公开(公告)号：EP3112909A4

公开(公告)日：2017-08-16

申请号：EP15869283

申请日：2015-12-14

申请人： NUCTECH CO LTD

发明人： CHEN ZHIQIANG ,  ZHANG LI ,  WANG SHUO ,  SUN YUNDA ,  HUANG QINGPING ,  TANG ZHI

IPC分类号： G01V5/00

CPC分类号： G01V5/00 ,  G01V5/005

摘要： Disclosed is a method for positioning a target in a three-dimensional CT image and a CT system for security inspection. 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 viewing angle; generating at least one set of three-dimensional objects in a depth direction based on the selection; and determining a target object from the set. With the above technical solutions, the user may be facilitated in marking a suspected object in a CT image in a quick manner.

摘要翻译： 公开了一种用于在三维CT图像中定位目标的方法以及用于安全检查的CT系统。 该方法包括：显示三维CT图像; 以视角接收用户对所述三维CT图像的至少一个区域的选择; 基于所述选择在深度方向上生成至少一组三维物体; 并从该组中确定目标对象。 采用上述技术方案，可以方便用户快速标记CT图像中的可疑物体。

公开(公告)号：EP2940458A4

公开(公告)日：2016-08-17

申请号：EP13869213

申请日：2013-10-31

申请人： NUCTECH CO LTD ,  UNIV TSINGHUA

发明人： SHEN LE ,  XING YUXIANG ,  LI YUANJI ,  FENG CHUQING ,  ZHANG LI ,  CHEN ZHIQIANG

IPC分类号： G01N23/04 ,  A61B6/00 ,  A61B6/03 ,  G01T1/29

CPC分类号： G06T11/005 ,  A61B6/032 ,  A61B6/4241 ,  A61B6/4266 ,  A61B6/482 ,  A61B6/5205 ,  G01N23/046 ,  G01N2223/419 ,  G01T1/2985 ,  G06T5/50 ,  G06T2207/10081 ,  G06T2207/20182

摘要： CT imaging systems and methods thereof are disclosed. A common CT scanning is performed (S41) on an object to obtain a common CT imaging. An area of interest is determined (S43) from the image. A CT scanning is performed (S44) on the area of interest under a plurality of energy windows by a photon counter detector. A high resolution image of the area of interest is reconstructed (S46). The discrimination of energy spectrum is higher and the result so obtained is more stable by using a photon counter detector to collect photon count projection data of a plurality of energy windows and thus it may be decomposed into a plurality of basis functions.

公开(公告)号：EP2196797A4

公开(公告)日：2011-01-26

申请号：EP08800648

申请日：2008-09-25

申请人： UNIV TSINGHUA ,  NUCTECH CO LTD

发明人： CHEN ZHIQIANG ,  ZHANG LI ,  WANG XUEWU ,  HU HAIFENG ,  WU HONGXIN ,  LI YUANJING ,  LIU YINONG ,  ZHAO ZIRAN ,  XING YUXIANG ,  TANG HU ,  YI YUMIN ,  ZHANG JINYU

IPC分类号： G01N23/04 ,  G01N23/083 ,  G01N23/087 ,  G01V5/00

CPC分类号： G01N23/10 ,  A61B6/027 ,  G01N23/046 ,  G01N2001/022 ,  G01N2223/419 ,  G01N2223/423 ,  G01N2223/637 ,  G01N2223/639 ,  G01V5/00

公开(公告)号：EP3327430A4

公开(公告)日：2018-08-01

申请号：EP16827253

申请日：2016-07-21

申请人： UNIV TSINGHUA ,  NUCTECH CO LTD

发明人： CHEN ZHIQIANG ,  LI YUANJING ,  ZHANG LI ,  ZHAO ZIRAN ,  LIU YAOHONG ,  ZHENG JUAN ,  GU JIANPING ,  ZONG CHUNGUANG

IPC分类号： G01N23/04 ,  G01V5/00

CPC分类号： G01V5/0041 ,  G01N23/04 ,  G01N23/087

摘要： Disclosed is a method and device for estimating weight of an object to be inspected in an inspection system. An effective atomic number and a high-energy gray value of the dual-energy corresponding to each pixel of the object to be inspected are obtained by a dual-energy radiation scanning. A mass-thickness value for a corresponding pixel is obtained from a pre-created mass-thickness attenuation curve by utilizing the effective atomic numbers and the high-energy gray value of the dual-energy for respective pixels. Weight information for at least a part of the object to be inspected is calculated by multiplying the mass-thickness value by the area of the pixel. Such a method may accurately calculate the weight of the object to be inspected and save the cost for a conventional weighing hardware.

