公开(公告)号：EP3454048A1

公开(公告)日：2019-03-13

申请号：EP17792367.9

申请日：2017-02-03

Applicant: Tsinghua University ,  Nuctech Company Limited

Inventor： XING, Yuxiang ,  GUO, Xiaoyue ,  DENG, Zhi ,  SHEN, Le ,  ZHANG, Li ,  CHEN, Zhiqiang ,  LI, Liang

IPC: G01N23/04

Abstract: An X-ray detection method and an X-ray detector are provided. The X-ray detection method according to embodiments of the present disclosure includes: dividing an energy range of photons emitted by an X-ray source into a number N of energy windows, where N is an integer greater than 0; obtaining a weighting factor for each of the number N of energy windows based on linear attenuation coefficients of a substance of interest and a background substance of an imaging target; obtaining a weighting factor matrix for M output channels of an X-ray detector based on the weighting factor for each of the number N of energy windows, where M is an integer greater than 0; and obtaining output results of the M output channels based on the weighting factor matrix and numbers of photons having an energy range falling into individual energy windows of the number N of energy windows.

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

Applicant: Nuctech Company Limited ,  Tsinghua University

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

IPC: G01V5/00

CPC classification number: G01V5/005

Abstract: 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.

Abstract translation: 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：EP2749873B1

公开(公告)日：2018-02-21

申请号：EP13840115.3

申请日：2013-07-15

Applicant: Nuctech Company Limited ,  Tsinghua University

Inventor： ZHANG, Li ,  CHEN, Zhiqiang ,  HUANG, Qingping ,  SUN, Yunda ,  JIN, Xin ,  SHEN, Le ,  XING, Yuxiang ,  TANG, Hu ,  LI, Yuanjing ,  HONG, Mingzhi ,  LIANG, Jinning ,  REN, Qianlu ,  LI, Liang ,  DING, Hui ,  CHANG, Ming

IPC: G01N23/04 ,  G01T1/20

CPC classification number: A61B6/482 ,  A61B6/0457 ,  A61B6/4241 ,  A61B6/542 ,  G01N23/046 ,  G01N2223/419 ,  G01N2223/643 ,  G01T1/242 ,  G01V5/0041 ,  H01L27/14601 ,  H01L27/14634 ,  H01L27/14658 ,  H01L27/14676 ,  H01L27/14806 ,  H01L27/14812

Abstract: A detection device for a CT system comprises a low-energy detector assembly; and a high-energy detector assembly disposed under the low-energy detector assembly. The high-energy detector assembly comprises: a plurality of rows of high-energy detectors arranged at predetermined intervals. With the detection device, detectors and data acquisition units are greatly reduced. A high-resolution three-dimensional CT image is acquired while high-accuracy hazardous article alarm is achieved. The cost of manufacture of the system is greatly decreased while high system performance is ensured.

公开(公告)号：EP3901669A1

公开(公告)日：2021-10-27

申请号：EP19897922.1

申请日：2019-09-10

Applicant: Nuctech Company Limited ,  Tsinghua University

Inventor： ZHANG, Li ,  CHEN, Zhiqiang ,  HUANG, Qingping ,  SUN, Yunda ,  JIN, Xin ,  SHEN, Le ,  LI, Liang ,  ZHAO, Tiao

IPC: G01V5/00 ,  G01N23/046

Abstract: The present application discloses a CT system and a detection apparatus for the CT system. The detection apparatus includes: a high-energy detector assembly including a plurality of rows of high-energy detectors arranged along a predetermined trajectory; a low-energy detector assembly including a plurality of rows of low-energy detectors arranged at intervals along the predetermined trajectory, the low-energy detector assembly and the high-energy detector assembly being disposed in a stack; a number of rows of the low-energy detectors is smaller than a number of rows of the high-energy detectors; and each row of the low-energy detectors covers a row of the high-energy detectors. According to the CT system and the detection apparatus for the CT system provided by the embodiments of the present application, the ability to distinguish materials is improved.

公开(公告)号：EP3505977A1

公开(公告)日：2019-07-03

申请号：EP19150074.3

申请日：2019-01-02

Applicant: Tsinghua University ,  Nuctech Company Limited

Inventor： KANG, Kejun ,  LI, Jianmin ,  NI, Xiulin ,  LI, Yulan ,  LI, Yuanjing ,  CHEN, Zhiqiang ,  ZHANG, Li ,  LI, Liang ,  ZOU, Xiang ,  YU, Weifeng ,  ZHOU, Hejun ,  ZONG, Chunguang

IPC: G01V5/00

Abstract: The present disclosure relates to the technical field of CT detection, and in particular to a CT inspection system and a CT imaging method. The CT inspection system provided by the present disclosure comprises a radioactive source device, a detection device, a rotation monitoring device and an imaging device, wherein the detection device obtains detection data at a frequency that is N times a beam emitting frequency of the radioactive source device; the rotation monitoring device detects a rotation angle of the detection device and transmits a signal to the imaging device each time the detection device rotates by a preset angle; the imaging device determines a rotational position of the detection device each time the radioactive source device emits a beam according to the signal transmitted by the rotation monitoring device and the detection data of the detection device, and generates a CT image based on the detection data and the rotational position of the detection device each time the radioactive source device emits a beam. The present disclosure can accurately determine the rotational position of the detection device each time the radioactive source device emits a beam, so that it is possible to effectively reduce the image deformation and improve the accuracy of detection results.

