Patents by Inventor Fang Dong

Fang Dong 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).

  • Publication number: 20220057466
    Abstract: The disclosure relates to magnetic resonance imaging triggered by a prospective acquisition correction sequence. The technique comprises determining repetition time and an acquisition window time of a single-shot fast spin echo sequence; determining the maximum imaging layer number N in each physiological movement cycle on the basis of the acquisition window time and the repetition time, where N is a positive integer greater than or equal to 2; and enabling the single-shot fast spin echo sequence to obtain M layers of imaging data within at least one acquisition window time when the prospective acquisition correction sequence generates a trigger signal, where M is a positive integer greater than or equal to 2 and less than or equal to N. According to the present disclosure, a plurality of layers of imaging data are obtained within a single acquisition window time, thereby increasing a scanning speed and shortening imaging time.
    Type: Application
    Filed: August 18, 2021
    Publication date: February 24, 2022
    Applicant: Siemens Healthcare GmbH
    Inventors: Yu Yu Wang, Fang Dong
  • Publication number: 20220057465
    Abstract: A signal processing method including receiving an original reference radio frequency signal from a receiving antenna group; receiving the time series of the control signal associated with the transmission event of the radio frequency pulses; synchronizing the time series with the original reference radio frequency signal, and determining the echo train in the original reference radio frequency signal in a repetition time of the pulse sequence, wherein the echo train corresponds to the part of the time series associated with the transmission event of the radio frequency pulses in time sequence; setting the sampling points in the domains of the starting point and a first ending point of the echo train; and generating a fitting signal based on the sampling points to eliminate the radio frequency interference signal resulted from the transmission event of the radio frequency pulses.
    Type: Application
    Filed: August 18, 2021
    Publication date: February 24, 2022
    Applicant: Siemens Healthcare GmbH
    Inventors: Shu Qun Xie, Yan Tu Huang, Fang Dong
  • Publication number: 20210378603
    Abstract: The disclosure relates to techniques for triggering magnetic resonance data acquisition. The techniques include detecting a respiration direction of a respiration signal of an acquisition subject, predicting in real time an amplitude peak value of an expiration signal in the current respiration period according to the real-time respiration signal of the acquisition subject, multiplying the amplitude peak value by a preset coefficient, and using the product as a trigger point threshold of the current respiration period. When it is determined that an expiration stage of the current respiration period is starting, the techniques also include calculating in real time or periodically the absolute value of the difference between the amplitude of the current expiration signal and the trigger point threshold currently calculated, and if the absolute value of the difference is less than a preset difference threshold, then triggering MR data acquisition.
    Type: Application
    Filed: June 3, 2021
    Publication date: December 9, 2021
    Applicant: Siemens Healthcare GmbH
    Inventors: Jin Qiang He, Fang Dong, De He Weng
  • Publication number: 20210349297
    Abstract: The invention relates to a light shielding device for a microscope and a microscope including the same. In the microscope, transmitting illumination light from a transmitting illumination light source (1) is irradiated from above a stage (3) to a specimen on the stage and fluorescent illumination light from a fluorescent illumination light source is irradiated from below the stage to the specimen on the stage. The light shielding device (20) may be mounted to a lower end portion of a condenser (2) of the microscope to at least partially block ambient light entering an objective (4) of the microscope. The light shielding device may comprise a light shield (21) and a mounting mechanism configured to mount the light shield below the lower end portion of the condenser in a manually removable manner, and/or the light shield comprises a through hole (23) and a light shielding portion surrounding the through hole.
    Type: Application
    Filed: July 23, 2021
    Publication date: November 11, 2021
    Inventors: Jing LI, Fang DONG, Junjie CAO, Xingbiao GU, Shukuan XU
  • Publication number: 20210173032
    Abstract: In a short T2 tissue imaging method and system, a magnetic resonance image is acquired that includes a short T2 tissue based on point-wise encoding time reduction with radial acquisition point-wise encoding time reduction with radial acquisition (PETRA) sequences, to obtain a first image, a T2 preparation pulse cluster is applied for suppressing a short T2 tissue signal between the PETRA sequences according to a predetermined interval of applying the T2 preparation pulse cluster, a magnetic resonance image is acquired that excludes the short T2 tissue based on the PETRA sequences applied with the T2 preparation pulse cluster, to obtain a second image; and a magnetic resonance image of the short T2 tissue is obtained based on the second image and the first image (e.g. by subtracting the second image from the first image).
