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    Method for positioning target in three-dimensional CT image and security check system
    21.
    发明授权
    Method for positioning target in three-dimensional CT image and security check system 有权

    公开(公告)号：US10145977B2

    公开(公告)日：2018-12-04

    申请号：US15300668

    申请日：2015-12-15

    Applicant: NUCTECH COMPANY LIMITED

    Inventor： Zhiqiang Chen ,  Li Zhang ,  Shuo Wang ,  Yunda Sun ,  Qingping Huang ,  Zhi Tang

    IPC: G01V5/00 ,  G01N23/046 ,  G06T11/00

    Abstract: A method for positioning a target in a three-dimensional CT image and a security check system. The method includes: displaying a three-dimensional CT image; receiving a selection by a user of at least one area of the three-dimensional CT image at a first viewing angle to generate a first three-dimensional description; receiving a selection by the user of at least one area of the three-dimensional CT image at a second viewing angle to generate a second three-dimensional description, wherein an angle between the first viewing angle and the second viewing angle is within a predetermined range and the first three-dimensional description and the second three-dimensional description are related to a size, a location, and/or a physical property of a target at corresponding viewing angles; and determining the target in the three-dimensional CT image based on the first three-dimensional description and the second three-dimensional description.

    X-RAY IMAGING SYSTEM AND METHOD
    22.
    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.

    Recognizing method of flaky or blocky prohibited articles, explosives or drugs
    25.
    发明授权
    Recognizing method of flaky or blocky prohibited articles, explosives or drugs 有权
    识别薄片或块状物品，爆炸物或药物的方法

    公开(公告)号：US09542624B2

    公开(公告)日：2017-01-10

    申请号：US15074270

    申请日：2016-03-18

    Applicant: Tsinghua University ,  Nuctech Company Limited

    Inventor： Li Zhang ,  Qingping Huang ,  Yunda Sun ,  Lei Lei ,  Zhi Tang

    IPC: G06K9/62 ,  G01V5/00 ,  G06T7/40 ,  G06K9/52 ,  G06T5/00 ,  G06T7/60 ,  G06K9/46

    CPC classification number: G06K9/6267 ,  G01V5/005 ,  G06K9/52 ,  G06K2009/4666 ,  G06T5/00 ,  G06T7/40 ,  G06T7/60 ,  G06T2207/10088 ,  G06T2207/20021 ,  G06T2207/20172 ,  G06T2207/30242

    Abstract: The present invention discloses recognizing methods of flaky or blocky prohibited articles, explosives or drugs. Specifically, the method for recognizing flaky prohibited articles, explosives or drugs comprises steps of: (1) reading in tomogram data of an object to be inspected for one tomogram; (2) pre-processing the tomogram data; (3) splitting the pre-processed tomogram data into a plurality of regions that have similar physical properties; (4) analyzing whether each of the split regions is a flaky region; (5) determining whether the flaky region recognized in the current tomogram can be merged with the flaky region detected from the previous tomogram, so as to form a flaky target; (6) determining whether each detected flaky target is complete or finished; (7) repeating steps (1)-(6) and processing each tomogram data layer by layer, until all of the tomogram data have been processed.

    Abstract translation: 本发明公开了识别片状或块状物品，爆炸物或药物的方法。 具体来说，用于识别片状禁止物品，爆炸物或药物的方法包括以下步骤：（1）读取对于一个断层图像进行检查的物体的断层图数据; （2）预处理断层图像数据; （3）将预处理的断层图像数据分割成具有类似物理性质的多个区域; （4）分析每个分割区域是否是片状区域; （5）确定在当前断层图像中识别的片状区域是否可以与从先前断层图像检测到的片状区域合并，以便形成片状目标; （6）确定每个检测到的片状目标是完整还是完成; （7）重复步骤（1） - （6）并逐层处理每个断层图像数据，直到所有断层图像数据都被处理。

    RECOGNIZING METHOD OF FLAKY OR BLOCKY PROHIBITED ARTICLES, EXPLOSIVES OR DRUGS
    26.
    发明申请
    RECOGNIZING METHOD OF FLAKY OR BLOCKY PROHIBITED ARTICLES, EXPLOSIVES OR DRUGS 有权
    FLAKY或封闭禁止物品的识别方法，爆炸物或药物

