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1. 发明授权

US10495776B2 Scan method, scan system and radiation scan controller 有权
公开(公告)号：US10495776B2
公开(公告)日：2019-12-03
申请号：US15289206
申请日：2016-10-10
申请人： NUCTECH COMPANY LIMITED , Tsinghua University
发明人： Kejun Kang , Yaohong Liu , Ziran Zhao , Wei Jia , Jianping Gu , Chuanxiang Tang , Huaibi Chen , Jianjun Gao , Wei Yin , Xiying Liu
IPC分类号： G01V5/00 , G01T1/29 , G01N23/04
CPC分类号： G01V5/0016 , G01N23/04 , G01T1/29
摘要： This invention provides a scan method, scan system and radiation scan controller, and relates to the field of radiation. Wherein, the scan method of this invention comprises: 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.

2. 发明申请

US20150085989A1 APPARATUS AND A METHOD FOR GENERATING A FLATTENING X-RAY RADIATION FIELD 有权
标题翻译：装置和产生平滑X射线辐射场的方法
公开(公告)号：US20150085989A1
公开(公告)日：2015-03-26
申请号：US14494178
申请日：2014-09-23
申请人： NUCTECH COMPANY LIMITED , Tsinghua University
发明人： Kejun Kang , Chuanxiang Tang , Huaping Tang , Huaibi Chen , Wenhui Huang
IPC分类号： H01J35/14 , H01J35/10
CPC分类号： H01J35/14 , A61N5/1077 , H01J35/06 , H01J35/106 , H01J2235/068 , H01J2235/086 , H01J2235/1262 , H05H7/06
摘要： 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.
摘要翻译：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。

3. 发明授权

US10649104B2 Methods and apparatuses for reconstructing incident energy spectrum for a detector 有权
公开(公告)号：US10649104B2
公开(公告)日：2020-05-12
申请号：US15597003
申请日：2017-05-16
申请人： Tsinghua University , NUCTECH COMPANY LIMITED
发明人： Liang Li , Zhiqiang Chen , Li Zhang , Ziran Zhao , Yuxiang Xing , Kejun Kang , Lan Zhang , Ruizhe Li
IPC分类号： G01T1/36 , G01N23/223 , G01T7/00
摘要： 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.

4. 发明授权

US10578765B2 Scan method, scan system and radiation scan controller 有权
公开(公告)号：US10578765B2
公开(公告)日：2020-03-03
申请号：US16253221
申请日：2019-01-22
申请人： NUCTECH COMPANY LIMITED , TSINGHUA UNIVERSITY
发明人： Kejun Kang , Yaohong Liu , Ziran Zhao , Wei Jia , Jianping Gu , Chuanxiang Tang , Huaibi Chen , Jianjun Gao , Wei Yin , Xiying Liu
IPC分类号： G01V5/00 , G01T1/29 , G01N23/04
摘要： 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.

5. 发明授权

US10339673B2 Dual-energy ray imaging methods and systems 有权
公开(公告)号：US10339673B2
公开(公告)日：2019-07-02
申请号：US15129455
申请日：2015-12-23
申请人： Tsinghua University , NUCTECH COMPANY LIMITED
发明人： Liang Li , Zhiqiang Chen , Kejun Kang , Li Zhang , Ziran Zhao , Yuxiang Xing , Yongshun Xiao , Jianping Gu , Juan Zheng
IPC分类号： G01N23/04 , G06T11/00 , G06T7/00
摘要： 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.

6. 发明授权

US10152774B2 Method and system for estimating point spread function 有权
公开(公告)号：US10152774B2
公开(公告)日：2018-12-11
申请号：US15217613
申请日：2016-07-22
申请人： Tsinghua University , Nuctech Company Limited
发明人： Kejun Kang , Zhiqiang Chen , Yuanjing Li , Li Zhang , Ziran Zhao , Yaohong Liu , Jianping Gu , Zhiming Wang
IPC分类号： G06K9/00 , G06T5/00 , G06T7/77 , G06T7/44
摘要： 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.

7. 发明授权

US10151712B2 Vehicle-carried quick inspection system 有权
公开(公告)号：US10151712B2
公开(公告)日：2018-12-11
申请号：US14982374
申请日：2015-12-29
申请人： Tsinghua University , Nuctech Company Limited
发明人： Kejun Kang , Xuejing Yang , Shangmin Sun , Yu Hu , Jingyu Gu , Weifeng Yu , Ke Li , Lei Liu , Youai Yu
IPC分类号： H05G1/46 , G01N23/10 , G01N23/18 , B62D65/00 , G01V5/00
摘要： 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.

8. 发明授权

US10074166B2 Systems and methods for inspecting cargoes 有权
公开(公告)号：US10074166B2
公开(公告)日：2018-09-11
申请号：US14700249
申请日：2015-04-30
申请人： Tsinghua University , Nuctech Company Limited
发明人： Kejun Kang , Zhiqiang Chen , Li Zhang , Ziran Zhao , Yaohong Liu , Jian Zhang , Jianping Gu , Qiang Li , Duokun Zhang
IPC分类号： G06T7/00 , G01N23/10 , G01V5/00 , G01N23/04 , G06K9/46 , G06K9/52 , G06K9/62
CPC分类号： G06T7/0004 , G01N23/04 , G01V5/0016 , G06K9/4604 , G06K9/4642 , G06K9/52 , G06K9/6215 , G06K9/6256 , G06K2009/4666
摘要： 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.

9. 发明授权

US09655220B2 CT devices and methods thereof 有权
公开(公告)号：US09655220B2
公开(公告)日：2017-05-16
申请号：US14758779
申请日：2013-10-31
申请人： TSINGHUA UNIVERSITY , NUCTECH COMPANY LIMITED
发明人： Kejun Kang , Chuanxiang Tang , Ziran Zhao , Zhe Zhang
IPC分类号： A61B6/00 , H05G1/32 , H05G1/10 , H05H7/18 , G01N23/04 , A61B6/03 , H01J35/08 , H05G2/00
CPC分类号： H05G1/32 , A61B6/032 , A61B6/4028 , A61B6/4275 , G01N23/046 , G01N2223/419 , H01J35/08 , H01J2235/087 , H05G1/10 , H05G2/00 , H05H7/18
摘要： 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.

10. 发明申请

US20150342013A1 CT DEVICES AND METHODS THEREOF 有权
标题翻译： CT装置及其方法
公开(公告)号：US20150342013A1
公开(公告)日：2015-11-26
申请号：US14758484
申请日：2013-11-21
申请人： TSINGHUA UNIVERSITY , NUCTECH COMPANY LIMITED
发明人： Kejun Kang , Chuanxiang Tang , Ziran Zhao , Zhe Zhang
IPC分类号： H05G1/10 , A61B6/03 , G01N23/04
CPC分类号： H05G1/10 , A61B6/032 , A61B6/40 , A61B6/4064 , G01N23/046 , G01N2223/308 , G01N2223/419 , H01J35/06 , H01J35/08 , H01J2235/086
摘要： 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.
摘要翻译：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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