公开(公告)号：EP3115773A4

公开(公告)日：2017-10-18

申请号：EP15759349

申请日：2015-03-03

申请人： UNIV TSINGHUA ,  NUCTECH CO LTD

发明人： CHEN ZHIQIANG ,  ZHANG LI ,  YANGDAI TIANYI ,  HUANG QINGPING

IPC分类号： G01N23/10 ,  G01T1/36 ,  G01V5/00

CPC分类号： G01V5/0025 ,  G01N23/083 ,  G01N23/10 ,  G01N2223/50 ,  G01N2223/643 ,  G01T1/36 ,  G01V5/0033 ,  G01V5/0066

公开(公告)号：EP2437051A4

公开(公告)日：2014-10-22

申请号：EP09845117

申请日：2009-12-30

申请人： UNIV TSINGHUA ,  NUCTECH CO LTD

发明人： ZHANG LI ,  CHEN ZHIQIANG ,  LIU YUANYUAN ,  XING YUXIANG ,  ZHAO ZIRAN

IPC分类号： G01N23/087 ,  A61B6/03 ,  G01N23/04 ,  G06T5/00

CPC分类号： G01N23/087 ,  A61B6/032 ,  A61B6/4035 ,  A61B6/4241 ,  A61B6/4266 ,  A61B6/482 ,  G01N2223/419 ,  G01N2223/423 ,  G06T11/005 ,  G06T11/008 ,  G06T2211/408

摘要： Pseudo dual-energy material identification systems and methods with under-sampling are disclosed. The system comprises a ray generating device (11), a mechanic rotation control section (12), a data collecting subsystem (13) comprising a first tier of detectors and a second tier of detectors, and a master control and data processing computer (14). The system utilizes a CT-imaging-based material identification method with under-sampled dual-energy projection data, in which only a few detectors at the second tier are used to perform dual-energy projection data sampling, and optimization is made on the procedure of solving an equation system.

公开(公告)号：EP2589990A4

公开(公告)日：2013-05-08

申请号：EP10838372

申请日：2010-12-29

申请人： UNIV TSINGHUA ,  NUCTECH CO LTD

发明人： CHEN ZHIQIANG ,  ZHAO ZIRAN ,  LI YUANJING ,  WU WANLONG ,  LIU YINONG ,  ZHANG LI ,  LIN DONG ,  SHEN ZONGJUN ,  LUO XILEI ,  ZHENG ZHIMIN ,  JIN YINGKANG ,  CAO SHUO ,  SANG BIN

IPC分类号： G01V8/00 ,  G01K11/00 ,  G01N22/00

CPC分类号： G01V8/005 ,  G01K11/006 ,  G01N22/00

摘要： The present invention discloses a millimeter-wave inspection apparatus. The millimeter-wave inspection apparatus comprises: optics devices (30, 40, 50), configured to receive millimeter-wave energy radiated from an object to be inspected and focus the received millimeter-wave energy; a radiometer receiving device(80) configured to receive the focused millimeter-wave energy and transform the millimeter-wave energy into electrical signal; and an imaging device configured to generate a temperature image of the object to be inspected based on the electrical signal. Compared with the prior art, the millimeter-wave inspection apparatus of the present invention has a simple and compact structure; it would not be harmful to the human health by employing the passive millimeter-wave human body security inspection technology. With the above configuration, the contraband items to be concealed within the human clothing can be efficiently and effectively detected.

公开(公告)号：EP1953700A4

公开(公告)日：2009-08-12

申请号：EP06791243

申请日：2006-10-11

申请人： UNIV TSINGHUA ,  NUCTECH CO LTD

发明人： ZHANG LI ,  GAO HEWEI ,  CHEN ZHIQIANG ,  KANG KEJUN ,  CHENG JIANPING ,  LI YUANJING ,  LIU YINONG ,  XING YUXIANG ,  ZHAO ZIRAN ,  XIAO YONGSHUN

IPC分类号： G06T11/00 ,  A61B6/03

CPC分类号： G01N23/046 ,  A61B6/032 ,  G01N2223/3303 ,  G01N2223/419 ,  G06T11/006 ,  G06T2211/421

摘要： The present invention discloses a system and method for reconstructing an image by rectilinear trajectory scanning, to prevent the image resolution from reducing due to interpolations in angle direction and detector direction while rearranging data. The system includes: a projection data converter for converting the projection data scanned by rectilinear trajectory into the projection data scanned by quasi-parallel beam, a filter for achieving filtered projection data by convolution of a predetermined convolution function kernel and the projection data scanned by quasi-parallel beam, and backprojection means for reconstructing the image by applying weighted backprojection to the filtered projection data. The system and method of the present invention improves the image reconstruction resolution and reduces the influence of data truncation to the image reconstruction. The present invention has some common advantages of the filtered backprojection in the form of the filtered backprojection, such as fast reconstruction and easy simultaneous operation and acceleration etc.

