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1.发明申请公开(公告)号：US20150085989A1
公开(公告)日：2015-03-26
申请号：US14494178
申请日：2014-09-23
Applicant: NUCTECH COMPANY LIMITED , Tsinghua University
Inventor： Kejun Kang , Chuanxiang Tang , Huaping Tang , Huaibi Chen , Wenhui Huang
CPC classification number: H01J35/14 , A61N5/1077 , H01J35/06 , H01J35/106 , H01J2235/068 , H01J2235/086 , H01J2235/1262 , H05H7/06
Abstract: An apparatus and a method are for generating a flattening x-ray radiation field. The apparatus includes: plurality of electron accelerators for generating high-energy electron beam current; and a common target unit including a vacuum target chamber, a target and plurality of input connectors. The plurality of input connectors are connected to one side of the vacuum target chamber and the target is installed at the other side of the vacuum target chamber opposing the plurality of input connectors, the axes of which intersect in pairs at one point in an predetermined included angle. The plurality of electron accelerators are connected to the plurality of input connectors.
Abstract translation: 一种用于产生平坦的x射线辐射场的装置和方法。 该装置包括：多个用于产生高能电子束电流的电子加速器; 以及包括真空靶室，靶和多个输入连接器的公共目标单元。 多个输入连接器连接到真空靶室的一侧，并且目标件安装在真空靶室的与多个输入连接器相对的另一侧，多个输入连接器的轴线在预定的包括的一个点处成对地相交 角度。 多个电子加速器连接到多个输入连接器。
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公开(公告)号：US10649104B2
公开(公告)日：2020-05-12
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: G01T1/36 , G01N23/223 , G01T7/00
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：US10578765B2
公开(公告)日：2020-03-03
申请号：US16253221
申请日：2019-01-22
Applicant: NUCTECH COMPANY LIMITED , TSINGHUA UNIVERSITY
Inventor： Kejun Kang , Yaohong Liu , Ziran Zhao , Wei Jia , Jianping Gu , Chuanxiang Tang , Huaibi Chen , Jianjun Gao , Wei Yin , Xiying Liu
Abstract: This invention provides a scan method, scan system and radiation scan controller, and relates to the field of radiation. The scanning method includes obtaining detection data of an object to be inspected under radiation scanning using a detector, adjusting an accelerator output beam dose rate and/or an output electron beam energy level of a radiation emission device according to the detection data. With this method, working conditions of the accelerator of the radiation emission device may be adjusted according to the detection data detected by the detector, so that for a region having a larger mass thickness, a higher output beam dose rate or a higher electron beam output energy level is adopted to guarantee satisfied imaging technical indexes, for a region having a smaller mass thickness, a lower output beam dose rate or a lower electron beam output energy level is adopted to reduce the environmental dose level while guaranteeing satisfied imaging technical indexes.
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公开(公告)号：US10339673B2
公开(公告)日：2019-07-02
申请号：US15129455
申请日：2015-12-23
Applicant: Tsinghua University , NUCTECH COMPANY LIMITED
Inventor： Liang Li , Zhiqiang Chen , Kejun Kang , Li Zhang , Ziran Zhao , Yuxiang Xing , Yongshun Xiao , Jianping Gu , Juan Zheng
Abstract: Disclosed is a dual-energy ray imaging method and system. The method comprises: calculating the mass thicknesses of the materials in the overlapped area of two materials by using a calibrated surface fitting method, and then decomposing a pair of original high-energy and low-energy data for this pixel into two high-low-energy data sets corresponding to the two materials, and finally calculating and acquiring the composition result of different materials for each pixel. The disclosure is especially advantageous in that the problem of error recognition of materials due to the two overlapped materials can be eliminated and the stratified imaging of multiple materials can be achieved, thereby improving the accuracy of the substance recognition and reducing the rate of false positive and false negative which is very important to the applications in the field of security check and anti-smuggling.