    Type: Application
    Filed: December 9, 2020
    Publication date: June 10, 2021
    Applicant: Siemens Healthcare GmbH
    Inventors: Fang Dong, Kun Zhou
  • Publication number: 20210052187
    Abstract: The present disclosure provides techniques for determining a respiration phase by extracting a distance characteristic value, a score characteristic value, and an area characteristic value from the respiration signal, wherein the distance characteristic value, the score characteristic value and the area characteristic value are used to indicate waveform variation between two adjacent waveforms in the respiration signal. The techniques include training a respiration signal model according to the distance characteristic value, the score characteristic value, and the area characteristic value to determine the respiration phase of the respiration signal using the respiration signal model.
    Type: Application
    Filed: August 20, 2020
    Publication date: February 25, 2021
    Applicant: Siemens Healthcare GmbH
    Inventors: Jin Qiang He, De He Weng, Shu Qun Xie, Fang Dong
  • Patent number: 10928476
    Abstract: In a magnetic resonance readout-segmented diffusion-weighted imaging method, apparatus, and storage medium, a non-linear phase RF excitation pulse is applied to nuclear spins that exhibit a magnetization intensity vector, and applying, in a slice selection direction, a slice selection gradient pulse of duration corresponding to the non-linear phase RF excitation pulse, so as to flip the magnetization intensity vector into the X-Y plane. Diffusion weighting is performed on the magnetization intensity vector flipped into the X-Y plane. A readout-segmented sampling sequence is executed to read out raw data in a segmented manner from the magnetization intensity vector resulting from diffusion weighting. A view angle tilting gradient pulse is applied in the slice selection direction.
    Type: Grant
    Filed: June 13, 2018
    Date of Patent: February 23, 2021
    Assignee: Siemens Healthcare GmbH
    Inventors: Wei Liu, Kun Zhou, Fang Dong
  • Patent number: 10667760
    Abstract: In a method and magnetic resonance (MR) apparatus for heart diffusion imaging, when an ECG trigger signal by a computer that operates an MR scanner, the MR scanner is operated to acquire a navigator echo before a stimulated echo sequence, in order to detect diaphragm position information. When the first diaphragm position information is not located in an acquisition window, the stimulated echo sequence is not executed, and the computer waits to receive the next ECG trigger signal. The detection time of the navigator echo after the stimulated echo sequence as well as the acquisition time of the stimulated echo sequence, are thus eliminated when the first diaphragm position information does not meet requirements, so can significantly reduce scanning time, and increase the image SNR.
    Type: Grant
    Filed: March 22, 2017
    Date of Patent: June 2, 2020
    Assignee: Siemens Healthcare GmbH
    Inventors: Jing An, Fang Dong, Zhi Guo Sun, Yu Yu Wang, Qiong Zhang
  • Patent number: 10598749
    Abstract: In an RF spoiling method and apparatus for rapid spatial saturation in magnetic resonance imaging, a first RF pulse of a spatial saturation module is applied, and a first set of RF pulses of an imaging sequence is applied after the first RF pulse. A phase of an RF pulse, closest to the first RF pulse in the time dimension, in the first set of RF pulses is not coherent with a phase of the first RF pulse. This makes a phase cycle of the spatial saturation module and a phase cycle of the imaging sequence independent of each other, so the coherence of residual signals in the transverse plane can be destroyed more effectively, thereby reducing artefacts, and improving imaging quality.
    Type: Grant
    Filed: April 26, 2018
    Date of Patent: March 24, 2020
    Assignee: Siemens Healthcare GmbH
    Inventors: Kun Zhou, Fang Dong, Nan Xiao
  • Publication number: 20180356487
    Abstract: In a magnetic resonance readout-segmented diffusion-weighted imaging method, apparatus, and storage medium, a non-linear phase RF excitation pulse is applied to nuclear spins that exhibit a magnetization intensity vector, and applying, in a slice selection direction, a slice selection gradient pulse of duration corresponding to the non-linear phase RF excitation pulse, so as to flip the magnetization intensity vector into the X-Y plane. Diffusion weighting is performed on the magnetization intensity vector flipped into the X-Y plane. A readout-segmented sampling sequence is executed to read out raw data in a segmented manner from the magnetization intensity vector resulting from diffusion weighting. A view angle tilting gradient pulse is applied in the slice selection direction.
