Patents by Inventor Yoshiaki Tsujii

Yoshiaki Tsujii 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).

  • Magnetic field stabilization method, magnetic field generating apparatus and magnetic resonance imaging apparatus
    Patent number: 6239680
    Abstract: In order to provide a magnetic field stabilization method, magnetic field generating apparatus and magnetic resonance imaging apparatus that is not affected by the temperature distribution in an installation space, in stabilizing a magnetic field of a magnetic field generating apparatus 2 having a pair of permanent magnets facing each other with a space interposed and yokes constituting a magnetic circuit for the permanent magnets, heat quantities to be applied to a plurality of positions are individually controlled (172, 174) based on the temperatures detected at a plurality of positions 154, 158 on the yoke to stabilize the respective temperatures at the plurality of positions.
    Type: Grant
    Filed: February 9, 2000
    Date of Patent: May 29, 2001
    Assignee: GE Yokogawa Medical Systems, Limited
    Inventors: Shigeo Nagano, Tsunemoto Suzuki, Hideaki Uno, Yuji Inoue, Yoshifumi Higa, Yoshiaki Tsujii