公开(公告)号：EP3236294A3

公开(公告)日：2018-01-24

申请号：EP17163487.6

申请日：2017-03-29

申请人： Nuctech Company Limited ,  Tsinghua University

发明人： LI, Jianmin ,  LI, Yulan ,  ZHANG, Li ,  LI, Liang ,  ZONG, Chunguang ,  YU, Hao ,  KANG, Kejun ,  LI, Yuangjing ,  CHEN, Zhiyiang ,  MIATO, Qitian ,  CHENG, Jianping

IPC分类号： G01V5/00

CPC分类号： G01V5/005

摘要： The present invention discloses a container CT inspection system (100), including a scanning device (110), wherein the scanning device (110) includes a radioactive source device (111) and a detector array (112), the scanning device (110) further includes a first rail (113) and a second rail (114), which are respectively arranged on inner layer and outer layer, the radioactive source device (111) is arranged on the first rail (113), and the detector array (112) is arranged on the second rail (114). According to the present invention, the radioactive source device (111) and the detector array (112) are respectively supported by different rails (113, 114), which improves the situation that a ring-shaped rotating frame in the prior art needs to bear a very large load, and for each rail in the first rail (113) and the second rail (114), the strength requirements are greatly reduced relative to the ring-shaped rotating frame, therefore the processing difficulty is effectively reduced compared with the container CT inspection system in the prior art.

摘要翻译： 本发明公开了一种容器CT检查系统，包括扫描装置，所述扫描装置包括放射源装置和检测器阵列，所述扫描装置， 还包括分别设置在内层和外层上的第一导轨113和第二导轨114，所述放射源装置111设置在所述第一导轨113上，所述探测器阵列112 ）布置在第二轨道（114）上。 根据本发明，放射源装置（111）和检测器阵列（112）分别由不同的轨道（113,114）支撑，改善了现有技术中的环形旋转架需要承受的情况 非常大的载荷，并且对于第一轨道113和第二轨道114中的每个轨道，相对于环形旋转框架，强度要求大大降低，因此与容器相比加工难度有效地降低 现有技术中的CT检查系统。

公开(公告)号：EP1953700B1

公开(公告)日：2012-05-02

申请号：EP06791243.6

申请日：2006-10-11

申请人： Tsinghua University ,  Nuctech Company Limited

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：EP3796049A1

公开(公告)日：2021-03-24

申请号：EP20187211.6

申请日：2020-07-22

申请人： Tsinghua University ,  Nuctech Company Limited

发明人： ZENG, Zhi ,  PAN, Xingyu ,  WANG, Xuewu ,  LI, Jungli ,  ZENG, Ming ,  LI, Jianmin ,  ZHAO, Ziran ,  CHENG, Jianping ,  MA, Hao ,  ZHANG, Hui ,  YU, Hao ,  LIU, Bicheng

IPC分类号： G01V5/00 ,  G01N23/20

摘要： The present disclosure provides a substance identification device and a substance identification method. The substance identification device comprises: a classifier establishing unit (10) configured to establish a classifier based on scattering density values reconstructed for a plurality of known sample materials, wherein the classifier comprises a plurality of feature regions corresponding to a plurality of characteristic parameters for the plurality of known sample materials, respectively; and an identification unit (20) for a material to be tested, configured to match the characteristic parameter of the material to be tested with the classifier, and to identify a type of the material to be tested by obtaining a feature region corresponding to the characteristic parameter of the material to be tested.

公开(公告)号：EP3333594A1

公开(公告)日：2018-06-13

申请号：EP17194043.0

申请日：2017-09-29

申请人： Tsinghua University ,  Nuctech Company Limited

发明人： KANG, Kejun ,  CHENG, Jianping ,  CHEN, Zhiqiang ,  ZHAO, Ziran ,  LI, Junli ,  WANG, Xuewu ,  ZENG, Zhi ,  ZENG, Ming ,  WANG, Yi ,  ZHANG, Qingjun ,  GU, Jianping ,  YI, Xi ,  LIU, Bicheng ,  XU, Guangming ,  WANG, Yongqiang

