Patents by Inventor Keigo KAWAJI

Keigo KAWAJI 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: 20200305757
    Abstract: An apparatus to jointly measure oxygen utilization and tissue strain includes an imaging system and a computer processor operatively coupled to the imaging system. The computer processor is configured to control the imaging system to perform a pulse sequence on tissue of a subject. The computer processor also acquires oxygen utilization data and strain data responsive to the pulse sequence. The computer processor further determines an amount of strain on the tissue of the subject based at least in part on the strain data and an amount of oxygen utilization of the tissue of the subject based at least in part on the oxygen utilization data.
    Type: Application
    Filed: October 23, 2018
    Publication date: October 1, 2020
    Inventors: Charles G. Cantrell, Keigo Kawaji, Amit R. Patel, Timothy J. Carroll
  • Patent number: 9702956
    Abstract: A method and apparatus for MRI retrospective reconstruction determines a period of minimal coronary artery motion within the acquired temporal window with a rotation angle optimized for a K-space four-dimensional (4D) volume by a segmented 4D radial stack-of-stars (SOS) acquisition during a temporal acquisition window (taw). Radial stacks of the image of an object are acquired by performing the radial (SOS) acquisition to determine a plurality of kz plane samples of the object, in which each kz plane is repeatedly determined during a sub-window of the temporal acquisition window. Consecutive volumes of kz centric slices of the image at each temporal sub-window of the temporal acquisition window are generated and summed to fill a 3D k-space volume. The radial (SOS) acquisition of the image is determined utilizing a customized rotation angle ? providing a uniform distribution of k-space spokes of the kz centric slices for each sub-window of the (taw).
    Type: Grant
    Filed: May 9, 2014
    Date of Patent: July 11, 2017
    Assignee: Beth Israel Deaconess Medical Center, Inc. (BIDMC, INC.)
    Inventors: Keigo Kawaji, Reza Nezafat, Warren J Manning
  • Publication number: 20150276909
    Abstract: A method and apparatus for MRI retrospective reconstruction determines a period of minimal coronary artery motion within the acquired temporal window with a rotation angle optimized for a K-space four-dimensional (4D) volume by a segmented 4D radial stack-of-stars (SOS) acquisition during a temporal acquisition window (taw). Radial stacks of the image of an object are acquired by performing the radial (SOS) acquisition to determine a plurality of kz plane samples of the object, in which each kz plane is repeatedly determined during a sub-window of the temporal acquisition window. Consecutive volumes of kz centric slices of the image at each temporal sub-window of the temporal acquisition window are generated and summed to fill a 3D k-space volume. The radial (SOS) acquisition of the image is determined utilizing a customized rotation angle ? providing a uniform distribution of k-space spokes of the kz centric slices for each sub-window of the (taw).
    Type: Application
    Filed: May 9, 2014
    Publication date: October 1, 2015
    Applicant: Beth Israel Deaconess Medical Center, Inc. (BIDMC, INC.)
    Inventors: Keigo KAWAJI, Reza NEZAFAT, Warren J. MANNING