Patents by Inventor Shiwei Zhou

Shiwei Zhou 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: 11090029
    Abstract: A non-imaging diagnostic ultrasound system for carotid artery diagnosis has a two dimensional array probe (10) with a low element count and relatively large element size which can cover an area of the carotid artery at its bifurcation. The elements are operated independently with no phasing, and detect Doppler flow spatially beneath each element. The system produces maps of carotid blood flow in two or three dimensions and can assemble an extended view of the flow by matching segments of the carotid flow as the probe is moved over the vessel. Once the carotid artery has been localized, the degree of stenosis is assessed by automated measurements of peak systolic velocity and blood flow turbulence.
    Type: Grant
    Filed: July 10, 2014
    Date of Patent: August 17, 2021
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Rajendra Singh Sisodia, Shriram Sethuraman, John Petruzzello, Ajay Anand, Shiwei Zhou, Ramon Quido Erkamp, Nagaraju Bussa, Vikram Basawaraj Patil Okaly, Sushanth Govinahalli Sathyanarayana, Krishnamoorthy Palanisamy
  • Publication number: 20210183141
    Abstract: This application discloses methods, apparatus, and electronic devices for face pose estimation and three-dimensional face reconstruction. The face pose estimation method comprises: acquiring a two-dimensional face image for processing, constructing a three-dimensional face model corresponding to the two-dimensional face image, and determining a face pose of the two-dimensional face image based on face feature points of the three-dimensional face model and face feature points of the two-dimensional face image. With this approach, the face pose estimation is performed based on the three-dimensional face model corresponding to the two-dimensional face image, instead of only based on a three-dimensional average face model. As a result, a high accuracy pose estimation can be obtained even for a face with large-angle and exaggerated facial expressions. Thus, robustness of the pose estimation can be effectively improved.
    Type: Application
    Filed: February 26, 2021
    Publication date: June 17, 2021
    Inventor: Shiwei ZHOU
  • Patent number: 10952699
    Abstract: An ultrasound imaging apparatus (200, 600) may include at least one controller (210, 610) which may be configured to: acquire ultrasound data of an anatomical region-of-interest (ROI), the ultrasound data including at least two frames acquired at different times over an interval of time as a push force is applied to induce movement in the anatomical ROI; determine a correlation between at least two of the acquired frames and form corresponding correlation coefficients; generate a correlation coefficient (CC) map based upon the determined correlation information between the at least two frames; and distinguish fluid from tissue within the CC map based upon a comparison of the correlation coefficients with at least one threshold value.
    Type: Grant
    Filed: December 30, 2016
    Date of Patent: March 23, 2021
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Shiwei Zhou, Balasundar Iyyavu Raju, Shougang Wang, Jingping Xu
  • Patent number: 10945702
    Abstract: A diagnostic ultrasound system for carotid artery diagnosis has a two dimensional array probe with a low element count and relatively large element size which can cover an area of the carotid artery at its bifurcation. The elements are operated independently with no phasing, and detect Doppler flow spatially beneath each element. The system produces maps of carotid blood flow in two or three dimensions and can assemble an extended view of the flow by matching segments of the carotid flow as the probe is moved over the vessel. Once the carotid artery has been localized, the degree of stenosis is assessed by automated measurements of peak systolic velocity and blood flow turbulence.
    Type: Grant
    Filed: July 2, 2014
    Date of Patent: March 16, 2021
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Krishnamoorthy Palanisamy, Sushanth Govinahallisathyanarayana, Rajendra Singh Sisodia, Nagaraju Bussa, Shankar Mosur Venkatesan, Shriram Sethuraman, John Petruzzello, Ajay Anand, Shiwei Zhou, Ramon Quido Erkamp, Vikram Basawaraj Patil Okaly
  • Patent number: 10939894
    Abstract: Ultrasound-based acoustic streaming for deciding whether material is fluid is dependent upon any one or more of a variety of criteria. Examples are displacement, speed, temporal or spatial flow variance, progressive decorrelation, slope or straightness of accumulated signal to background comparisons over time, and relative displacement to adjacent soft tissue. Echogenicity-based area identification is combinable with the above movement characteristic detection in the deciding. Fluid pool identification is performable from the area-limited acoustic streaming testing and ultrasound attenuation readings. Candidates from among the areas are screenable based on specific shapes or bodily organs detected. Natural flow can be excluded from streaming detection by identification of blood vessels. Processing for each FAST ultrasound view, or for the entire procedure, is performable automatically, without need for user intervention or with user intervention to identify suspected areas.