IPC分类号： G01V5/00

CPC分类号： G01N23/04 ,  G01N23/046 ,  G01N23/06 ,  G01N23/20008 ,  G01N2223/304 ,  G01N2223/33 ,  G01N2223/401 ,  G01N2223/419 ,  G01N2223/652 ,  G01V5/0016 ,  G01V5/0025 ,  G01V5/0091

摘要： Inspection devices and inspection method are disclosed. The inspection method includes: performing X-ray scanning on an object being inspected so as to generate an image of the object being inspected; dividing the image of the object being inspected to determine at least one region of interest; detecting interaction between a cosmic ray and the region of interest to obtain a detection value; calculating a scattering characteristic value and/or an absorption characteristic value of the cosmic ray in the region of interest based on size information of the region of interest and the detection value; and discriminating a material attribute of the region of interest by means of the scattering characteristic value and/or the absorption characteristic value. With the above technical solutions, inspection accuracy and inspection efficiency may be improved.

公开(公告)号：EP3236294A2

公开(公告)日：2017-10-25

申请号：EP17163487.6

申请日：2017-03-29

申请人： Nuctech Company Limited ,  Tsinghua University

发明人： LI, Jianmin ,  LI, Yulan ,  ZHANG, Li ,  LI, Liang ,  ZONG, Chunguang ,  YU, Hao ,  KANG, Kejun ,  LI, Yuangjing ,  CHEN, Zhiyiang ,  MIATO, Qitian ,  CHENG, Jianping

IPC分类号： G01V5/00

CPC分类号： G01V5/005

摘要： The present invention discloses a container CT inspection system (100), including a scanning device (110), wherein the scanning device (110) includes a radioactive source device (111) and a detector array (112), the scanning device (110) further includes a first rail (113) and a second rail (114), which are respectively arranged on inner layer and outer layer, the radioactive source device (111) is arranged on the first rail (113), and the detector array (112) is arranged on the second rail (114). According to the present invention, the radioactive source device (111) and the detector array (112) are respectively supported by different rails (113, 114), which improves the situation that a ring-shaped rotating frame in the prior art needs to bear a very large load, and for each rail in the first rail (113) and the second rail (114), the strength requirements are greatly reduced relative to the ring-shaped rotating frame, therefore the processing difficulty is effectively reduced compared with the container CT inspection system in the prior art.

公开(公告)号：EP1953700A1

公开(公告)日：2008-08-06

申请号：EP06791243.6

申请日：2006-10-11

申请人： Tsinghua University ,  Nuctech Company Limited

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： It is disclosed a system and a method for reconstructing an image by using a straight-line trajectory scan to avoid image spatial resolution reduction due to interpolations in angular direction and detector direction during data rebinning. This system comprises: a projection data conversion section for converting projection data from straight-line trajectory scan into projection data under quasi-parallel-beam scan; a filtration section for obtaining filtered projection data by convoluting the projection data under quasi-parallel-beam scan with a predetermined convolutional kernel; and a back-projection section for reconstructing an image by back-projecting the filtered projection data with a weighting factor. By using the inventive system and method, the spatial resolution in the reconstructed image is improved, and the influence of data truncation on the reconstructed image is reduced. The present invention applies the filtration and back-projection mode, and thus has general advantages of the filtration and back projection, such as simplicity and efficiency. And it is easy to be parallelized and accelerated.

摘要翻译： 它是游离缺失盘的系统和用于通过使用直线轨迹扫描，以避免图像的空间分辨率降低重建的图像的方法，由于数据重排期间在角度方向和方向检测器的内插。 该系统包括：用于从直线轨迹变换的投影数据的投影数据转换部分扫描到投影数据下准平行光束扫描; 用于通过卷积下准平行光束投影数据与预定的卷积内核扫描获得经滤波的投影数据的过滤部; 和用于通过反投影用的加权因子的滤波的投影数据重建图像的背投影部。 通过使用本发明的系统和方法，在重构图像中的空间分辨率得到改善，并且重建的图像上的数据截断的影响被降低。 本发明适用的过滤和反投影模式，并由此具有过滤和反投影，颜色的一般优点：如简单和效率。 而且很容易被并行化和加速。