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

Applicant: Nuctech Company Limited ,  Tsinghua University

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

IPC: G01V5/00

CPC classification number: G01V5/005

Abstract: 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：EP2469472A1

公开(公告)日：2012-06-27

申请号：EP11743411.8

申请日：2011-05-11

Applicant: Tsinghua University ,  Nuctech Company Limited

Inventor： LI, Liang ,  CHEN, Zhiqlang ,  ZHANG, Li ,  KANG, Kejun ,  XING, Yuxiang ,  ZHAO, Ziran ,  XIAO, Yongshun ,  HUANG, Zhifeng

IPC: G06T11/00

CPC classification number: G06T11/006 ,  G06T2211/421

Abstract: The invention discloses a method and apparatus for CT image reconstruction. The method for CT image reconstruction of the present invention comprises the steps of: selecting projection data of the same height on a curve having a curvature approximate to that of the scanning circular orbit; implementing weighting processing on the selected projection data; filtering the weighting processed projection data along the horizontal direction; implementing three-dimensional back projection on the filtered projection data along the direction of ray. The apparatus for CT image reconstruction of the present invention comprises a rebinning unit, a weighting unit, a filtering unit and a back projection unit. Employment of the technical solution of the invention can effectively eliminate cone beam artifact under a large cone angle.

Abstract translation: 本发明公开了一种CT图像重建方法和装置。 本发明的CT图像重建方法包括以下步骤：在具有近似于扫描圆形轨道的曲率的曲线上选择相同高度的投影数据; 对所选择的投影数据实施加权处理; 沿着水平方向对加权处理的投影数据进行滤波; 在沿着射线方向的滤波投影数据上实现三维反投影。 本发明的CT图像重构装置包括重组单元，加权单元，滤波单元和背投影单元。 采用本发明的技术方案可以有效地消除大锥角下的锥束伪影。

公开(公告)号：EP3836096A1

公开(公告)日：2021-06-16

申请号：EP20195460.9

申请日：2020-09-10

Applicant: Nuctech Company Limited ,  Tsinghua University

Inventor： ZHANG, Li ,  PENG, Gang ,  HUANG, Qingping ,  LI, Liang ,  YANG, Fan ,  CHEN, Jiabao ,  CHENG, Kun ,  HE, Zhifeng

IPC: G07C9/00 ,  A45C13/18 ,  H04W4/02 ,  H04W4/80

Abstract: The present disclosure provides a smart lock, including: a lock body and an unlocking structure; a Bluetooth communication module configured to receive a lock instruction or an unlock instruction based on Bluetooth communication; and one or more binding tags, each binding tag being associated with a Bluetooth address of the smart lock, wherein the unlocking structure is configured to lock or unlock the smart lock based on the lock instruction or the unlock instruction, or lock or unlock the smart lock based on an operation performed for the one or more binding tags. The present disclosure further provides a system and method for monitoring an object equipped with the smart lock.

公开(公告)号：EP2713156B1

公开(公告)日：2020-05-06

申请号：EP12870875.7

申请日：2012-12-31

Applicant: Nuctech Company Limited ,  Tsinghua University

Inventor： CHEN, Zhiqiang ,  ZHANG, Li ,  ZHAO, Ziran ,  XING, Yuxiang ,  HAO, Jia ,  LI, Liang

IPC: G01N23/04 ,  A61B6/00 ,  A61B6/03 ,  G01V5/00 ,  G01T1/29

公开(公告)号：EP3242126A1

公开(公告)日：2017-11-08

申请号：EP15875158.6

申请日：2015-12-23

Applicant: Tsinghua University ,  Nuctech Company Limited

Inventor： LI, Liang ,  CHEN, Zhiqiang ,  KANG, Kejun ,  ZHANG, Li ,  ZHAO, Ziran ,  XING, Yuxiang ,  XIAO, Yongshun ,  GU, Jianping ,  ZHENG, Juan

IPC: G01N23/04

CPC classification number: G06T11/003 ,  G01N23/04 ,  G06T7/0002 ,  G06T11/008 ,  G06T2207/10081 ,  G06T2207/30112 ,  G06T2211/408

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.

Abstract translation: 公开了一种双能量射线成像方法和系统。 该方法包括：利用校准后的表面拟合方法计算两种材料重叠区域内材料的质量厚度，然后将该像素的一对原始高能量和低能量数据分解为两个高低能量数据， 对应于两种材料的能量数据集，最后计算并获取每个像素的不同材料的成分结果。 本发明特别有利的是，可以消除由于两种重叠材料导致的材料误差识别问题，并且可以实现多种材料的分层成像，从而提高了物质识别的准确性并降低了假阳性率和 这对于安检和缉私领域的应用非常重要。