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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.
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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.
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公开(公告)号：US10013615B2
公开(公告)日：2018-07-03
申请号：US15034021
申请日：2014-11-07
Applicant: Nuctech Company Limited
Inventor： Li Zhang , Zhiqiang Chen , Qiang Li , Jian Zhang , Jianping Gu , Jin Cui
CPC classification number: G06K9/00771 , G06K9/00 , G06K9/3241 , G06K9/38 , G06K9/40 , G06K9/42 , G06K9/4642 , G06K9/627 , G06K2209/09
Abstract: The present disclosure discloses an inspection method and device. The method comprises steps of acquiring a perspective image of an inspected object; processing the perspective image to obtain a region of interest; and automatically detecting the region of interest using a cigarette model, to determine whether the region of interest of the perspective image belongs to a cigarette. In the present disclosure, cigarette detection is implemented on a scanned image of goods, particularly a container, which can avoid the problem of detection vulnerability and poor effect of manual image judgment for the conventional manner, and is of significance in fighting against cigarette smuggling.
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公开(公告)号：US20180038970A1
公开(公告)日：2018-02-08
申请号：US15597003
申请日：2017-05-16
Applicant: Tsinghua University , NUCTECH COMPANY LIMITED
Inventor： Liang Li , Zhiqiang Chen , Li Zhang , Ziran Zhao , Yuxiang Xing , Kejun Kang , Lan Zhang , Ruizhe Li
IPC: G01T7/00 , G01N23/223
CPC classification number: G01T7/005 , G01N23/223 , G01N2223/076 , G01N2223/303
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.
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公开(公告)号：US09885801B2
公开(公告)日：2018-02-06
申请号：US14748407
申请日：2015-06-24
Applicant: Tsinghua University , Nuctech Company Limited
Inventor： Zhiqiang Chen , Li Zhang , Xin Jin , Qingping Huang , Le Shen , Yunda Sun
CPC classification number: G01V5/0041 , A61B6/4266 , G01T1/202 , G01T1/362 , G01T7/08 , G01V5/005
Abstract: The present disclosure discloses a detector device comprising a plurality of detector assemblies. Each detector assembly comprises at least one detection crystal units having a first energy response and those having a second energy response, which are both arranged along a first direction at intervals, each detection crystal unit having a first/second energy response including at least one detection crystals having a first/second energy response arranged along a second direction. The at least one detection crystal units having a first energy response and the at least one detection crystal units having a second energy response are, at least partially, alternatively arranged along the first direction when viewed from an incidence direction of the X-ray. The present disclosure also discloses a dual energy CT system having the detector device and a CT detection method using this system.
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Patent Agency Ranking
公开(公告)号：US20180022301A1
公开(公告)日：2018-01-25
申请号：US15609013
申请日：2017-05-31
Applicant: NUCTECH COMPANY LIMITED , Tsinghua University
Inventor： Jianmin Li , Hao Yu , Zhiqiang Chen , Yuanjing Li , Yulan Li , Li Zhang , Jingyu Gu , Dongyu Wang
IPC: B60R16/033 , H01M10/052 , H01M10/42 , H02J7/00
CPC classification number: B60R16/033 , H01M10/052 , H01M10/4207 , H02J3/14 , H02J7/0021 , Y02B70/3225 , Y04S20/222
Abstract: The present disclosure discloses an in-vehicle detection system and power supply system and power supply controller, which relates to the power supply control field. The power supply system comprises a low-power generator; a battery pack for supplying power to the in-vehicle detection system; a charger electrically connected to the low-power generator and the battery pack, respectively; and a power supply controller electrically connected to the battery pack and the low-power generator, respectively. The present disclosure uses a low-power generator and a battery pack to substitute a high-power generator, which can reduce the requirement on a peak power of the generator by the in-vehicle detection system, and improve the efficiency of the power supply. In addition, since a low-power generator and a lithium battery pack are used to substitute the high-power generator, it is favorable to the lightweight design of the in-vehicle detection system, and meanwhile reduces noises and vibration, and is favorable to improving the user experience and performance metrics.
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47.发明授权公开(公告)号：US09773326B2
公开(公告)日：2017-09-26
申请号：US14751044
申请日：2015-06-25
Applicant: TSINGHUA UNIVERSITY , NUCTECH COMPANY LIMITED
Inventor： Li Zhang , Xin Jin , Qingping Huang , Yunda Sun
CPC classification number: G06T11/003 , A61B6/032 , A61B6/5205 , A61B6/583 , G01N23/046 , G01V5/0041 , G01V5/005 , G06T2207/10081
Abstract: The present invention provides a CT image calibration method and device and a CT system. The method includes: arranging a fixed calibration element at the outside of a channel area and within the maximal reconstruction area of a CT scanning device, and storing the theoretical value of the fixed calibration element; collecting the projection data of the fixed calibration element to obtain the actual reconstructed image of the fixed calibration element; and comparing the actual reconstructed image with the stored corresponding theoretical value, to establish a mapping function for correcting the actual reconstructed image into the theoretical value. By adopting the present invention, the calibration quality can be effectively improved, the image calibration effect is enhanced, the reliability of the CT scanning device is improved and the maintenance cost is saved, thus the practical application value is very high.
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公开(公告)号：US20170068017A1
公开(公告)日：2017-03-09
申请号：US15230316
申请日：2016-08-05
Applicant: NUCTECH COMPANY LIMITED , NUCTECH JIANGSU COMPANY LIMITED
Inventor： Ziran ZHAO , Zhiqiang Chen , Wanlong Wu , Li Zhang , Yingkang Jin , Ming Ruan
IPC: G01V5/00
CPC classification number: G01V5/0016
Abstract: A safety inspection apparatus is disclosed in embodiments of the present invention. The safety inspection apparatus includes: an x-ray source including a ray emission focal spot; and a plurality of detector modules each of which has a ray receiving surface, and which are arranged along a plurality of straight line segments. The plurality of straight line segments include a first straight line segment and two second straight line segments, and, the two second straight line segments extend from the two ends of the first straight line segment towards the x-ray source side, respectively. In a plane where the sectorial ray beam is located, a normal to the ray receiving surface of each of the detector modules at a midpoint of the ray receiving surface of the each of the detector modules passes generally through the ray emission focal spot of the x-ray source.
Abstract translation: 在本发明的实施例中公开了一种安全检查装置。 安全检查装置包括：x射线源，包括射线发射焦点; 以及多个检测器模块，每个检测器模块具有一个光线接收表面，并沿着多条直线段布置。 多个直线段包括第一直线段和两个第二直线段，并且两个第二直线段分别从第一直线段的两端朝向x射线源侧延伸。 在扇形射线束所在的平面中，每个检测器模块的射线接收表面的中点处的每个检测器模块的射线接收表面的法线通常通过x的射线发射焦斑 来源。
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49.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
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。
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50.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
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。
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