    Type: Grant
    Filed: August 12, 2015
    Date of Patent: March 9, 2021
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Shougang Wang, Balasundar Iyyavu Raju, Shiwei Zhou, Jingping Xu
  • Publication number: 20200268343
    Abstract: An ultrasound imaging apparatus (200, 600) may include at least one controller (210, 610) which may be configured to: acquire ultrasound data of an anatomical region-of-interest (ROI), the ultrasound data including at least two frames acquired at different times over an interval of time as a push force is applied to induce movement in the anatomical ROI; determine a correlation between at least two of the acquired frames and form corresponding correlation coefficients; generate a correlation coefficient (CC) map based upon the determined correlation information between the at least two frames; and distinguish fluid from tissue within the CC map based upon a comparison of the correlation coefficients with at least one threshold value.
    Type: Application
    Filed: December 30, 2016
    Publication date: August 27, 2020
    Inventors: Shiwei Zhou, Balasundar Iyyavu Raju, Shougang Wang, Jingping Xu
  • Patent number: 10729404
    Abstract: The present invention proposes an ultrasound imaging system and method for measuring a property of a region of interest in a subject by using shear wave, wherein an ultrasound probe is configured to sequentially transmit, to each of a plurality of focal spots (320, 322, 324) in the region of interest, a push pulse (310, 312, 314) for generating a shear wave (330, 332, 334), each of the plurality of focal spots having a mutually different depth value (z1, z2, z3), and to receive ultrasound echo signals adjacent (350, 352, 354) to each of the plurality of focal spots; a shear wave detector is configured to derive, for each of the plurality of focal spots, a first parameter indicating a property of the generated shear wave, based on the received ultrasound echo signals; and a property estimator is configured to estimate a second parameter indicating the property of the region of interest as a function of the derived first parameters.
    Type: Grant
    Filed: July 29, 2016
    Date of Patent: August 4, 2020
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Vijay Thakur Shamdasani, Yin Hui Deng, Ying Wu, Hua Xie, Shiwei Zhou
  • Publication number: 20200229798
    Abstract: An ultrasound system and method enable ultrasonic imaging by inexperienced personnel at the home of a patient under the guidance of a remotely located diagnostic imaging expert. Improper use of the scanning device is prevented by allowing the remotely located imaging expert to enable or disable the transmission of ultrasound energy by the ultrasound system. Other functions of the ultrasound system may also be controlled by the remotely located expert, such as determining whether acquired ultrasound images can be viewed locally on the ultrasound system.
    Type: Application
    Filed: February 22, 2018
    Publication date: July 23, 2020
    Inventors: Evgeniy LEYVI, Balasundar Iyyavu RAJU, Shougang WANG, Shiwei ZHOU, Amjad SOOMRO, Sanjay Ramachandra HEGDE
  • Publication number: 20200222027
    Abstract: The embodiments disclose an ultrasound system comprising: a probe configured to obtain ultrasound data relating to a scanning region including at least part of a pleural interface of a lung; and a data analyzer, configured to automatically detect information for determining lung sliding and/or lung point using one or more cross correlation maps derived from the data. The embodiments also disclose a method thereof.
    Type: Application
    Filed: April 2, 2020
    Publication date: July 16, 2020
    Inventors: JINGPING XU, BALASUNDAR IYYAVU RAJU, SHOUGANG WANG, SHIWEI ZHOU
  • Patent number: 10653388
    Abstract: The embodiments disclose an ultrasound system comprising: a probe configured to obtain ultrasound data relating to scanning region including at least part of a pleural interface of a lung; and a data analyzer, configured to automatically detect information for determining lung sliding and/or lung point using one or more cross correlation maps derived from the data. The embodiments also disclose a method thereof.
    Type: Grant
    Filed: September 22, 2015
    Date of Patent: May 19, 2020
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Jingping Xu, Balasundar Iyyavu Raju, Shougang Wang, Shiwei Zhou
  • Patent number: 10588604
    Abstract: Ultrasound motion-estimation includes issuing multiple ultrasound pulses, spaced apart from each other in a propagation direction of a shear wave, to track axial motion caused by the wave. The wave has been induced by an axially-directed push. Based on the motion, autocorrelation is used to estimate an axial displacement. The estimate is used as a starting point (234) in a time-domain based motion tracking algorithm for modifying the estimate so as to yield a modified displacement. The modification can constitute an improvement upon the estimate. The issuing may correspondingly occur from a number of acoustic windows, multiple ultrasound imaging probes imaging respectively via the windows. The autocorrelation, and algorithm, operate specifically on the imaging acquired via the pulses used in tracking the motion caused by the wave that was induced by the push, the push being a single push.
