Patents by Inventor Navid P. Gandji

Navid P. Gandji 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).

  • Apparatus and method for tuning the permittivity of ultrahigh dielectric constant materials in an RF coil for MR imaging
    Patent number: 11275132
    Abstract: An apparatus for transmitting and receiving radiofrequency (RF) signals in a magnetic resonance imaging system for proton and X-nuclear imaging includes at least one radiofrequency (RF) coil and an ultrahigh dielectric constant material incorporated within the at least one RF coil. The permittivity of the ultrahigh dielectric constant material depends on a temperature of the material and is tunable. The apparatus also includes a temperature controller that is thermally coupled to the ultrahigh dielectric constant material. The temperature controller is configured to control a temperature of the ultrahigh dielectric constant material to tune and optimize the permittivity of the ultrahigh dielectric constant material. A chemical structure and composition of the ultrahigh dielectric constant material is selected to control and optimize the permittivity and a dielectric loss of the ultrahigh dielectric constant material and a temperature dependence of the ultrahigh dielectric constant material.
    Type: Grant
    Filed: April 8, 2020
    Date of Patent: March 15, 2022
    Assignees: REGENTS OF THE UNIVERSITY OF MINNESOTA, The Penn State Research Foundation
    Inventors: Wei Chen, Byeong-Yeul Lee, Xiao-Hong Zhu, Hannes M. Wiesner, Michael T. Lanagan, Qing X. Yang, Sebastian Rupprecht, Navid P. Gandji, Maryam Sarkarat
  • APPARATUS AND METHOD FOR TUNING THE PERMITTIVITY OF ULTRAHIGH DIELECTRIC CONSTANT MATERIALS IN AN RF COIL FOR MR IMAGING
    Publication number: 20200319275
    Abstract: An apparatus for transmitting and receiving radiofrequency (RF) signals in a magnetic resonance imaging system for proton and X-nuclear imaging includes at least one radiofrequency (RF) coil and an ultrahigh dielectric constant material incorporated within the at least one RF coil. The permittivity of the ultrahigh dielectric constant material depends on a temperature of the material and is tunable. The apparatus also includes a temperature controller that is thermally coupled to the ultrahigh dielectric constant material. The temperature controller is configured to control a temperature of the ultrahigh dielectric constant material to tune and optimize the permittivity of the ultrahigh dielectric constant material. A chemical structure and composition of the ultrahigh dielectric constant material is selected to control and optimize the permittivity and a dielectric loss of the ultrahigh dielectric constant material and a temperature dependence of the ultrahigh dielectric constant material.
    Type: Application
    Filed: April 8, 2020
    Publication date: October 8, 2020
    Inventors: Wei Chen, Byeong-Yeul Lee, Xiao-Hong Zhu, Hannes M. Wiesner, Michael T. Lanagan, Qing X. Yang, Sebastian Rupprecht, Navid P. Gandji, Maryam Sarkarat