公开(公告)号：EP3128496A4

公开(公告)日：2018-01-10

申请号：EP15875153

申请日：2015-12-23

申请人： UNIV TSINGHUA ,  NUCTECH CO LTD

发明人： CHEN ZHIQIANG ,  ZHANG LI ,  LI JIANMIN ,  ZHAO ZIRAN ,  LIU YAOHONG ,  LI QIANG ,  HU ZHENG ,  GU JIANPING ,  LI YING

IPC分类号： G08G1/017 ,  G01V5/00 ,  G06K9/46

CPC分类号： G08G1/054 ,  G01V5/0008 ,  G01V5/0016 ,  G06K9/4604 ,  G06K9/4642 ,  G08G1/015 ,  G08G1/017

摘要： Disclosed is a vehicle identification method and system. The method includes: acquiring appearance information of an inspected vehicle; obtaining external features of the vehicle based on the appearance information; acquiring a transmission image of the vehicle and obtaining internal features of the vehicle from the transmission image; forming descriptions on the vehicle at least based on the external features and the internal features; and determining a vehicle model of the vehicle from a vehicle model databased by utilizing the descriptions. This method merges various types of modality information, especially introducing the transmission image, and combines the internal structure information with the appearance information, so that the present disclosure can identify a vehicle model more practically.

公开(公告)号：EP3059579A4

公开(公告)日：2017-08-02

申请号：EP15839132

申请日：2015-10-28

申请人： NUCTECH CO LTD

发明人： ZHANG LI ,  CHEN ZHIQIANG ,  JIANG XIAOLEI ,  ZHU XIAOHUA ,  JIN XIN

IPC分类号： G01N23/087 ,  A61B6/00 ,  A61B6/03

CPC分类号： G01N23/046 ,  A61B6/032 ,  A61B6/4035 ,  A61B6/4241 ,  A61B6/4291 ,  A61B6/463 ,  A61B6/482 ,  A61B6/484 ,  G01N23/087 ,  G01N2223/401 ,  G01N2223/408 ,  G01N2223/419 ,  G01N2223/605

摘要： The present disclosure relates to a multi-spectrum X-ray grating-based imaging system and imaging method. The multi-spectrum X-ray grating-based imaging system according to the present disclosure comprises an incoherent X-ray source for emitting X-rays to irradiate an object to be detected, a grating module comprising a first absorption grating and a second absorption grating which are disposed in parallel to each other and are sequentially arranged in an X-ray propagation direction, and an energy-resolved detecting device for receiving the X-rays that have passed through the first absorption grating and the second absorption grating. One of the first absorption grating and the second absorption grating performs phase stepping actions within at least one period; during each phase stepping action, the incoherent X-ray source emits X-rays to irradiate the object to be detected; the energy-resolved detecting device receives the X-rays and performs spectrum identification of the X-rays; and after a series of phase stepping actions and data acquisitions over a period, at each pixel on the energy-resolved detecting device, X-ray intensities in each energy range are represented as an intensity curve.

摘要翻译： 本发明涉及一种基于多光谱X射线光栅的成像系统和成像方法。 根据本发明的基于多光谱X射线光栅的成像系统包括用于发射X射线以照射待检测对象的非相干X射线源，包括第一吸收光栅和第二吸收光栅的光栅模块 它们彼此平行地设置并且顺序地布置在X射线传播方向上;以及能量分辨检测装置，用于接收穿过第一吸收光栅和第二吸收光栅的X射线。 第一吸收光栅和第二吸收光栅中的一个在至少一个周期内执行相位步进动作; 在每个阶段步进动作中，非相干X射线源发射X射线照射待检测物体; 能量分辨检测装置接收X射线并执行X射线的光谱识别; 并且经过一段时间的一系列阶段步进动作和数据采集之后，在能量分解检测设备上的每个像素处，每个能量范围内的X射线强度被表示为强度曲线。