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1. 发明授权

US10641715B2 X-ray imaging system and method 有权
公开(公告)号：US10641715B2
公开(公告)日：2020-05-05
申请号：US15505199
申请日：2015-12-23
申请人： Tsinghua University , Nuctech Company Limited
发明人： Zhiqiang Chen , Li Zhang , Le Shen , Qingping Huang , Xin Jin
IPC分类号： G01N23/00 , G01N23/046 , G01N23/041
CPC分类号： G01N23/046 , G01N23/041 , G01N2223/1016 , G01N2223/419
摘要： 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.

2. 发明授权

US10408966B2 Inspection devices, inspection methods and inspection systems 有权
公开(公告)号：US10408966B2
公开(公告)日：2019-09-10
申请号：US15122659
申请日：2015-03-03
申请人： Tsinghua University , Nuctech Company Limited
发明人： Zhiqiang Chen , Li Zhang , Tianyi Yangdai , Qingping Huang
IPC分类号： G01T1/00 , G01V5/00 , G01N23/10 , G01N23/083 , G01T1/36
摘要： The present disclosure discloses an inspection device, an inspection method and an inspection system. The device comprises a distributed ray source comprising multiple source points; a light source collimator configured to converge the rays generated by the distributed ray source to form an inverted fan-shaped ray beam; a scatter collimator configured to only allow rays scattered at one or more particular scattering angles which are generated by the rays from the light source collimator interacting with inspected objects to pass; at least one detector each comprising multiple detection units which have an energy resolution capability and are substantially arranged in a cylindrical surface to receive the scattered rays passing through the scatter collimator; and a processing apparatus configured to calculate energy spectrum information of the scattered rays from the inspected objects based on a signal output by the detectors.

3. 发明授权

US10338011B2 Multi-modality detection system and method 有权
公开(公告)号：US10338011B2
公开(公告)日：2019-07-02
申请号：US15263207
申请日：2016-09-12
申请人： TSINGHUA UNIVERSITY , NUCTECH COMPANY LIMITED
发明人： Zhiqiang Chen , Li Zhang , Tianyi Yang Dai , Qingping Huang , Yunda Sun , Xin Jin
IPC分类号： G01N23/046 , G01N23/083 , G01N23/207 , G21K1/02 , G01N23/20 , G01V5/00
摘要： 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.

4. 发明授权

US11925183B2 Static CT detection device 有权
公开(公告)号：US11925183B2
公开(公告)日：2024-03-12
申请号：US17661257
申请日：2022-04-28
申请人： Tsinghua University , Nuctech Company Limited
发明人： Zhiqiang Chen , Li Zhang , Qingping Huang , Yong Zhou , Hui Ding , Chao Ji
IPC分类号： G01N23/046 , A22B5/00 , G01N23/083 , G01N23/18 , G01N33/12
CPC分类号： A22B5/007 , G01N23/046 , G01N23/083 , G01N23/18 , G01N33/12 , G01N2223/1016 , G01N2223/204 , G01N2223/30 , G01N2223/3307 , G01N2223/3308 , G01N2223/419 , G01N2223/5015 , G01N2223/618 , G01N2223/643
摘要： The present disclosure relates to a static CT detection device, including: a shielding body, formed with a detection channel through which an object under detection can pass; a ray source, emitting rays for detecting the object under detection when the object under detection passes through the detection channel; and a detector, for acquiring the rays emitted by the ray source and having passed through the detection channel, wherein the shielding body is formed with an opening portion, and the opening portion extends from an inlet of the detection channel to an outlet of the detection channel.

5. 发明授权

US09784883B2 Multi-spectral static CT apparatuses 有权
公开(公告)号：US09784883B2
公开(公告)日：2017-10-10
申请号：US14577069
申请日：2014-12-19
申请人： Tsinghua University , Nuctech Company Limited
发明人： Zhiqiang Chen , Li Zhang , Qingping Huang , Yunda Sun , Xin Jin , Tao Yang , Le Shen , Ji Zhao
IPC分类号： G01N23/00 , G01V5/00 , G01T1/29 , G01N23/04
CPC分类号： G01V5/0041 , G01N23/046 , G01T1/2985 , G01V5/005
摘要： 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.

