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    X-ray detection system and method
    1.
    发明授权
    X-ray detection system and method 有权

    公开(公告)号：US10942290B2

    公开(公告)日：2021-03-09

    申请号：US16626169

    申请日：2019-05-16

    Applicant: Nuctech Company Limited

    Inventor： Li Zhang ,  Zhiqiang Chen ,  Yunda Sun ,  Xin Jin ,  Ming Chang ,  Xiaofei Xu

    IPC: G01N23/20091 ,  G01V5/00

    Abstract: The present application discloses an X-ray detection system and method. The detection system includes: a beam source generator, first detectors, a second detector, a collimating device and a processor. The first detectors and the second detector are alternately arranged in a transmission direction of an object to be detected. The beam source generator emits a plurality of columns of beam signals, wherein each column of beam signals comprises a plurality of beam signals; the first detectors receive a plurality of columns of transmitted beam signals passing through the object; the collimating device performs a specificity selection from a plurality of columns of scattered beam signals passing through the object; the second detector receives scattered beam signals selected by the collimating device; and the processor determines a detection result of the object according to the plurality of columns of transmitted beam signals and the selected scattered beam signals.

    Radiography systems based on distributed ray source
    2.
    发明授权
    Radiography systems based on distributed ray source 有权

    公开(公告)号：US10371648B2

    公开(公告)日：2019-08-06

    申请号：US15301345

    申请日：2015-12-14

    Applicant: NUCTECH COMPANY LIMITED

    Inventor： Li Zhang ,  Xin Jin ,  Huaping Tang ,  Qingping Huang ,  Yunda Sun ,  Zhiqiang Chen

    IPC: G01N23/00 ,  G01N23/04 ,  G01N23/046 ,  G01V5/00

    Abstract: The present disclosure discloses a radiography system including: a ray source, comprising a plurality of X-ray generators which are distributed on one or more planes intersected with a moving direction of an object being inspected; a detector module comprising a plurality of detection units; a data collection circuit; a controller, configured to control at least two X-ray generators of the plurality of X-ray generators in the ray source to generate X-rays alternately such that the object is scanned by the generated X-rays; and control the detector module and the data collection circuit to respectively obtain detection data corresponding to the at least two X-ray generators; and a data processing computer, configured to create images of the object being inspected in view angles of the at least two X-ray generators based on the detection data. The above embodiments may implement a multi-view-angle perspective imaging system within a single scan plane by utilizing a distributed X-ray source and reuse of the detectors.

    X-RAY IMAGING SYSTEM AND METHOD
    3.
    发明申请
    X-RAY IMAGING SYSTEM AND METHOD 审中-公开

    公开(公告)号：US20180217071A1

    公开(公告)日：2018-08-02

    申请号：US15505199

    申请日：2015-12-23

    Applicant: Tsinghua University ,  Nuctech Company Limited

    Inventor： Zhiqiang Chen ,  Li Zhang ,  Le Shen ,  Qingping Huang ,  Xin Jin

    IPC: G01N23/046

    CPC classification number: G01N23/046 ,  G01N23/041 ,  G01N2223/1016 ,  G01N2223/419

    Abstract: An X-ray imaging system and method are provided. The system may include: an X-ray source configured to irradiate X-ray beams; a first grating and a second grating arranged sequentially in an irradiation direction of the X-ray beams; a detector arranged at downstream of the second grating in the irradiation direction; and a controller and data processing device configured to control the X-ray source to irradiate the X-ray beams, to control the detector to receive X-ray beams passing through the first grating and the second grating to generate phase contrast information and/or dark field information, and to perform CT check on an object under check based on the phase contrast information and/or the dark field information to obtain a CT image. In this way, it is possible to obtain more characteristic information about the object under check, so as to achieve more precise material recognition and security check.

    Spiral CT Systems and Reconstruction Methods
    6.
    发明申请
    Spiral CT Systems and Reconstruction Methods 有权
    螺旋CT系统和重建方法

    公开(公告)号：US20150332486A1

    公开(公告)日：2015-11-19

    申请号：US14708866

    申请日：2015-05-11

    Applicant: Nuctech Company Limited ,  Tsinghua University

    Inventor： Li Zhang ,  Zhiqiang Chen ,  Le Shen ,  Yuxiang Xing ,  Xin Jin ,  Qingping Huang

    IPC: G06T11/00 ,  G06T7/00 ,  A61B6/00 ,  A61B6/03 ,  A61B6/02

    CPC classification number: G06T11/006 ,  A61B6/027 ,  A61B6/032 ,  A61B6/4085 ,  A61B6/4266 ,  A61B6/5205 ,  G06T7/0012 ,  G06T2207/10081 ,  G06T2207/30004 ,  G06T2211/421

    Abstract: The present disclosure discloses a spiral CT system and a reconstruction method thereof. In some embodiments, it is proposed that data missing due to a large pitch is compensated by weighting the complementary projection data of the projection data obtained using the spiral CT system. After the data is complemented, the projection data is rebinned as cone parallel beam data, cone-angle cosine weighting and one-dimensional filtering are implemented on the rebinned data, and parallel beam back projection is finally implemented on the filtered data, to obtain the reconstructed images. In some embodiments, with the above method, the speed of the belt can be increased by more than one time in a case that the existing area of the detectors and the existing speed of the slip ring are unchanged, thereby improving the pass rate of the luggage and maintaining the quality of the reconstructed images unchanged.