    Type: Grant
    Filed: May 11, 2015
    Date of Patent: March 17, 2020
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Hua Xie, Shiwei Zhou, Jean-Luc Robert, Vijay Thakur Shamdasani
  • Publication number: 20190105013
    Abstract: The present invention proposes an ultrasound system and a method of detecting lung sliding on the basis of a temporal sequence of ultrasound data frames of a first region of interest. The first region of interest includes a pleural interface of a lung. A sub-region identifier (410) is configured to identify, for each of the ultrasound data frames, a sub-region of a scanned region of the ultrasound data frame, the sub-region comprising at least part of the pleural interface; a lung sliding detector (420) is configured to derive a parametric map for the sub-region on the basis of at least two ultrasound data frames of the temporal sequence, parametric values of the parametric map indicating a degree of tissue motion over the at least two ultrasound frames; wherein the lung sliding detector is further configured to extract data of the sub-regions from the at least two ultrasound data frames, and to derive the parametric map on the basis of the extracted data.
    Type: Application
    Filed: March 24, 2017
    Publication date: April 11, 2019
    Inventors: SHOUGANG WANG, BALASUDAR IYYAVU RAJU, JINGPING XU, ANTHONY M. GADES, MCKEE DUNN POLAND, SHIWEI ZHOU
  • Patent number: 10251627
    Abstract: The present invention relates to an ultrasound elastography system (10) for providing an elastography measurement result of an anatomical site (32) a corresponding method. The system (10) is configured to visualize a suitability for shear wave elastography of the region of interest (33) to the user within the ultrasound image (52) and/or to recommend an elastography acquisition plane (48, 50) for conducting shear wave elastography to the user. By this, proper selection of a location for an elastography measurement may be supported.
    Type: Grant
    Filed: June 25, 2014
    Date of Patent: April 9, 2019
    Assignee: KONINKLIJKE PHILIPS N. V.
    Inventors: Vijay Parthasarathy, Hua Xie, Jean-luc Robert, Shiwei Zhou, Vijay Thakur Shamdasani
  • Publication number: 20180344293
    Abstract: Extracorporeal motion (130) relative to a medical subject being imaged is detected, through the imaging or from motion detectors on the imaging probe, and either backed out of the medical images so that it can be determined whether lung sliding exists or measured to determine whether lung sliding detection is to be suspended due to excessive extracorporeal motion. Image sub-regions (164, 168) corresponding to respective ones of the images are selected for image-to-image comparison such that the selected sub-regions contain only body tissue that is, with respect to imaging depth in the acquiring of the images, shallower than an anatomical landmark within the images. Based on a result of the comparing, lung sliding detection that entails examining image data deeper than the landmark may be initialized.
    Type: Application
    Filed: September 13, 2016
    Publication date: December 6, 2018
    Applicant: KONINKLIJKE PHILIPS N.V.
    Inventors: Balasundar Iyyavu Raju, Jingping Xu, Shougang Wang, Shiwei Zhou, Anthony M. Gades
  • Publication number: 20180228463
    Abstract: The present invention proposes an ultrasound imaging system and method for measuring a property of a region of interest in a subject by using shear wave, wherein an ultrasound probe is configured to sequentially transmit, to each of a plurality of focal spots (320, 322, 324) in the region of interest, a push pulse (310, 312, 314) for generating a shear wave (330, 332, 334), each of the plurality of focal spots having a mutually different depth value (z1, z2, z3), and to receive ultrasound echo signals adjacent (350, 352, 354) to each of the plurality of focal spots; a shear wave detector is configured to derive, for each of the plurality of focal spots, a first parameter indicating a property of the generated shear wave, based on the received ultrasound echo signals; and a property estimator is configured to estimate a second parameter indicating the property of the region of interest 342 as a function of the derived first parameters.
    Type: Application
    Filed: July 29, 2016
    Publication date: August 16, 2018
    Applicant: Koninklijke Philips N.V.
