Patents by Inventor Chiye Li

Chiye Li 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: 11925472
    Abstract: The present disclosure describes a fast-scanning optical-resolution photoacoustic (fsOR-PAE) endoscope for imaging vasculature within tissues in vivo that includes an ultrasonic transducer and a scanning mirror within a lumen of an elongate casing. The scanning mirror is configured to direct the laser pulses from the pulsed laser source to a focal spot outside the casing in a scanning pattern via an imaging window formed in the casing. The scanning mirror is further configured to direct a plurality of photoacoustic signals from the focal spot to the ultrasonic transducer via the imaging window.
    Type: Grant
    Filed: December 22, 2020
    Date of Patent: March 12, 2024
    Assignees: Washington University, California Institute of Technology
    Inventors: Lihong Wang, Konstantin Maslov, Methodius Tuuli, Molly Stout, George Macones, Chiye Li, Junhui Shi, Yuan Qu
  • Publication number: 20230056880
    Abstract: A pressing position and pressure measurement method based on PPG (photoplethysmographic) imaging, which only needs a camera to locate multiple pressing areas and measure corresponding pressure values without a pressure sensor. Before the measurement starts, only a simple calibration work is needed. With the gradual increase of the pressing pressure, the characteristics of PPG signals corresponding to diastolic pressure and systolic pressure will disappear one by one, and by recording two sets of pressure values and the corresponding PPG signal intensity values, the relation curve of the pressure versus blood perfusion changes can be fitted. Through this relation curve, the pressure values corresponding to different blood PPG signal intensities can be obtained. Different from the traditional technical route, the present disclosure provides a non-contact measurement method for determining the pressing location and measuring the pressure through a camera.
    Type: Application
    Filed: November 3, 2022
    Publication date: February 23, 2023
    Inventors: Ruofan WANG, Chiye LI, Junhui SHI
  • Publication number: 20210186411
    Abstract: The present disclosure describes a fast-scanning optical-resolution photoacoustic (fsOR-PAE) endoscope for imaging vasculature within tissues in vivo that includes an ultrasonic transducer and a scanning mirror within a lumen of an elongate casing. The scanning mirror is configured to direct the laser pulses from the pulsed laser source to a focal spot outside the casing in a scanning pattern via an imaging window formed in the casing. The scanning mirror is further configured to direct a plurality of photoacoustic signals from the focal spot to the ultrasonic transducer via the imaging window.
    Type: Application
    Filed: December 22, 2020
    Publication date: June 24, 2021
    Applicants: Washington University, California Institute of Technology
    Inventors: Lihong Wang, Konstantin Maslov, Methodius Tuuli, Molly Stout, George Macones, Chiye Li, Junhui Shi, Yuan Qu