Patents by Inventor William H. Perman

William H. Perman 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).

  • Short echo NMR imaging of sodium
    Patent number: 4803432
    Abstract: An NMR pulse sequence includes a nonselective RF excitation pulse followed by one or more nonselective echo RF pulses which produce NMR echo signals at echo times starting at TE=2.5 milliseconds. This short echo time enables paramagnetic nuclei having short T.sub.2 relaxation components, such as sodium.sup.23, to be measured and imaged. Presaturation pulses at the beginning of the NMR pulse sequence serve as an alternative to slice selection.
    Type: Grant
    Filed: August 13, 1987
    Date of Patent: February 7, 1989
    Assignee: Wisconsin Alumni Research Foundation
    Inventor: William H. Perman
  • NMR radio frequecny field coil with distributed current
    Patent number: 4783641
    Abstract: A uniform surface current density is approximated in an RF transmitting/receiving NMR coil by employing a plurality of discrete conductors having a resonantly distributed current. Inductive and capacitive lines provide a sinusoidal current distribution with various resonant modes providing different magnetic field orientations. The distributed current reduces losses. In a second order resonant mode, decoupling of the surface coil from a transmit coil is achieved without a blocking network.
    Type: Grant
    Filed: August 13, 1987
    Date of Patent: November 8, 1988
    Assignee: General Electric Company
    Inventors: Cecil E. Hayes, Thomas K. F. Foo, William H. Perman, Paul R. Moran, Paul A. Bottomley