6. 发明授权

US09746579B2 CT systems and methods thereof 有权
公开(公告)号：US09746579B2
公开(公告)日：2017-08-29
申请号：US14576737
申请日：2014-12-19
申请人： Tsinghua University , Nuctech Company Limited
发明人： Li Zhang , Zhiqiang Chen , Qingping Huang , Xin Jin , Yunda Sun , Le Shen , Ji Zhao
IPC分类号： A61B6/00 , G01V5/00 , G01N23/04 , G01T7/08 , G06T11/00
CPC分类号： G01V5/005 , G01N23/046 , G01T7/08 , G06T11/003 , G06T2207/10072 , G06T2211/40
摘要： 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.

7. 发明授权

US09557436B2 3-dimensional model creation methods and apparatuses 有权
标题翻译：三维模型创建方法和装置
公开(公告)号：US09557436B2
公开(公告)日：2017-01-31
申请号：US14138447
申请日：2013-12-23
申请人： Tsinghua University , Nuctech Company Limited
发明人： Zhiqiang Chen , Li Zhang , Ziran Zhao , Qiang Li , Jianping Gu , Qingping Huang
IPC分类号： G06T17/00 , G01V5/00 , G06T7/00 , G06K9/00
CPC分类号： G01V5/005 , G06K9/00214 , G06K2209/09 , G06T7/11 , G06T7/187 , G06T17/00 , G06T2207/10081 , G06T2207/30112
摘要： Disclosed are methods and apparatuses for creating a 3-Dimensional model for objects in an inspected luggage in a CT system. The method includes acquiring slice data of the luggage with the CT system; interpolating the slice data to generate 3D volume data of the luggage; performing unsupervised segmentation on the 3D volume data of the luggage to obtain a plurality of segmental regions; performing isosurface extraction on the plurality of segmental regions to obtain corresponding isosurfaces; and performing 3D surface segmentation on the isosurfaces to form a 3D model for the objects in the luggage. The above solutions can create a 3D model for objects in the inspected luggage in a relatively accurate manner, and thus provide better basis for subsequent shape feature extraction and security inspection, and reduce omission factor.
摘要翻译：公开了用于在CT系统中检查的行李中的物体创建三维模型的方法和装置。该方法包括采用CT系统获取行李的切片数据; 内插切片数据以生成行李的3D体积数据; 对行李的3D体积数据执行无监督分割以获得多个分段区域; 在多个分段区域进行等值面提取以获得相应的等值面; 并在等面上执行3D表面分割，以形成行李中物体的3D模型。上述解决方案可以以相对准确的方式为被检查行李中的对象创建3D模型，从而为随后的形状特征提取和安全检查提供更好的依据，并减少遗漏因素。

8. 发明授权

US09250180B2 Raman spectrum measuring method for drug inspection 有权
标题翻译：用于药物检查的拉曼光谱测量方法
公开(公告)号：US09250180B2
公开(公告)日：2016-02-02
申请号：US14495233
申请日：2014-09-24
申请人： Nuctech Company Limited , Tsinghua University
发明人： Zhiqiang Chen , Li Zhang , Jianhong Zhang , Hongqiu Wang , Ziran Zhao , Yumin Yi , Jianping Gu , Qingping Huang
IPC分类号： G01J3/44 , G01N21/47 , G01N33/15 , G01N21/65
CPC分类号： G01N21/47 , G01J3/44 , G01N21/65 , G01N21/658 , G01N33/15
摘要： A raman spectrum measuring method for drug inspection is provided, comprising: measuring raman spectrum of a sample to be inspected to acquire an original raman spectrum curve of the sample; determining whether the original raman spectrum curve has a characterizing portion, and if not, measuring a mixture of the sample and an enhancing agent to acquire an enhanced raman spectrum curve of the sample; and if the original raman spectrum curve of the sample to be inspected has a characterizing portion, comparing the original raman spectrum curve of the sample with data in an original raman spectrum database of a drug to determine whether the sample contains the drug, otherwise, comparing the enhanced raman spectrum curve of the sample with data in an enhanced raman spectrum database of the drug to determine whether the sample to be inspected contains the drug.
摘要翻译：提供了用于药物检查的拉曼光谱测量方法，包括：测量被检样品的拉曼光谱以获得样品的原始拉曼光谱曲线; 确定原始拉曼光谱曲线是否具有特征部分，如果不是，则测量样品和增强剂的混合物以获得样品的增强的拉曼光谱曲线; 如果要检查的样本的原始拉曼光谱曲线具有特征部分，则将样品的原始拉曼光谱曲线与药物的原始拉曼光谱数据库中的数据进行比较，以确定样品是否含有药物，否则比较增强的拉曼光谱曲线的样品与增强的拉曼光谱数据库中的数据，以确定待检样品是否含有药物。

