Patents by Inventor Yuxiang Xing

Yuxiang Xing 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: 10896527
    Abstract: A method and device for reconstructing a CT image and a storage medium are disclosed. CT scanning is performed on an object to be inspected to obtain projection data. The projection data is processed using a first convolutional neural network to obtain processed projection data. The first convolutional neural network comprises a plurality of convolutional layers. A back-projection operation is performed on the processed projection data to obtain a reconstructed image.
    Type: Grant
    Filed: July 25, 2018
    Date of Patent: January 19, 2021
    Assignees: Tsinghua University, NUCTECH COMPANY LIMITED
    Inventors: Yuxiang Xing, Li Zhang, Jianmin Li, Zhiqiang Chen, Jianping Gu
  • Patent number: 10769821
    Abstract: A method and device for reconstructing a CT image and a storage medium are disclosed. CT scanning is performed on an object to be inspected to obtain projection data on a first scale. Projection data on a plurality of other scales is generated from the projection data on the first scale. Projection data on each scale is processed on the corresponding scale by using a first convolutional neural network to obtain processed projection data, and a back-projection operation is performed on the processed projection data to obtain a CT image on the corresponding scale. CT images on the plurality of scales are fused to obtain a reconstructed image of the object to be inspected.
    Type: Grant
    Filed: July 25, 2018
    Date of Patent: September 8, 2020
    Assignees: Nutech Company Limited, Tsinghua University
    Inventors: Yuxiang Xing, Li Zhang, Jianmin Li, Zhiqiang Chen, Jianping Gu
  • Patent number: 10724969
    Abstract: An X-ray detection method and an X-ray detector are provided. The X-ray detection method according to embodiments of the present disclosure includes: dividing an energy range of photons emitted by an X-ray source into a number N of energy windows, where N is an integer greater than 0; obtaining a weighting factor for each of the number N of energy windows based on linear attenuation coefficients of a substance of interest and a background substance of an imaging target; obtaining a weighting factor matrix for M output channels of an X-ray detector based on the weighting factor for each of the number N of energy windows, where M is an integer greater than 0; and obtaining output results of the M output channels based on the weighting factor matrix and numbers of photons having an energy range falling into individual energy windows of the number N of energy windows.
    Type: Grant
    Filed: October 30, 2018
    Date of Patent: July 28, 2020
    Assignees: NUCTECH COMPANY LIMITED, TSINGHUA UNIVERSITY
    Inventors: Yuxiang Xing, Xiaoyue Guo, Zhi Deng, Le Shen, Li Zhang, Zhiqiang Chen, Liang Li
  • Publication number: 20200210785
    Abstract: Empty container identification method and system are disclosed. The method includes: obtaining customs declaration information, and finding out an vehicle declared as an empty container or an empty vehicle from the customs declaration information; performing X-ray inspection on the vehicle to acquire a transmission image of the vehicle; inputting the transmission image into an empty container identification model obtained by pre-training, so that the empty container identification model determines candidate regions of the transmission image, and performs post-processing analysis on the candidate regions to obtain an image identification result; and comparing the image identification result with the corresponding customs declaration information to determine whether or not the image identification result is consistent with the customs declaration information.
    Type: Application
    Filed: December 23, 2019
    Publication date: July 2, 2020
    Inventors: Yanjie YAO, Yongchun LIU, Yan ZHANG, Ziran ZHAO, Li ZHANG, Yuxiang XING
  • Patent number: 10649104
    Abstract: A method and apparatus for reconstructing an incident energy spectrum for a detector are disclosed. In this method, an object to be inspected is illuminated with rays, and then rays transmitted through the object to be inspected are received by the detector to convert the received rays into data of a detected energy spectrum. The incident energy spectrum for the detector is reconstructed based on the data of the energy spectrum using a statistical iterative algorithm with a pre-established detector response function. With the above solution of the embodiments, the incident energy spectrum for the detector can be more accurately acquired, thereby reducing a distortion of the incident energy spectrum caused by the detector.