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公开(公告)号：US10152774B2
公开(公告)日：2018-12-11
申请号：US15217613
申请日：2016-07-22
Applicant: Tsinghua University , Nuctech Company Limited
Inventor： Kejun Kang , Zhiqiang Chen , Yuanjing Li , Li Zhang , Ziran Zhao , Yaohong Liu , Jianping Gu , Zhiming Wang
Abstract: The present disclosure relates to a method and device for estimating a point spread function. In one implementation, a method includes capturing, by a scanning device, an image by scanning a plurality of rectangle blocks which are same sized and closely arranged, wherein the plurality of rectangle blocks are made of different materials and/or have different mass thicknesses, and an incident direction of rays is perpendicular to a scanning direction and a surface of the plurality of rectangle blocks arranged closely during scanning; obtaining line spread functions for two directions along a length side and a width side of each of the rectangle blocks based on the scanned image, and obtaining standard deviation parameters of the line spread functions; and combining the standard deviation parameters for the two directions to obtain a two dimensional Point Spread Function (PSF) parameter so as to estimate the point spread function.
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Patent Agency Ranking
公开(公告)号：US10151712B2
公开(公告)日：2018-12-11
申请号：US14982374
申请日：2015-12-29
Applicant: Tsinghua University , Nuctech Company Limited
Inventor： Kejun Kang , Xuejing Yang , Shangmin Sun , Yu Hu , Jingyu Gu , Weifeng Yu , Ke Li , Lei Liu , Youai Yu
Abstract: The present disclosure provides a vehicle-carried inspection system, including a radiation source and a detector, the radiation source and the detector being arranged to form an inspection passage. The inspection system further includes a controller configured to control the radiation source so that a first dose of radiation which is safe to a driver is radiated from the radiation source when the driver's cab of the inspected vehicle passes through a ray beam, and control the radiation source so that the dose of radiation of the radiation source becomes a working dose of radiation larger than the first dose of radiation when the other subsequent portions of the inspected vehicle pass through the ray beam.
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公开(公告)号：US10074166B2
公开(公告)日：2018-09-11
申请号：US14700249
申请日：2015-04-30
Applicant: Tsinghua University , Nuctech Company Limited
Inventor： Kejun Kang , Zhiqiang Chen , Li Zhang , Ziran Zhao , Yaohong Liu , Jian Zhang , Jianping Gu , Qiang Li , Duokun Zhang
CPC classification number: G06T7/0004 , G01N23/04 , G01V5/0016 , G06K9/4604 , G06K9/4642 , G06K9/52 , G06K9/6215 , G06K9/6256 , G06K2009/4666
Abstract: The present disclosure discloses a method and system for inspecting cargoes. The method comprises: acquiring a transmission image of the inspected cargoes; processing the transmission image to acquire an interested region; extracting features from the interested region, and determining cargo information of the inspected cargoes according to the extracted features; and providing a proposed treatment suggestion of the cargoes based on the determined cargo information and at least a part of information in a manifest. The above solution can facilitate an image judgment person to accurately judge whether the concerned cargoes are allowed to pass.
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公开(公告)号：US09655220B2
公开(公告)日：2017-05-16
申请号：US14758779
申请日：2013-10-31
Applicant: TSINGHUA UNIVERSITY , NUCTECH COMPANY LIMITED
Inventor： Kejun Kang , Chuanxiang Tang , Ziran Zhao , Zhe Zhang
CPC classification number: H05G1/32 , A61B6/032 , A61B6/4028 , A61B6/4275 , G01N23/046 , G01N2223/419 , H01J35/08 , H01J2235/087 , H05G1/10 , H05G2/00 , H05H7/18
Abstract: CT devices and methods thereof are disclosed. The CT device comprises a circular electron gun array including a plurality of electron guns, each of the electron guns is configured to emit electron beams along the radial direction of the circular electron gun array in sequence according to a predetermine pulse sequence; an acceleration cavity disposed inside of a circle on which the circular electron gun array is positioned, including a plurality of nested concentric coaxial cavities that operate in π mode for accelerating electron beams emitted from the respective electron guns of the circular electron gun array; a circular transmission target disposed inside of a circle on which the acceleration cavity is positioned and being bombarded by the accelerated electron beams to generate X-rays; and a circular detector configured to receive the X-rays after they have passed through an object to be detected.
