Patents by Inventor Roger M. Bowley

Roger M. Bowley 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: 7565189
    Abstract: A novel approach to the design of gradient coils for MRI is introduced which takes into account from the start the effects of induced E-fields and hence currents in a patient subjected to time dependent magnetic field gradients. The approach has led to conceptually novel designs of gradient coils which comprise distributions of electrodes or tessellae placed around the basic coil structure. When properly energised the electrode arrays are able, in the simplest case, to reduce the maximum E-field experienced by the patient by approximately a factor of three over that experienced with a standard fingerprint or distributed transverse gradient coil, the comparison being done for the same gradient strength, same coil diameter and same ROI.
    Type: Grant
    Filed: October 30, 2002
    Date of Patent: July 21, 2009
    Inventors: Peter Mansfield, Roger M. Bowley
  • Patent number: 4978920
    Abstract: The screen is provided by surrounding the coil producing the magnetic field with a set of electrical conductors the currents within the conductors being controlled in such a manner that the field is neutrailized in a specific region of space, the current distribution within the conductors being determined by calculating the current within a hypothetical superconductive shield which would have the effect of neutrailizing the field, the current through the conductors thereby being a substitute for the superconductive shield.
    Type: Grant
    Filed: April 14, 1989
    Date of Patent: December 18, 1990
    Assignee: National Research Development Corporation
    Inventors: Peter Mansfield, Barry L. W. Chapman, Robert Turner, Roger M. Bowley