    Type: Grant
    Filed: May 16, 2017
    Date of Patent: May 12, 2020
    Assignees: Tsinghua University, Nuctech Company Limited
    Inventors: Liang Li, Zhiqiang Chen, Li Zhang, Ziran Zhao, Yuxiang Xing, Kejun Kang, Lan Zhang, Ruizhe Li
  • Patent number: 10634810
    Abstract: The disclosure provides a scanning imaging system for security inspection of an object and an imaging method thereof, the system comprising: a conveying unit configured for bringing the object to move along a conveying direction; a plurality of radiographic sources at one side of the conveying unit, being arranged successively in a direction vertical to a plane, in which the conveying unit is located, and configured for alternately emitting ray beams to form a scanning area; a linear detector array at the other side of the conveying unit, being configured for detecting first projection images, which are formed after the ray beams emitted by the plurality of radiographic sources penetrate through the object, in the process of the object passing through the scanning area; an imaging unit configured for obtaining a first reconstructed image of the object based on the first projection images of the plurality of radiographic sources.
    Type: Grant
    Filed: July 17, 2018
    Date of Patent: April 28, 2020
    Assignees: Nuctech Company Limited, Tsinghua University
    Inventors: Li Zhang, Zhiqiang Chen, Le Shen, Qingping Huang, Yunda Sun, Xin Jin, Hui Ding, Yuxiang Xing
  • Publication number: 20200126271
    Abstract: An exemplary system, method, and computer-accessible medium for generating computed tomography (“CT”) image(s) of a subject(s) can be provided which can include receiving low dose CT imaging information for the subject(s), where the low dose CT imaging information can be based on a radiation dose of less than about 50 mAs, receiving a priori CT image data, and generating the CT image(s) based on the low dose CT imaging information and the a priori CT image data. A further CT images(s) can be generated based on the CT image(s) and the a priori CT image data. The a priori CT image data can include a set of Markov Random Field (MRF) coefficients derived from high dose or full dose CT image data.
    Type: Application
    Filed: June 12, 2018
    Publication date: April 23, 2020
    Inventors: JEROME ZHENGRONG LIANG, YONGFEND GAO, YUXIANG XING, HONGBING LU
  • Patent number: 10489939
    Abstract: A spectral CT image reconstructing method includes: collecting incomplete original projection data in each of a plurality of energy windows; performing a projection data cross estimation using corresponding original projection data in at least one pair of energy windows constituted by different energy windows of the plurality of energy windows to obtain estimated projection data, wherein each pair of energy windows comprises a first energy window and a second energy window; combining the original projection data and the corresponding estimated projection data to obtain complete projection data; and reconstructing a spectral CT image using the complete projection data.
    Type: Grant
    Filed: August 22, 2016
    Date of Patent: November 26, 2019
    Assignees: TSINGHUA UNIVERSITY, NUCTECH COMPANY LIMITED
    Inventors: Yuxiang Xing, Li Zhang, Huayu Zhang, Le Shen
  • Patent number: 10448904
    Abstract: The present disclosure provides a decomposition method based on basis material combination. In the present disclosure, a scanned object is divided into a plurality of regions, the basis material combinations used in each of the divided regions are different each other, and the scanned object is re-divided according to the re-determined equivalent atomic number of its each point until the change on decomposition coefficient meets certain conditions. Thereby, a decomposition method based on dynamic basis material combinations is realized, which reduces a decomposition error caused by improper selection of the basis material combination and improves the accuracy of the decomposition and substance identification of the multi-energy CT.
    Type: Grant
    Filed: December 26, 2018
    Date of Patent: October 22, 2019
    Assignees: TSINGHUA UNIVERSITY, NUCTECH COMPANY LIMITED
    Inventors: Liang Li, Zhiqiang Chen, Kejun Kang, Ziran Zhao, Li Zhang, Yuxiang Xing, Tiao Zhao, Jianmin Li, Bicheng Liu, Qian Yi
  • Publication number: 20190295250
    Abstract: The present disclosure discloses a method, an apparatus and a system for reconstructing an image of a three-dimensional surface.
    Type: Application
    Filed: May 3, 2017
    Publication date: September 26, 2019
    Inventors: Li Zhang, Sen Wang, Zhiqiang Chen, Yuxiang Xing, Xin Jin
  • Publication number: 20190206095
    Abstract: An image processing method, comprising: acquiring, by a CT scanning system, projection data of an object; and processing, by using a convolutional neural network, the projection data, to acquire an estimated image of the object. The convolutional neural network comprises: a projection domain network for processing input projection data to obtain estimated projection data; an analytical reconstruction network layer for performing analytical reconstruction to obtain a reconstructed image; an image domain network for processing the reconstructed image to obtain an estimated image, a projection layer for performing a projection operation by using a system projection matrix of the CT scanning system, to obtain a projection result of the estimated image; and a statistical model layer for determining consistency among the input projection data, the estimated projection data, and the projection result of the estimated image based on a statistical model.