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公开(公告)号：US20160187526A1
公开(公告)日：2016-06-30
申请号：US14982374
申请日：2015-12-29
Applicant: Tsunghua University , Nuctech Company Limited
Inventor： Kejun Kang , Xuejing Yang , Shangmin Sun , Yu Hu , Jingyu Gu , Weifeng Yu , Ke Li , Lei Liu , Youai Yu
IPC: G01V5/00
CPC classification number: G01N23/10 , B62D65/005 , G01N23/18 , G01N2201/0216 , G01N2223/301 , G01N2223/306 , G01N2223/308 , G01V5/0016 , G01V5/0066 , G05B2219/37125 , G05B2219/40544 , H05G1/46
Abstract: A vehicle-carried quick inspection system includes an X-ray source, a detector, the X-ray source and the detector being arranged to form an inspection passage, a controller configured to control the X-ray source so that X-ray irradiation dose is extremely low when the driver's cab of the inspected vehicle passes through an X-ray beam, and control the X-ray source so that the irradiation dose of the X-ray source becomes a working dose when the other subsequent portions of the inspected vehicle pass through the X-ray beam. A mobile and fully automated security inspection system is obtained and quick inspection can be achieved, while protecting the driver from being damaged from X-ray irradiation.
Abstract translation: 一种车载快速检查系统，包括X射线源，检测器，X射线源和检测器布置成形成检查通道;控制器，被配置为控制X射线源，使得X射线照射剂量 当被检查车辆的驾驶室通过X射线束时，极低，并且控制X射线源，使得当被检查车辆的其他后续部分的X射线源的照射剂量变为工作剂量时 通过X射线束。 获得移动和全自动化的安全检查系统，并可以快速检查，同时保护驾驶员免受X射线照射的损伤。
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公开(公告)号：US20150342013A1
公开(公告)日：2015-11-26
申请号：US14758484
申请日：2013-11-21
Applicant: TSINGHUA UNIVERSITY , NUCTECH COMPANY LIMITED
Inventor： Kejun Kang , Chuanxiang Tang , Ziran Zhao , Zhe Zhang
CPC classification number: H05G1/10 , A61B6/032 , A61B6/40 , A61B6/4064 , G01N23/046 , G01N2223/308 , G01N2223/419 , H01J35/06 , H01J35/08 , H01J2235/086
Abstract: CT devices and methods thereof are disclosed. The CT device comprises a circular electron beam emission array including a plurality of electron beam emission units that are distributed uniformly along a circle, wherein each electron beam emission unit emits electron beams that are substantially parallel to an axis of the circular electron beam emission array in sequence under the control of a control signal; a circular reflection target which is disposed to be coaxial with the circular electron beam emission array, wherein the electron beams bombard the circular reflection target to generate X-rays that intersect the axis of the circular electron beam emission array; and a circular detector array which is disposed to be coaxial with the circular reflection target and configured to include a plurality of detection units which receive the X-rays after they have passed through an object to be detected.
Abstract translation: 公开了CT装置及其方法。 CT装置包括圆形电子束发射阵列，其包括沿着圆均匀分布的多个电子束发射单元，其中每个电子束发射单元发射基本上平行于圆形电子束发射阵列的轴的电子束， 控制信号控制下的序列; 设置为与圆形电子束发射阵列同轴的圆形反射目标，其中电子束轰击圆形反射目标以产生与圆形电子束发射阵列的轴相交的X射线; 以及圆形检测器阵列，其设置成与圆形反射目标同轴并且被配置为包括多个检测单元，其在它们已经通过待检测物体之后接收X射线。
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