    Type: Application
    Filed: June 13, 2018
    Publication date: December 13, 2018
    Applicant: Siemens Healthcare GmbH
    Inventors: Wei Liu, Kun Zhou, Fang Dong
  • Publication number: 20180313924
    Abstract: In an RF spoiling method and apparatus for rapid spatial saturation in magnetic resonance imaging, a first RF pulse of a spatial saturation module is applied, and a first set of RF pulses of an imaging sequence is applied after the first RF pulse. A phase of an RF pulse, closest to the first RF pulse in the time dimension, in the first set of RF pulses is not coherent with a phase of the first RF pulse. This makes a phase cycle of the spatial saturation module and a phase cycle of the imaging sequence independent of each other, so the coherence of residual signals in the transverse plane can be destroyed more effectively, thereby reducing artefacts, and improving imaging quality.
    Type: Application
    Filed: April 26, 2018
    Publication date: November 1, 2018
    Applicant: Siemens Healthcare GmbH
    Inventors: Kun Zhou, Fang Dong, Nan Xiao
  • Publication number: 20170273638
    Abstract: In a method and magnetic resonance (MR) apparatus for heart diffusion imaging, when an ECG trigger signal by a computer that operates an MR scanner, the MR scanner is operated to acquire a navigator echo before a stimulated echo sequence, in order to detect diaphragm position information. When the first diaphragm position information is not located in an acquisition window, the stimulated echo sequence is not executed, and the computer waits to receive the next ECG trigger signal. The detection time of the navigator echo after the stimulated echo sequence as well as the acquisition time of the stimulated echo sequence, are thus eliminated when the first diaphragm position information does not meet requirements, so can significantly reduce scanning time, and increase the image SNR.
    Type: Application
    Filed: March 22, 2017
    Publication date: September 28, 2017
    Applicant: Siemens Shenzhen Magnetic Resonance Ltd.
    Inventors: Jing An, Fang Dong, Zhi Guo Sun, Yu Yu Wang, Qiong Zhang
  • Patent number: 9753473
    Abstract: Aspects of the present invention include a low-dropout (LDO) linear power supply system. The system includes a pass-element configured to generate an output voltage at an output based on an input voltage. The system also includes a compensation amplifier stage coupled to the output and configured to provide frequency compensation and provide a desired frequency response of the output voltage. The system further includes a gain amplifier stage interconnecting the compensation amplifier stage and the pass-element and configured to provide DC gain scaling to generate the output voltage substantially proportional to the input voltage within a given range of the input voltage.
    Type: Grant
    Filed: October 2, 2012
    Date of Patent: September 5, 2017
    Assignee: Northrop Grumman Systems Corporation
    Inventors: Fang Dong Tan, Jeff Zee
  • Patent number: 9330177
    Abstract: A system, method and device for the internet search based on the peer-to-peer network are provided. A search terminal is set up in each search peer to form a peer-to-peer network. The search request is sent from an original search peer to other search peers progressively via the broadcast/back-propagation mechanism of the peer-to-peer network. Each search peer responds the search request separately, and searches its local index library. The search results of all search peers are gathered in the original search peer, and the original search peer aggregates and sorts the search results. Such search system structure and method have made a complete breakthrough from the architecture of existing search systems, and have provided novelty architecture of the search system, which thoroughly solves the high workload of the search engine server in existing technologies.
    Type: Grant
    Filed: February 25, 2013
    Date of Patent: May 3, 2016
    Assignee: DONG SOFTWARE STUDIO BEIJING
    Inventor: Fang Dong
  • Publication number: 20140244609
    Abstract: A system, method and device for the internet search based on the peer-to-peer network are provided. A search terminal is set up in each search peer to form a peer-to-peer network. The search request is sent from an original search peer to other search peers progressively via the broadcast/back-propagation mechanism of the peer-to-peer network. Each search peer responds the search request separately, and searches its local index library. The search results of all search peers are gathered in the original search peer, and the original search peer aggregates and sorts the search results. Such search system structure and method have made a complete breakthrough from the architecture of existing search systems, and have provided novelty architecture of the search system, which thoroughly solves the high workload of the search engine server in existing technologies.