    Inventors: VIJAY THAKUR SHAMDASANI, YIN HUI DENG, YING WU, HUA XIE, SHIWEI ZHOU
  • Patent number: 9918696
    Abstract: Existing gas pocket detection approaches are based on visual observations of B-mode ultrasound images showing comparisons between normal soft tissue and gas pockets, which are time-consuming and dependent on operator experience. The present invention proposes an ultrasound system and a method of detecting a gas pocket. The ultrasound system comprises: an ultrasound probe (110) for transmitting an ultrasound signal toward the ROI and acquiring an ultrasound echo signal reflected from the ROI along a plurality of scanning lines; an obtaining unit (130) for obtaining a second harmonic component of the ultrasound echo signal for each depth of a plurality of depths along each scanning line of the plurality of scanning lines; and a deriving unit (140) for deriving a change in a center frequency of the second harmonic component along with the depth.
    Type: Grant
    Filed: January 13, 2015
    Date of Patent: March 20, 2018
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Jingping Xu, Balasundar Iyyavu Raju, Sheng-Wen Huang, Shougang Wang, Emil George Radulescu, Shiwei Zhou
  • Publication number: 20170273658
    Abstract: Ultrasound-based acoustic streaming for deciding whether material is fluid is dependent upon any one or more of a variety of criteria. Examples are displacement, speed (230), temporal or spatial flow variance, progressive decorrelation, slope or straightness of accumulated signal to background comparisons over time, and relative displacement to adjacent soft tissue. Echogenicity-based area identification is combinable with the above movement characteristic detection in the deciding. Fluid pool identification is performable from the area-limited acoustic streaming testing and ultrasound attenuation readings. Candidates from among the areas (210) are screenable based on specific shapes or bodily organs detected. Natural flow can be excluded from streaming detection by identification of blood vessels (206). Processing for each FAST ultrasound view (202), or for the entire procedure, is performable automatically, without need for user intervention or with user intervention to identify suspected areas.
    Type: Application
    Filed: August 12, 2015
    Publication date: September 28, 2017
    Inventors: Shougang Wang, Balasundar Iyyavu Raju, Shiwei Zhou, Jingping Xu
  • Publication number: 20170273659
    Abstract: The embodiments disclose an ultrasound system comprising: a probe configured to obtain ultrasound data relating to scanning region including at least part of a pleural interface of a lung; and a data analyzer, configured to automatically detect information for determining lung sliding and/or lung point using one or more cross correlation maps derived from the data. The embodiments also disclose a method thereof.
    Type: Application
    Filed: September 22, 2015
    Publication date: September 28, 2017
    Applicant: KONINKLIJKE PHILIPS N.V.
    Inventors: JINGPING XU, BALASUNDAR IYYAVU RAJU, SHOUGANG WANG, SHIWEI ZHOU
  • Publication number: 20170188997
    Abstract: In a diagnostic scanner for shear wave elastography imaging an ultrasound exposure safety processoris is configured for spatially relating respective definitions of an imaging zone (324), and an extended dead-tissue zone (312) that includes both a dead-tissue zone and a surrounding margin. Based on whether a push pulse focus (344, 348, 352) is to be within the extended dead-tissue zone, the processor automatically decides as to a level of acoustic power with which the pulse is to be produced. If it is to be within, the pulse may be produced with a mechanical index, a thermal index, and/or a spatial-peak-temporal-average intensity that exceeds respectively 1.9, 6.0 and 720 milliwatts per square centimeter. The imaging zone may be definable interactively so as to dynamically trigger the deciding and the producing, with optimal push pulse settings being dynamically derived automatically, without the need for user intervention.
    Type: Application
    Filed: June 15, 2015
    Publication date: July 6, 2017
    Applicant: KONINKLIJKE PHILIPS N.V.
    Inventors: Hua Xie, Shiwei Zhou, Jean-luc Robert, Vijay Thakur Shamdasani, Sheng-Wen Huang
  • Publication number: 20170079620
    Abstract: Ultrasound motion-estimation includes issuing multiple ultrasound pulses, spaced apart from each other in a propagation direction of a shear wave, to track axial motion caused by the wave. The wave has been induced by an axially-directed push. Based on the motion, autocorrelation is used to estimate an axial displacement. The estimate is used as a starting point (234) in a time-domain based motion tracking algorithm for modifying the estimate so as to yield a modified displacement. The modification can constitute an improvement upon the estimate. The issuing may correspondingly occur from a number of acoustic windows, multiple ultrasound imaging probes imaging respectively via the windows. The autocorrelation, and algorithm, operate specifically on the imaging acquired via the pulses used in tracking the motion caused by the wave that was induced by the push, the push being a single push.
    Type: Application
    Filed: May 11, 2015
    Publication date: March 23, 2017
    Inventors: Hua Xie, Shiwei Zhou, Jean-Luc Robert, Vijay Thakur Shamdasani