Patents by Inventor John P. Scheib

John P. Scheib 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: 5682896
    Abstract: A computer implemented method and apparatus for generating a vascular volume flow measurement in a living subject using an ultrasonic system by determining a velocity measurement and an area measurement at the same location in a blood vessel. The present invention generates an angle correct cursor on a display indicating where in a vessel a velocity measurement is being obtained. A diameter measure cursor is fixed perpendicular to the angle correct cursor to determine a diameter of the vessel at the same location of the vessel where the velocity measurement is obtained. The diameter is multiplied with the time averaged means velocity to accurately generate the volume flow. In one embodiment, the length of the diameter measure cursor is adjustable to extend a first end and an opposing second end of the diameter measure cursor, approximately to the walls of the vessel.
    Type: Grant
    Filed: March 28, 1996
    Date of Patent: November 4, 1997
    Assignee: Diasonics Ultrasound, Inc.
    Inventors: John P. Scheib, Cindy A. Owen
  • Patent number: 5628321
    Abstract: A method and apparatus in an ultrasonic system for determining an optimum cardiac cycle of a living subject, and for performing vascular measurements. Peak velocities of a spectra of echoes over a period of time due to pulses emitted into a subject under examination are determined. Based upon the peak velocities of the spectra over the period of time, a time series of the peak velocities are determined representing an optimum cardiac cycle. In addition, vascular measurements of the peak velocities for the optimum cardiac cycle can be determined from the optimum cardiac cycle. The peak velocities of the spectra can be performed by dividing the spectra in a plurality of regions according to ranges of the velocity information. A threshold magnitude of the peak velocities is determined by adding a predetermined value to a minimum magnitude.
    Type: Grant
    Filed: December 18, 1995
    Date of Patent: May 13, 1997
    Assignee: Diasonics Ultrasound, Inc.
    Inventors: John P. Scheib, Sheng-Tz Lin
  • Patent number: 5482044
    Abstract: A direct digital demodulator for demodulating ultrasound signals. The demodulator includes a baseband demodulator, a magnitude and differential phase generator, and a Doppler preprocessor. The demodulator further includes an interface for receiving a signal from an analog front end. The baseband demodulator utilizes a Hilbert transform to convert received ultrasound signals into analytic signals. The present invention compensates phase and frequency of the analytic signal in order to process the signal. The phase information in the signal is then extracted.
    Type: Grant
    Filed: January 14, 1992
    Date of Patent: January 9, 1996
    Assignee: Diasonics Ultrasound, Inc.
    Inventors: Sheng-Tz Lin, John P. Scheib
  • Patent number: 5437281
    Abstract: A direct digital modulator for demodulating ultrasound signals. The demodulator includes a baseband demodulator, a magnitude and differential phase generator, and a Doppler preprocessor. The demodulator further includes an interface for receiving a signal from an analog front end. The baseband demodulator utilizes a Hilbert transform to convert received ultrasound signals into analytic signals. The present invention compensates phase and frequency of the analytic signal in order to process the signal. The phase information in the signal is then extracted.
    Type: Grant
    Filed: May 4, 1994
    Date of Patent: August 1, 1995
    Assignee: Diasonics Ultrasound, Inc.
    Inventors: Sheng-Tz Lin, John P. Scheib