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公开(公告)号：US11340177B2
公开(公告)日：2022-05-24
申请号：US15733630
申请日：2020-01-20
Applicant: Nuctech Company Limited , Tsinghua University
Inventor： Zhiqiang Chen , Li Zhang , Zhenhua Zhao , Yunda Sun , Xin Jin , Wuyang Liang
Abstract: Disclosed are calibration assembly and calibration method of calibrating geometric parameters of a CT apparatus. The calibration assembly includes at least one calibration unit each including a plurality of calibration wires, and the plurality of calibration wires are arranged regularly in a same plane. The calibration assembly is easy to be processed and can be used to calibrate geometric parameters of a CT apparatus, and the calibration operations are simple and easy to be implemented.
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公开(公告)号：US10810437B2
公开(公告)日：2020-10-20
申请号：US15822920
申请日：2017-11-27
Applicant: Nuctech Company Limited
Inventor： Zhiqiang Chen , Li Zhang , Gang Peng , Zhisheng Dai , Yunda Sun , Dong Li
Abstract: The present disclosure relates to a security check system and method. The present disclosure provides a security check system for identifying objects of interest from multiple objects, comprising: an object-of-interest determining device for determining whether an object is an object of interest; an image mark applying device for acquiring images related to selected objects among the multiple objects and recording image marks of the selected objects; and a mark detecting device for detecting the image marks, wherein the security check system is configured to identify whether the object is the object of interest based on the detection of the mark detecting device and outputs a warning accordingly.
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公开(公告)号：US10338011B2
公开(公告)日：2019-07-02
申请号：US15263207
申请日：2016-09-12
Applicant: TSINGHUA UNIVERSITY , NUCTECH COMPANY LIMITED
Inventor： Zhiqiang Chen , Li Zhang , Tianyi Yang Dai , Qingping Huang , Yunda Sun , Xin Jin
IPC: G01N23/046 , G01N23/083 , G01N23/207 , G21K1/02 , G01N23/20 , G01V5/00
Abstract: The present disclosure relates to multi-modality detection systems and methods. One illustrative multi-modality detection system may include a distributed radiation source configured to irradiate an object under detection, a primary collimator configured to separate rays of the distributed radiation source into two parts, wherein one part is for CT detection and the other part is for XRD detection, a CT detection device configured to perform a CT detection to acquire a CT image of the object under detection, and an XRD detection device configured to perform an XRD detection to acquire an XRD image of the object under detection, wherein the CT detection and the XRD detection are performed simultaneously.
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公开(公告)号：US09978184B2
公开(公告)日：2018-05-22
申请号：US14540440
申请日：2014-11-13
Applicant: Tsinghua University , Nuctech Company Limited
Inventor： Zhiqiang Chen , Yuanjing Li , Ziran Zhao , Shuo Wang , Jianping Gu , Yunda Sun
CPC classification number: G06T19/20 , G06T7/0012 , G06T15/06 , G06T15/08 , G06T15/10 , G06T17/005 , G06T2207/10136 , G06T2210/12 , G06T2219/2021
Abstract: The present disclosure provides method and apparatus for marking a target in a 3D image. The method include steps of: acquiring Computed Tomography (CT) image data of a scene; rendering a 3D image of the scene using ray casting based on the CT image data; removing a transparent region from the 3D image based on a fixed 2D transfer function; and marking the target in the 3D image.
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公开(公告)号：US10436932B2
公开(公告)日：2019-10-08
申请号：US15279207
申请日：2016-09-28
Applicant: NUCTECH COMPANY LIMITED , CINTS CO. LTD.
Inventor： Qitian Miao , Zhiqiang Chen , Li Zhang , Yunda Sun , Ming Huang , Qingping Huang , Ming Hu , Lei Lei , Jie Xia
IPC: G01N23/046 , G01V5/00
Abstract: The present disclosure discloses an inspection system for quarantine and a method thereof. The CT technology is applied to the field of quarantine supervision, overcoming a problem of objects in an image of a single-view or a multi-view X-ray machine being overlapped, as well as a problem of organics including contrabands in a conventional CT image being not highlighted, not elaborated, and having bad contrast. Accuracy and efficiency of inspecting an object by human operator for quarantine inspection can be considerably improved, which is of a high application value.
