Patents by Inventor Andrew E. Arai

Andrew E. Arai 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).

  • Method for extracting deformations from velocity-encoded magnetic resonance images of the heart
    Patent number: 6031374
    Abstract: An MRI scan is conducted in which velocity encoded NMR data is acquired for a slice through the heart. Velocity images and magnitude images are reconstructed at multiple cardiac phases and masks are formed using the magnitude images. The masks are applied to the velocity images to isolate the left ventricle, and rigid body motion is calculated and subtracted from the masked velocity images to indicate deformation of the left ventricle.
    Type: Grant
    Filed: September 25, 1997
    Date of Patent: February 29, 2000
    Inventors: Frederick H. Epstein, Andrew E. Arai, Carl C. Gaither, Steven D. Wolff
  • Retrospective ordering of segmented MRI cardiac data using cardiac phase
    Patent number: 5997883
    Abstract: A method is disclosed to reconstruct multiphase MR images that accurately depict the entire cardiac cycle. A segmented, gradient-recalled-echo sequence is modified to acquire data continuously. Images are retrospectively reconstructed by selecting views from each heartbeat based on cardiac phase rather than the time elapsed from the QRS complex. Cardiac phase is calculated using a model that compensates for beat-to-beat heart rate changes.
    Type: Grant
    Filed: July 1, 1997
    Date of Patent: December 7, 1999
    Assignee: General Electric Company
    Inventors: Frederick H. Epstein, Andrew E. Arai, Jeffrey A. Feinstein, Thomas K. Foo, Steven D. Wolff