    公开(公告)号：US20160314378A1

    公开(公告)日：2016-10-27

    申请号：US15074270

    申请日：2016-03-18

    Applicant: Tsinghua University ,  Nuctech Company Limited

    Inventor： Li Zhang ,  Qingping Huang ,  Yunda Sun ,  Lei Lei ,  Zhi Tang

    IPC: G06K9/62 ,  G06T5/00 ,  G06T7/60 ,  G01V5/00 ,  G06K9/52

    CPC classification number: G06K9/6267 ,  G01V5/005 ,  G06K9/52 ,  G06K2009/4666 ,  G06T5/00 ,  G06T7/40 ,  G06T7/60 ,  G06T2207/10088 ,  G06T2207/20021 ,  G06T2207/20172 ,  G06T2207/30242

    Abstract: The present invention discloses recognizing methods of flaky or blocky prohibited articles, explosives or drugs. Specifically, the method for recognizing flaky prohibited articles, explosives or drugs comprises steps of: (1) reading in tomogram data of an object to be inspected for one tomogram; (2) pre-processing the tomogram data; (3) splitting the pre-processed tomogram data into a plurality of regions that have similar physical properties; (4) analyzing whether each of the split regions is a flaky region; (5) determining whether the flaky region recognized in the current tomogram can be merged with the flaky region detected from the previous tomogram, so as to form a flaky target; (6) determining whether each detected flaky target is complete or finished; (7) repeating steps (1)-(6) and processing each tomogram data layer by layer, until all of the tomogram data have been processed.

    Abstract translation: 本发明公开了识别片状或块状物品，爆炸物或药物的方法。 具体来说，用于识别片状禁止物品，爆炸物或药物的方法包括以下步骤：（1）读取对于一个断层图像进行检查的物体的断层图数据; （2）预处理断层图像数据; （3）将预处理的断层图像数据分割成具有类似物理性质的多个区域; （4）分析每个分割区域是否是片状区域; （5）确定在当前断层图像中识别的片状区域是否可以与从先前断层图像检测到的片状区域合并，以便形成片状目标; （6）确定每个检测到的片状目标是完整还是完成; （7）重复步骤（1） - （6）并逐层处理每个断层图像数据，直到所有断层图像数据都被处理。

    Vehicular radiation inspection system
    27.
    发明授权
    Vehicular radiation inspection system 有权
    车载辐射检查系统

    公开(公告)号：US09448188B2

    公开(公告)日：2016-09-20

    申请号：US14412516

    申请日：2013-07-02

    Applicant: Nuctech Company Limited ,  Tsinghua University

    Inventor： Jianmin Li ,  Yinong Liu ,  Yulan Li ,  Chunguang Zong ,  Hui Gong ,  Qingping Huang ,  Weifeng Yu

    IPC: G01N23/10 ,  G01N23/04 ,  G01V5/00

    CPC classification number: G01N23/10 ,  G01N23/04 ,  G01N2223/301 ,  G01N2223/308 ,  G01V5/0016 ,  G01V5/0066

    Abstract: The present invention discloses a vehicular radiation inspection system comprising a mobile vehicle body, a detection arm, a radiation source and a detector. The vehicular radiation inspection system further comprises a following mechanism separated from the detection arm. The following mechanism contains radiation protection material, and the following mechanism follows the detection arm to move in a non-contact manner during inspection of the inspected object, so as to prevent radiation leakage. In the present invention, it does not need to infuse radiation protection material having a high density, such as lead, into the detection arm. Therefore, it can effectively decrease the weight of the detection arm, and it does not need to provide a balance counterweight on the mobile vehicle body on which the detection arm is carried, thereby effectively solving the problem that the vehicular radiation inspection system has an excessively large mass. Meanwhile, in the present invention, the moving process of the following mechanism is accurately controlled, so as to prevent the following mechanism from hitting the detection arm.

    Abstract translation: 本发明公开了一种包括移动车身，检测臂，辐射源和检测器的车辆辐射检查系统。 车辆辐射检查系统还包括与检测臂分离的跟随机构。 以下机构包含辐射防护材料，并且在检查被检查物体的检查期间，跟随检测臂的机构以非接触的方式移动，以防止辐射泄漏。 在本发明中，不需要将诸如铅的高密度的辐射防护材料注入到检测臂中。 因此，能够有效地降低检测臂的重量，并且不需要在携带检测臂的移动体上提供平衡配重，从而有效地解决了车辆用辐射检查系统过度的问题 大量。 同时，在本发明中，精确地控制以下机构的移动过程，以防止以下机构撞击检测臂。

    Spiral CT Systems and Reconstruction Methods
    28.
    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。

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