Patents by Inventor Keita Yamazaki

Keita Yamazaki 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: 6941165
    Abstract: A magnetic field distribution measurement device (1) provides a non-contact magnetic measurement on a subject's chest at a plurality of coordinates and forms therefrom time-series magnetic field distribution data. A first arithmetic device (2) in response generates image data representing an intramyocardial excitation conduction rate. A second arithmetic device (3) receives a plurality of tomographic image data separately obtained by a tomographic diagnosis apparatus and processes the data to generate three-dimensional, anatomical image data. A display device (4) receives these data and displays on an anatomical image an image representing an intramyocardial excitation current. This can facilitate identifying an anatomical, positional relationship of a ventricular late potential caused in heart muscle. Furthermore, the anatomical image may be replaced with an image representing a normal stimulation conduction path and serving as a template.
    Type: Grant
    Filed: July 17, 2001
    Date of Patent: September 6, 2005
    Assignees: Japan Science and Technology Corporation, Takenaka Corporation
    Inventors: Kenji Nakai, Masahito Yoshizawa, Kohei Kawazoe, Keita Yamazaki, Satoshi Fujita, Itsuro Tamura
  • Publication number: 20040077964
    Abstract: A magnetic field distribution measurement device (1) provides a non-contact magnetic field measurement on a subject's chest at a plurality of coordinates and forms therefrom time-series magnetic field distribution data. A first arithmetic device (2) in response generates image data representing a three-dimensional, intramyocardial current density distribution. A second arithmetic device (3) receives a plurality of tomographic image data separately obtained by a tomographic diagnosis apparatus and processes the data to generate three-dimensional, anatomical image data. A display device (4) receives these data and displays on an anatomical image an image representing an intramyocardial current density. This can facilitate identifying an anatomical, positional relationship of an abnormal, electrical reentry circuit caused in heart muscle. Furthermore, the anatomical image may be replaced with an image representing a normal stimulation propagation circuit and serving as a template.
    Type: Application
    Filed: October 14, 2003
    Publication date: April 22, 2004
    Inventors: Kenji Nakai, Masahito Yoshizawa, Kohei Kawazoe, Keita Yamazaki, Satoshi Fujita, Itsuro Tamura
  • Publication number: 20040049119
    Abstract: A magnetic field distribution measurement device (1) provides a non-contact magnetic measurement on a subject's chest at a plurality of coordinates and forms therefrom time-series magnetic field distribution data. A first arithmetic device (2) in response generates image data representing an intramyocardial excitation conduction rate. A second arithmetic device (3) receives a plurality of tomographic image data separately obtained by a tomographic diagnosis apparatus and processes the data to generate three-dimensional, anatomical image data. A display device (4) receives these data and displays on an anatomical image an image representing an intramyocardial excitation current. This can facilitate identifying an anatomical, positional relationship of a ventricular late potential caused in heart muscle. Furthermore, the anatomical image may be replaced with an image representing a normal stimulation conduction path and serving as a template.
    Type: Application
    Filed: October 14, 2003
    Publication date: March 11, 2004
    Inventors: Kenji Nakai, Masahito Yoshizawa, Kohei Kawazoe, Keita Yamazaki, Satoshi Fujita, Itsuro Tamura