    Type: Application
    Filed: February 25, 2013
    Publication date: August 28, 2014
    Inventor: FANG DONG
  • Publication number: 20140091775
    Abstract: Aspects of the present invention include a low-dropout (LDO) linear power supply system. The system includes a pass-element configured to generate an output voltage at an output based on an input voltage. The system also includes a compensation amplifier stage coupled to the output and configured to provide frequency compensation and provide a desired frequency response of the output voltage. The system further includes a gain amplifier stage interconnecting the compensation amplifier stage and the pass-element and configured to provide DC gain scaling to generate the output voltage substantially proportional to the input voltage within a given range of the input voltage.
    Type: Application
    Filed: October 2, 2012
    Publication date: April 3, 2014
    Applicant: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventors: FANG DONG TAN, JEFF ZEE
  • Patent number: 8363917
    Abstract: A CT system includes a generator configured to energize an x-ray source to a first kilovoltage (kVp) and to a second kVp, and a computer that is programmed to acquire a first view dataset with the x-ray source energized to the first kVp and a second view dataset with the x-ray source energized to the second kVp, generate a base correction image using the first view dataset and the second view dataset, and reconstruct a pair of base material images from the first view dataset and from the second view dataset. The computer is also programmed to estimate artifact correlation in the pair of base material images using the base correction image, generate a pair of final base material images and a final monochromatic image, and correct one of the pair of final base material images and the final monochromatic image at a keV value using the estimated artifact correlation.
    Type: Grant
    Filed: October 14, 2009
    Date of Patent: January 29, 2013
    Assignee: General Electric Company
    Inventors: Jiahua Fan, Naveen Chandra, Andrew Johnson, Jiang Hsieh, Fang Dong, Mary Sue Kulpins, Peter Crandall
  • Patent number: 8131042
    Abstract: A method for reconstructing an image using an imaging apparatus that includes a radiation source, a detector array, and a computer. The method includes performing a helical scan of an object at a selected helical pitch using the radiation source and detector array to obtain image data, and reconstructing an image of the object utilizing the computer programmed to perform a hybrid cone beam image reconstruction having ray-wise 3D weighting, wherein the weighting is dependent upon both helical pitch and z-distance.
    Type: Grant
    Filed: February 8, 2008
    Date of Patent: March 6, 2012
    Assignee: General Electric Company
    Inventors: Xiangyang Tang, Jiang Hsieh, Fang Dong, Jiahua Fan, Thomas Louis Toth
  • Publication number: 20110085719
    Abstract: A CT system includes a generator configured to energize an x-ray source to a first kilovoltage (kVp) and to a second kVp, and a computer that is programmed to acquire a first view dataset with the x-ray source energized to the first kVp and a second view dataset with the x-ray source energized to the second kVp, generate a base correction image using the first view dataset and the second view dataset, and reconstruct a pair of base material images from the first view dataset and from the second view dataset. The computer is also programmed to estimate artifact correlation in the pair of base material images using the base correction image, generate a pair of final base material images and a final monochromatic image, and correct one of the pair of final base material images and the final monochromatic image at a keV value using the estimated artifact correlation.
    Type: Application
    Filed: October 14, 2009
    Publication date: April 14, 2011
    Inventors: Jiahua Fan, Naveen Chandra, Andrew Johnson, Jiang Hsieh, Fang Dong, Mary Sue Kulpins, Peter Crandall
  • Patent number: 7824862
    Abstract: The present invention relates to methods and compositions for analyzing nucleic acids. In particular, the present invention provides methods and compositions for the detection and characterization of nucleic acid sequences and sequence changes. The methods of the present invention permit the detection and/or identification of genetic polymorphism such as those associated with human disease and permit the identification of pathogens (e.g., viral and bacterial strain identification).
    Type: Grant
    Filed: September 30, 2008
    Date of Patent: November 2, 2010
    Assignee: Third Wave Technologies, Inc.
    Inventors: Fang Dong, Victor I. Lyamichev, James R. Prudent, Lance Fors, Bruce P. Neri, Mary Ann D. Brow, Todd A. Anderson, James E. Dahlberg