging and enables magnetization preparation without sacrificing other imaging variables or parameters defined for the particular MR study. As such, contrast within a reconstructed image is improved.
    Type: Grant
    Filed: July 8, 2003
    Date of Patent: July 31, 2007
    Assignee: General Electric Company
    Inventors: Ajit Shankaranarayanan, Jean H. Brittain
  • Publication number: 20060116570
    Abstract: A method and system for improving image quality by correcting errors introduced by rotational motion of an object being imaged is provided. The object is associated with a fiducial mark. The method provides a computer executable methodology for detecting a rotation and selectively reordering, deleting and/or reacquiring projection data.
    Type: Application
    Filed: September 13, 2005
    Publication date: June 1, 2006
    Inventors: Jeffrey Duerk, Ajit Shankaranarayanan, Michael Wendt, Jonathan Lewin
  • Publication number: 20060100499
    Abstract: A system and method for MR imaging is disclosed that includes displaying a series of MR images of an ROI in real-time and localizing a slice within the ROI. The method also includes using a parallel imaging technique to acquire gated MR data from the localized slice and reconstructing a prescribed fixed number of gated MR images of the localized slice.
    Type: Application
    Filed: November 2, 2004
    Publication date: May 11, 2006
    Inventors: Ajit Shankaranarayanan, Andres Carrillo, Steven Wolff, Jean Brittain
  • Patent number: 7002342
    Abstract: A method and system for improving image quality by correcting errors introduced by rotational motion of an object being imaged is provided (1150). The method provides a computer executable methodology for detecting a rotation (1110) and selectively reordering (1160), deleting and/or reaquiring projection data (1260).
    Type: Grant
    Filed: April 19, 2002
    Date of Patent: February 21, 2006
    Assignee: Case Western Reserve University
    Inventors: Jeffrey L. Duerk, Ajit Shankaranarayanan, Michael Wendt, Jonathan S. Lewin
  • Publication number: 20050020907
    Abstract: The present invention is directed to slice selective magnetization preparation for moving table MRI. The present invention includes a method of magnetization preparation that takes into account patient movement or translation during the imaging process. The present invention adjusts or modifies the frequency at which magnetization preparation pulses are applied to offset the preparation pulse in space. This allows preparation pulses to be interleaved with imaging and enables magnetization preparation without sacrificing other imaging variables or parameters defined for the particular MR study. As such, contrast within a reconstructed image is improved.
    Type: Application
    Filed: July 8, 2003
    Publication date: January 27, 2005
    Inventors: Ajit Shankaranarayanan, Jean Brittain
  • Publication number: 20040145367
    Abstract: A method and system for improving image quality by correcting errors introduced by rotational motion of an object being imaged is provided (1150). The method provides a computer executable methodology for detecting a rotation (1110) and selectively reordering (1160), deleting and/or reaquiring projection data (1260).
    Type: Application
    Filed: October 23, 2003
    Publication date: July 29, 2004
    Inventors: Jeffrey L. Duerk, Ajit Shankaranarayanan, Michael Wendt, Jonathan S. Lewin