    Abstract translation: 本公开公开了一种螺旋CT系统及其重建方法。 在一些实施例中，提出通过对使用螺旋CT系统获得的投影数据的互补投影数据进行加权来补偿由于大音调而丢失的数据。 数据补充后，将投影数据重新设置为锥形平行光束数据，对重定位数据进行锥角余弦加权和一维滤波，最后在滤波数据上实现平行光束反投影，获得 重建图像。 在一些实施例中，利用上述方法，在检测器的现有区域和滑环的现有速度不变的情况下，带的速度可以增加多于一次，从而提高了传感器的通过率 行李保持重建图像的质量不变。

    Trailed multiple-viewing-angle item inspection system and method of using the same
    7.
    发明授权
    Trailed multiple-viewing-angle item inspection system and method of using the same 有权

    公开(公告)号：US10648929B2

    公开(公告)日：2020-05-12

    申请号：US15300751

    申请日：2015-12-14

    Applicant: NUCTECH COMPANY LIMITED

    Inventor： Huaping Tang ,  Zhiqiang Chen ,  Yuanjing Li ,  Xin Jin ,  Zhuoyan Liu ,  Yonggang Wang ,  Hua Peng ,  Zhanfeng Qin

    IPC: G01N23/04 ,  G01V5/00

    Abstract: Embodiments of the present invention provide a trailed multiple-viewing-angle item inspection system and method of operating the same. The inspection system includes: a trailer vehicle, a radiation inspection device, a power supply device and a power grid connection device. The trailer vehicle is mounted with a power supply chamber within which a power supply device and a power grid connection device are mounted and an inspection chamber within which a radiation inspection device is mounted. The radiation inspection device includes: ray radiation source configured to emit X-rays from various positions, detectors, a body frame, a transfer device, a data and image process system and a display and operation device. The trailed multiple-viewing-angle item inspection system of the present invention can obtain a transmission image containing depth information of an item by its one pass through the device, and achieve a high-speed inspection, a good image quality and a high inspection efficiency of hazardous articles, and its flexibility and movability can meet requirements in various working conditions.

    Detection system and method
    8.
    发明授权
    Detection system and method 有权

    公开(公告)号：US10295481B2

    公开(公告)日：2019-05-21

    申请号：US15262894

    申请日：2016-09-12

    Applicant: Tsinghua University ,  NUCTECH COMPANY LIMITED

    Inventor： Zhiqiang Chen ,  Li Zhang ,  Tianyi Yang Dai ,  Ji Zhao ,  Xin Jin ,  Ming Chang

    IPC: G01N23/20 ,  G01N23/00 ,  G01N23/046 ,  G01N23/083 ,  G01N23/207 ,  G21K1/02 ,  G01V5/00

    Abstract: The present disclosure relates to detection systems and methods. One illustrative detection system may include a distributed radiation source having a plurality of radiation source focus points, which irradiate an object under detection, wherein the plurality of radiation source focus points are divided into a certain number of groups, and a primary collimator that limits rays of each of the radiation source focus points such that the rays emit into an XRD detection device. An XRD detection device may include a plurality of XRD detectors that are divided into the same number of groups as the radiation source focus points, wherein XRD detectors in a same group are arranged to be separated by XRD detectors in other groups, and rays of each of the radiation source focus points are received by XRD detectors having the same group number as the group number of the radiation source focus point.

    X-ray phase-contrast imaging system and imaging method
    9.
    发明授权
    X-ray phase-contrast imaging system and imaging method 有权

    公开(公告)号：US10267752B2

    公开(公告)日：2019-04-23

    申请号：US15328437

    申请日：2015-11-02

    Applicant: Tsinghua University ,  Nuctech Company Limited

    Inventor： Li Zhang ,  Zhiqiang Chen ,  Xiaolei Jiang ,  Xiaohua Zhu ,  Xin Jin

    IPC: G01N23/04 ,  G01N23/046

    Abstract: The present disclosure relates to X-ray imaging systems and methods. An exemplary system may comprise a distributed X-ray source arrangement, a fixed grating module, an X-ray detecting device, and a computer workstation. In one illustrative implementation, X-ray sources of the distributed incoherent X-ray source arrangement may sequentially generate and emit X-rays to an object to be detected. Further, for each exposure, the X-ray detecting device may receive the X-rays, wherein after a series of stepping exposures and corresponding data acquisitions, at each pixel of the X-ray detecting device, X-ray intensities are represented as an intensity curve; the intensity curve may be compared to an intensity curve in the absence of the object to be detected, and a pixel value at each pixel may be obtained from a variation of the intensity curves; and image information of the object to be detected may be obtained according to such pixel values.

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