    Type: Application
    Filed: December 28, 2018
    Publication date: July 4, 2019
    Inventors: Yuxiang XING, Kaichao LIANG, Le SHEN, Li ZHANG, Hongkai YANG, Kejun KANG, Zhiqiang CHEN, Jianmin LI, Yinong LIU
  • Patent number: 10339673
    Abstract: Disclosed is a dual-energy ray imaging method and system. The method comprises: calculating the mass thicknesses of the materials in the overlapped area of two materials by using a calibrated surface fitting method, and then decomposing a pair of original high-energy and low-energy data for this pixel into two high-low-energy data sets corresponding to the two materials, and finally calculating and acquiring the composition result of different materials for each pixel. The disclosure is especially advantageous in that the problem of error recognition of materials due to the two overlapped materials can be eliminated and the stratified imaging of multiple materials can be achieved, thereby improving the accuracy of the substance recognition and reducing the rate of false positive and false negative which is very important to the applications in the field of security check and anti-smuggling.
    Type: Grant
    Filed: December 23, 2015
    Date of Patent: July 2, 2019
    Assignees: Tsinghua University, Nuctech Company Limited
    Inventors: Liang Li, Zhiqiang Chen, Kejun Kang, Li Zhang, Ziran Zhao, Yuxiang Xing, Yongshun Xiao, Jianping Gu, Juan Zheng
  • Publication number: 20190192090
    Abstract: The present disclosure provides a decomposition method based on basis material combination. In the present disclosure, a scanned object is divided into a plurality of regions, the basis material combinations used in each of the divided regions are different each other, and the scanned object is re-divided according to the re-determined equivalent atomic number of its each point until the change on decomposition coefficient meets certain conditions. Thereby, a decomposition method based on dynamic basis material combinations is realized, which reduces a decomposition error caused by improper selection of the basis material combination and improves the accuracy of the decomposition and substance identification of the multi-energy CT.
    Type: Application
    Filed: December 26, 2018
    Publication date: June 27, 2019
    Inventors: Liang Li, Zhiqiang Chen, Kejun Kang, Ziran Zhao, Li Zhang, Yuxiang Xing, Tiao Zhao, Jianmin Li, Bicheng Liu, Qian Yi
  • Patent number: 10302578
    Abstract: Methods and system for decomposing a high-energy dual-energy X-ray CT material are disclosed. In the method, two types of effect such as Compton effect and electron pairing effect which dominates are reserved and the influence of the other effect such a photoelectric effect is removed so as to improve the accuracy of the material decomposition. The unique advantage of the present disclosure is to effectively remove the error of the calculated atomic number Z due to directly selecting two effects during processes of material decomposition in the conventional dual-energy CT method. This may greatly improve the accuracy of dual-energy CT identification of the material, and it is important to improve the conventional dual-use CT imaging system applications, such as clinical therapy, security inspection, industrial non-destructive testing, customs anti-smuggling and other fields.
    Type: Grant
    Filed: April 24, 2017
    Date of Patent: May 28, 2019
    Assignees: Tsinghua University, Nuctech Company Limited
    Inventors: Liang Li, Zhiqiang Chen, Kejun Kang, Li Zhang, Ziran Zhao, Yuxiang Xing, Jianmin Li, Yulan Li, Tiao Zhao
  • Publication number: 20190094407
    Abstract: The disclosure provides a scanning imaging system for security inspection of an object and an imaging method thereof, the system comprising: a conveying unit configured for bringing the object to move along a conveying direction; a plurality of radiographic sources at one side of the conveying unit, being arranged successively in a direction vertical to a plane, in which the conveying unit is located, and configured for alternately emitting ray beams to form a scanning area; a linear detector array at the other side of the conveying unit, being configured for detecting first projection images, which are formed after the ray beams emitted by the plurality of radiographic sources penetrate through the object, in the process of the object passing through the scanning area; an imaging unit configured for obtaining a first reconstructed image of the object based on the first projection images of the plurality of radiographic sources.
