Patents by Inventor Cheri Xiaoyu Deng

Cheri Xiaoyu Deng 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: 8152723
    Abstract: An ultrasound system is provided which includes a therapy ultrasound transducer and a diagnostic ultrasound transducer and operates in accordance with a method to direct the application of the therapy ultrasound. The method includes operating the diagnostic ultrasound transducer to acquire a first ultrasound image; simultaneously operating the diagnostic ultrasound transducer and therapy ultrasound transducer for a second interval to acquire a second ultrasound image; and determining a difference in the first and second images indicative of the pattern of the therapy ultrasound transducer signal. The difference in the images, which result from enhanced non-linearities and propagation distortions induced by the high intensity therapy ultrasound, can be obtained by subtracting the two images.
    Type: Grant
    Filed: July 22, 2009
    Date of Patent: April 10, 2012
    Assignee: Riverside Research Institute
    Inventors: Frederic Louis Lizzi, Cheri Xiaoyu Deng
  • Publication number: 20090287082
    Abstract: An ultrasound system is provided which includes a therapy ultrasound transducer and a diagnostic ultrasound transducer and operates in accordance with a method to direct the application of the therapy ultrasound. The method includes operating the diagnostic ultrasound transducer to acquire a first ultrasound image; simultaneously operating the diagnostic ultrasound transducer and therapy ultrasound transducer for a second interval to acquire a second ultrasound image; and determining a difference in the first and second images indicative of the pattern of the therapy ultrasound transducer signal. The difference in the images, which result from enhanced non-linearities and propagation distortions induced by the high intensity therapy ultrasound, can be obtained by subtracting the two images.
    Type: Application
    Filed: July 22, 2009
    Publication date: November 19, 2009
    Inventors: Frederic Louis Lizzi, Cheri Xiaoyu Deng
  • Publication number: 20040158152
    Abstract: An ultrasound system is provided which includes a therapy ultrasound transducer and a diagnostic ultrasound transducer and operates in accordance with a method to direct the application of the therapy ultrasound. The method includes operating the diagnostic ultrasound transducer to acquire a first ultrasound image; simultaneously operating the diagnostic ultrasound transducer and therapy ultrasound transducer for a second interval to acquire a second ultrasound image; and determining a difference in the first and second images indicative of the pattern of the therapy ultrasound transducer signal. The difference in the images, which result from enhanced non-linearities and propagation distortions induced by the high intensity therapy ultrasound, can be obtained by subtracting the two images.
    Type: Application
    Filed: February 5, 2004
    Publication date: August 12, 2004
    Inventors: Frederic Louis Lizzi, Cheri Xiaoyu Deng
  • Patent number: 6726627
    Abstract: An ultrasound system is provided which includes a therapy ultrasound transducer and a diagnostic ultrasound transducer and operates in accordance with a method to direct the application of the therapy ultrasound. The method includes operating the diagnostic ultrasound transducer to acquire a first ultrasound image; simultaneously operating the diagnostic ultrasound transducer and therapy ultrasound transducer for a second interval to acquire a second ultrasound image; and determining a difference in the first and second images indicative of the pattern of the therapy ultrasound transducer signal. The difference in the images, which result from enhanced non-linearities and propagation distortions induced by the high intensity therapy ultrasound, can be obtained by subtracting the two images.
    Type: Grant
    Filed: January 24, 2003
    Date of Patent: April 27, 2004
    Assignee: Riverside Research Institute
    Inventors: Frederic Louis Lizzi, Cheri Xiaoyu Deng
  • Patent number: 6533726
    Abstract: An ultrasound system is provided which includes a therapy ultrasound transducer and a diagnostic ultrasound transducer and operates in accordance with a method to direct the application of the therapy ultrasound. The method includes operating the diagnostic ultrasound transducer to acquire a first ultrasound image; simultaneously operating the diagnostic ultrasound transducer and therapy ultrasound transducer for a second interval to acquire a second ultrasound image; and determining a difference in the first and second images indicative of the pattern of the therapy ultrasound transducer signal. The difference in the images, which result from enhanced non-linearities and propagation distortions induced by the high intensity therapy ultrasound, can be obtained by subtracting the two images.
    Type: Grant
    Filed: August 8, 2000
    Date of Patent: March 18, 2003
    Assignee: Riverside Research Institute
    Inventors: Frederic Louis Lizzi, Cheri Xiaoyu Deng
  • Patent number: 6423007
    Abstract: The concentration and/or radii of a contrast agent in a fluid can be estimated by acquiring ultrasound spectral data, performing spectral analysis to generate a linear estimation of the power spectrum, and correlating at least one spectral parameter to a predetermined distribution function for the contrast agent. If the mean radius squared of particles is known, then the concentration of contrast agent particles can be calculated. If the concentration is constant, then relative variations in mean radius squared can be determined.
    Type: Grant
    Filed: December 11, 2000
    Date of Patent: July 23, 2002
    Assignee: Riverside Research Institute
    Inventors: Frederic Louis Lizzi, Cheri Xiaoyu Deng
  • Patent number: 6312383
    Abstract: A dual-frequency band ultrasonic apparatus provides a first ultrasound signal to a region at a first frequency band and a second ultrasound signal at a second frequency band for monitoring the region. A processor controls the first and second ultrasound signals such that a predetermined phase relationship is achieved between the first frequency band signal and the second frequency band signal. The apparatus can employ a single transducer operable at both frequency bands or separate transducers for the first and second frequency bands.
    Type: Grant
    Filed: December 11, 2000
    Date of Patent: November 6, 2001
    Assignee: Riverside Research Institute
    Inventors: Frederic Louis Lizzi, Cheri Xiaoyu Deng
  • Publication number: 20010001108
    Abstract: The concentration and/or radii of a contrast agent in a fluid can be estimated by acquiring ultrasound spectral data, performing spectral analysis to generate a linear estimation of the power spectrum, and correlating at least one spectral parameter to a predetermined distribution function for the contrast agent. If the mean radius squared of particles is known, then the concentration of contrast agent particles can be calculated. If the concentration is constant, then relative variations in mean radius squared can be determined.
    Type: Application
    Filed: December 11, 2000
    Publication date: May 10, 2001
    Applicant: Riverside Research Institute
    Inventors: Frederic Louis Lizzi, Cheri Xiaoyu Deng
  • Patent number: 6186951
    Abstract: Fluid flow rate and perfusion rate are measured using ultrasound techniques by introducing a contrast agent into a fluid stream and then selectively modifying the contrast agent particles within a target area by the application of a focused pulse of relatively low frequency ultrasonic energy, thus creating a zone of reduced backscatter in the target area. The restoration of the zone of reduced backscatter or the movement of the zone of reduced backscatter is monitored, preferably using high frequency ultrasound, to determine the flow rate or perfusion rate of the fluid. Spectral parameters of ultrasound return signals are evaluated to determine an estimate of contrast agent concentration and/or mean particle size.
    Type: Grant
    Filed: May 26, 1999
    Date of Patent: February 13, 2001
    Assignee: Riverside Research Institute
    Inventors: Frederic Louis Lizzi, Cheri Xiaoyu Deng