9. 发明申请

US20150192531A1 VEHICULAR RADIATION INSPECTION SYSTEM 有权
标题翻译：车辆辐射检查系统
公开(公告)号：US20150192531A1
公开(公告)日：2015-07-09
申请号：US14412516
申请日：2013-07-02
申请人： Nuctech Company Limited , Tsinghua University
发明人： Jianmin Li , Yinong Liu , Yulan Li , Chunguang Zong , Hui Gong , Qingping Huang , Weifeng Yu
IPC分类号： G01N23/10 , G01V5/00
CPC分类号： G01N23/10 , G01N23/04 , G01N2223/301 , G01N2223/308 , G01V5/0016 , G01V5/0066
摘要： 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.
摘要翻译：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。

10. 发明授权

US08891081B1 Raman spectroscopy method of measuring melamine contents in dairy products having different matrixes 有权
标题翻译：测量具有不同基质的乳制品中三聚氰胺含量的拉曼光谱法
公开(公告)号：US08891081B1
公开(公告)日：2014-11-18
申请号：US14145454
申请日：2013-12-31
申请人： Nuctech Company Limited , Tsinghua University
发明人： Zhiqiang Chen , Li Zhang , Jianhong Zhang , Hongqui Wang , Ziran Zhao , Jianping Gu , Zhiming Wang , Qingping Huang , Yumin Yi
IPC分类号： G01J3/44 , G01N21/65
CPC分类号： G01N21/65
摘要： A raman spectroscopy method of measuring melamine contents in dairy products having different matrixes. The method includes: (a) establishing a database of characteristic curves of dairy products having different matrixes; (b) taking several copies of the dairy products having one certain unknown matrix and adding melamine standard solutions having different concentrations therein, to obtain a series of dairy product samples in which the relative concentrations of the melamine are known; (c) performing raman spectrum testing analysis and obtaining corresponding characteristic peak intensities to obtain a slope of the characteristic curve showing variation of the characteristic peak intensities with the relative concentrations of the melamine; (d) searching the database of step (a) using the slope of the characteristic curve of the dairy product samples to find a matching characteristic curve, and (e) calculating concentration of melamine in the dairy products by using the matched characteristic curve and the characteristic peak intensity.
摘要翻译：测量具有不同基质的乳制品中三聚氰胺含量的拉曼光谱法。该方法包括：（a）建立具有不同矩阵的乳制品特征曲线数据库; （b）取几份具有一定未知基质的乳制品，并加入其中浓度不同的三聚氰胺标准溶液，以获得其中已知三聚氰胺的相对浓度的一系列乳制品样品; （c）进行拉曼光谱测试分析并获得相应的特征峰强度，以获得特征曲线的斜率，显示特征峰强度与三聚氰胺的相对浓度的变化; （d）使用乳制品样品的特征曲线的斜率来搜索步骤（a）的数据库，以找到匹配的特征曲线，以及（e）通过使用匹配的特征曲线计算乳制品中三聚氰胺的浓度，特征峰强度。

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