Patents by Inventor Ann Lindsay Hall

Ann Lindsay Hall 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).

  • Ultrasound imaging using coded excitation on transmit and selective filtering of fundamental and (sub)harmonic signals on receive
    Patent number: 5980459
    Abstract: A method and an apparatus for selectively performing contrast harmonic imaging, tissue harmonic imaging and B-mode flow imaging with an ultrasound imaging system utilizes phase-coded excitation on transmit and selective firing-to-firing, i.e., "slow-time", filtering on receive. "Slow-time" filtering in combination with transmit phases which change over the set of transmit firings results in different effective "slow-time" filters corresponding to the different harmonic modes within the reflected signal. The transmit phases and the "slow-time" filter weightings are designed to selectively enhance the desired modes while substantially suppressing other modes.
    Type: Grant
    Filed: March 31, 1998
    Date of Patent: November 9, 1999
    Assignee: General Electric Company
    Inventors: Richard Yung Chiao, Ann Lindsay Hall, Kai Erik Thomenius