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Patent Agency Ranking
公开(公告)号：US09784883B2
公开(公告)日：2017-10-10
申请号：US14577069
申请日：2014-12-19
Applicant: Tsinghua University , Nuctech Company Limited
Inventor： Zhiqiang Chen , Li Zhang , Qingping Huang , Yunda Sun , Xin Jin , Tao Yang , Le Shen , Ji Zhao
CPC classification number: G01V5/0041 , G01N23/046 , G01T1/2985 , G01V5/005
Abstract: Multi-spectral static CT apparatuses are disclosed. The apparatus includes a ray source in a form of multiple distributed spots, multiple columns of detectors, a data acquisition device, an article carrying and control device, and a multi-spectral projection data processing device. An object of the present disclosure is to combine static CT scanning technology with multi-spectral analysis technology. It has an advantage of a static CT system, such as high scanning speed, simple mechanic structure, and/or cost reduction due to omission of slip ring. It also can perform identification of material in an article, and can be widely applied in occasions such as safety inspection, and smuggling suppression at customs.
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公开(公告)号：US09746579B2
公开(公告)日：2017-08-29
申请号：US14576737
申请日：2014-12-19
Applicant: Tsinghua University , Nuctech Company Limited
Inventor： Li Zhang , Zhiqiang Chen , Qingping Huang , Xin Jin , Yunda Sun , Le Shen , Ji Zhao
CPC classification number: G01V5/005 , G01N23/046 , G01T7/08 , G06T11/003 , G06T2207/10072 , G06T2211/40
Abstract: A CT system and method thereof are disclosed. The system includes: a conveyor mechanism; a first scanning stage configured to scan the object and generate a first digital signal; a second scanning stage spaced from the first scanning stage at a preset distance in a direction of the object's movement; a processing device configured to reconstruct a CT image of the object at a first image quality based on the first digital signal, and analyze the CT image; and a control device configured to adjust a scanning parameter of the second scanning stage based on an analysis result of the processing device to cause the second scanning stage to output a second digital signal. The processing device reconstructs a CT image of the object at a second image quality higher than the first image quality at least based on the second digital signal. The system takes full advantage of the distributed ray sources which replace the normal slip ring technology.
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公开(公告)号：US20170184756A1
公开(公告)日：2017-06-29
申请号：US15279207
申请日：2016-09-28
Applicant: NUCTECH COMPANY LIMITED , CINTS CO. LTD.
Inventor： Qitian Miao , Zhiqiang Chen , Li Zhang , Yunda Sun , Ming Huang , Qingping Huang , Ming Hu , Lei Lei , Jie Xia
IPC: G01V5/00
CPC classification number: G01V5/005 , G01N23/046 , G01V5/0041
Abstract: The present disclosure discloses an inspection system for quarantine and a method thereof. The CT technology is applied to the field of quarantine supervision, overcoming a problem of objects in an image of a single-view or a multi-view X-ray machine being overlapped, as well as a problem of organics including contrabands in a conventional CT image being not highlighted, not elaborated, and having bad contrast. Accuracy and efficiency of inspecting an object by human operator for quarantine inspection can be considerably improved, which is of a high application value.
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9.发明申请公开(公告)号：US20140185923A1
公开(公告)日：2014-07-03
申请号：US14136462
申请日：2013-12-20
Applicant: NUCTECH COMPANY LIMITED , TSINGHUA UNIVERSITY
Inventor： Zhiqiang Chen , Li Zhang , Ziran Zhao , Qingping Huang , Qiang Li , Jianping Gu , Yunda Sun
IPC: G06K9/00
CPC classification number: G06T7/596 , G06K9/00201 , G06K9/00523 , G06K9/00536 , G06K9/6215 , G06K9/627 , G06K2209/09 , G06T7/0004 , G06T7/68 , G06T11/008 , G06T2207/10081 , G06T2207/30112 , G06T2211/408
Abstract: Methods for extracting a shape feature of an object and security inspection methods and apparatuses. Use is made of CT's capability of obtaining a 3D structure. The shape of an object in an inspected luggage is used as a feature of a suspicious object in combination with a material property of the object. For example, a false alarm rate in detection of suspicious explosives may be reduced.
Abstract translation: 用于提取对象的形状特征的方法和安全检查方法和装置。 使用CT可以获得3D结构。 检查行李中的物体的形状被用作可疑物体的特征，与物体的材料属性相结合。 例如，可能会减少检测可疑炸药的误报率。
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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.
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