Patents Assigned to Quality Electrodynamics
  • FAILSAFE PROTECTION FROM INDUCED RF CURRENT FOR MRI RF COIL ASSEMBLY HAVING TRANSMIT FUNCTIONALITY
    Publication number: 20110291655
    Abstract: An electrically-controlled failsafe switch is included in an MRI transmit-and-receive RF coil assembly so as to protect it from induced RF currents in the event it is disconnected from an MRI system, but inadvertently left linked to strong MRI RF fields during imaging procedures using other RF coils.
    Type: Application
    Filed: June 1, 2010
    Publication date: December 1, 2011
    Applicants: TOSHIBA MEDICAL SYSTEMS CORPORATION, QUALITY ELECTRODYNAMICS, LLC
    Inventors: Yoshinori Hamamura, Xiaoyu Yang, Nicholas Castrilla, Christopher J. Allen, Shinji Mitsui
  • IC tags/RFID tags for magnetic resonance imaging applications
    Patent number: 7821402
    Abstract: An RFID tag for use with an MRI machine has an integrated circuit and structure for protecting it from damage when exposed to an intense MRI RF transmitter field. The structure for protecting the integrated circuit may include a controllable low impedance device coupled across the integrated circuit, a controllable high impedance device coupled in series with the integrated circuit, and/or frequency selective RF filter.
    Type: Grant
    Filed: May 5, 2006
    Date of Patent: October 26, 2010
    Assignee: Quality ElectroDynamics
    Inventors: Xiaoyu Yang, Hiroyuki Fujita, Tsinghua Zheng
  • Active decoupling of MRI RF transmit coils
    Patent number: 7336074
    Abstract: An MRI RF transmit system uses a plurality of RF transmit coils, each being driven with separately controllable RF magnitude and phase. The magnitude and phase of each coil drive are separately and independently controlled so that the RF transmit coils act as if they are decoupled from each other. The controlled magnitude and phase values may be based on empirically derived information relating to self and mutual coupling of RF transmit coils.
    Type: Grant
    Filed: May 5, 2006
    Date of Patent: February 26, 2008
    Assignee: Quality Electrodynamics
    Inventors: Xiaoyu Yang, Hiroyuki Fujita, Tsinghua Zheng
  • Active decoupling of MRI RF transmit coils
    Publication number: 20070273377
    Abstract: An MRI RF transmit system uses a plurality of RF transmit coils, each being driven with separately controllable RF magnitude and phase. The magnitude and phase of each coil drive are separately and independently controlled so that the RF transmit coils act as if they are decoupled from each other. The controlled magnitude and phase values may be based on empirically derived information relating to self and mutual coupling of RF transmit coils.
    Type: Application
    Filed: May 5, 2006
    Publication date: November 29, 2007
    Applicant: Quality ElectroDynamics
    Inventors: Xiaoyu Yang, Hiroyuki Fujita, Tsinghua Zheng
  • IC tags/RFID tags for magnetic resonance imaging applications
    Publication number: 20070257800
    Abstract: An RFID tag for use with an MRI machine has an integrated circuit and structure for protecting it from damage when exposed to an intense MRI RF transmitter field. The structure for protecting the integrated circuit may include a controllable low impedance device coupled across the integrated circuit, a controllable high impedance device coupled in series with the integrated circuit, and/or frequency selective RF filter.
    Type: Application
    Filed: May 5, 2006
    Publication date: November 8, 2007
    Applicant: Quality ElectroDynamics
    Inventors: Xiaoyu Yang, Hiroyuki Fujita, Tsinghua Zheng