    Type: Application
    Filed: July 17, 2018
    Publication date: March 28, 2019
    Applicants: Nuctech Company Limited, Tsinghua University
    Inventors: Li ZHANG, Zhiqiang CHEN, Le SHEN, Qingping HUANG, Yunda SUN, Xin JIN, Hui DING, Yuxiang XING
  • Publication number: 20190086562
    Abstract: An X-ray detection method and an X-ray detector are provided. The X-ray detection method according to embodiments of the present disclosure includes: dividing an energy range of photons emitted by an X-ray source into a number N of energy windows, where N is an integer greater than 0; obtaining a weighting factor for each of the number N of energy windows based on linear attenuation coefficients of a substance of interest and a background substance of an imaging target; obtaining a weighting factor matrix for M output channels of an X-ray detector based on the weighting factor for each of the number N of energy windows, where M is an integer greater than 0; and obtaining output results of the M output channels based on the weighting factor matrix and numbers of photons having an energy range falling into individual energy windows of the number N of energy windows.
    Type: Application
    Filed: October 30, 2018
    Publication date: March 21, 2019
    Applicants: Tsinghua University, Nuctech Company Limited
    Inventors: Yuxiang XING, Xiaoyue GUO, Zhi DENG, Le SHEN, Li ZHANG, Zhiqiang CHEN, Liang LI
  • Publication number: 20190056338
    Abstract: The present disclosure discloses a ray transmission and fluorescence CT imaging system and method. The system comprises: a ray source configured to emit a beam of rays; a rotational scanning device configured to perform rotational CT scanning on an object to be inspected; a transmission CT detector configured to receive the beam of rays which has passed through the object; a fluorescence CT detector configured to receive fluorescent photons excited by irradiation of the beam of rays on the object; a data acquisition unit configured to acquire a transmission data signal and a fluorescence data signal respectively; and a control and data processing unit configured to control the ray source to emit the beam of rays, control the rotational scanning device to perform the rotational CT scanning, and obtain a transmission CT image and a fluorescence CT image simultaneously based on the transmission data signal and the fluorescence data signal.
    Type: Application
    Filed: July 25, 2018
    Publication date: February 21, 2019
    Inventors: Liang LI, Zhiqiang CHEN, Li ZHANG, Ziran ZHAO, Yuxiang XING, Siyuan ZHANG
  • Publication number: 20190035117
    Abstract: A method and device for reconstructing a CT image and a storage medium are disclosed. CT scanning is performed on an object to be inspected to obtain projection data on a first scale. Projection data on a plurality of other scales is generated from the projection data on the first scale. Projection data on each scale is processed on the corresponding scale by using a first convolutional neural network to obtain processed projection data, and a back-projection operation is performed on the processed projection data to obtain a CT image on the corresponding scale. CT images on the plurality of scales are fused to obtain a reconstructed image of the object to be inspected.
    Type: Application
    Filed: July 25, 2018
    Publication date: January 31, 2019
    Inventors: Yuxiang XING, Li ZHANG, Jianmin LI, Zhiqiang CHEN, Jianping GU
  • Publication number: 20190035116
    Abstract: A method and device for reconstructing a CT image and a storage medium are disclosed. CT scanning is performed on an object to be inspected to obtain projection data. The projection data is processed using a first convolutional neural network to obtain processed projection data. The first convolutional neural network comprises a plurality of convolutional layers. A back-projection operation is performed on the processed projection data to obtain a reconstructed image.
    Type: Application
    Filed: July 25, 2018
    Publication date: January 31, 2019
    Inventors: Yuxiang XING, Li ZHANG, Jianmin LI, Zhiqiang CHEN, Jianping GU
  • Publication number: 20180328866
    Abstract: The present disclosure provides a low-angle self-swinging type computed tomography (CT) apparatus, which is provided with an X-ray accelerator and a plurality of rows of detectors and is configured to include a slip ring, such that the slip ring with the accelerator and the detectors thereon is capable of performing a single-pendulum reciprocating movement while an objected to be inspected passes through the slip ring, a three dimension CT image of the object is displayed, thereby achieving accurate inspection for large-scale objects, such as van containers.
    Type: Application
    Filed: July 9, 2018
    Publication date: November 15, 2018
    Inventors: Kejun KANG, Zhiqiang CHEN, Yuanjing LI, Li ZHANG, Ziran ZHAO, Yaohong LIU, Jianping GU, Liang LI, Yuxiang XING