Patents by Inventor Wiliam S. Percival

Wiliam S. Percival 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).

  • Imaging systems
    Patent number: 4254778
    Abstract: In an apparatus for examining human bodies by nuclear magnetic resonance to produce images of cross-sectional slices of such bodies, it is desirable to reduce the recovery time between scans at different angles. A suitable pulse sequence for examination with minimum dispersion is disclosed. Repetition of the sequence with inverted pulses to drive the spins back to equilibrium and reduce recovery time is also disclosed.
    Type: Grant
    Filed: May 22, 1979
    Date of Patent: March 10, 1981
    Assignee: EMI Limited
    Inventors: Hugh Clow, Peter E. Walters, Wiliam S. Percival