公开(公告)号：US20240142658A1

公开(公告)日：2024-05-02

申请号：US18574633

申请日：2022-07-06

Applicant: Nuctech Company Limited ,  Tsinghua University

Inventor： Zhiqiang CHEN ,  Li ZHANG ,  Qingping HUANG ,  Yong ZHOU ,  Hui DING ,  Xin JIN ,  Chao JI

IPC: G01V5/226 ,  G01N23/046

CPC classification number: G01V5/226 ,  G01N23/046

Abstract: An inspection system, including: at least one ray source rotatable between at least two scanning positions around a rotation axis, and a rotation angle of at least one ray source between two adjacent scanning positions is greater than an angle of adjacent target spots of each ray source relative to the rotation axis; a detector assembly, and a conveying device configured to carry an object to be inspected. At least one ray source and the detector assembly are movable in a traveling direction relative to the conveying device, so that the object to be inspected may enter an inspection region. When at least one ray source is located at one scanning positions, at least one ray source and the detector assembly move in the traveling direction relative to the conveying device and at least one ray source emits X-rays; after moving a predetermined distance, at least one ray source rotates around the rotation axis to another scanning position.

公开(公告)号：US20240103196A1

公开(公告)日：2024-03-28

申请号：US18284913

申请日：2022-01-18

Applicant: Tsinghua University ,  NUCTECH COMPANY LIMITED

Inventor： Zhiqiang CHEN ,  Li ZHANG ,  Yi CHENG ,  Qingping HUANG ,  Mingzhi HONG ,  Minghua QIU ,  Yao ZHANG ,  Jianxue YANG ,  Lei ZHENG

IPC: G01V5/226

CPC classification number: G01V5/226

Abstract: A radiographic inspection device and a method of inspecting an object are provided. The radiographic inspection device includes a support frame, where an inspection space applicable to inspect an object is formed within the support frame, and the inspection space has a first opening connecting to an outside; a transfer mechanism applicable to carry the object and move through the inspection space; a shielding curtain mounted at the first opening; and a driving mechanism. The driving mechanism includes: a driver mounted on the support frame; and a joint portion, where an upper end of the shielding curtain is connected to the joint portion. The driver is configured to synchronously drive two ends of the joint portion, so that the shielding curtain moves up and down with the joint portion to open or close the first opening.

公开(公告)号：US20230206414A1

公开(公告)日：2023-06-29

申请号：US17928166

申请日：2021-05-24

Applicant: NUCTECH COMPANY LIMITED ,  Tsinghua University

Inventor： Zhiqiang CHEN ,  Li ZHANG ,  Yuanjing LI ,  Yuxiang XING ,  Jie SHI

IPC: G06T7/00 ,  G06T7/33 ,  G06T1/00 ,  G06T1/20

CPC classification number: G06T7/0002 ,  G06T7/33 ,  G06T7/97 ,  G06T1/0007 ,  G06T1/20 ,  G06T2207/10116 ,  G06T2207/20084 ,  G06T2207/30248

Abstract: A method of inspecting a vehicle includes: acquiring a to-be-inspected image of an inspected vehicle (S11); acquiring a visual feature of the to-be-inspected image using a first neural network model (S12); retrieving a template image from a vehicle template library based on the visual feature of the to-be-inspected image (S13); determining a variation region between the to-be-inspected image and the template image (S14); and presenting the variation region to a user (S15). The system of inspecting a vehicle includes a radiation imaging device (150), a display device (130), an image processor (140), and a storage device (120). The present disclosure further includes a computer-readable storage medium.

公开(公告)号：US20230124325A1

公开(公告)日：2023-04-20

申请号：US17967039

申请日：2022-10-17

Applicant: TSINGHUA UNIVERSITY ,  Nuctech Company Limited

Inventor： Zhiqiang CHEN ,  Li ZHANG ,  Xin JIN ,  Hongkai YANG ,  Xiaofei XU ,  Zhenhua ZHAO ,  Siyuan ZHANG ,  Changyu CHEN

IPC: G06T7/00 ,  G06V10/25 ,  A61B6/02 ,  A61B6/03 ,  A61B6/00

Abstract: The present disclosure relates to an imaging system and method for radiographic inspection. The imaging system for radiographic inspection includes an inspection area including an imaging area; a first ray source assembly, all the first targets of which are arranged in a first ray source plane; a first detector assembly, the plurality of first detector units of which are arranged in a detector plane, the detector plane and the first ray source plane are spaced apart from each other in a travelling direction of the object under inspection with a predetermined distance; and a ray source control device, configured such that when the region of interest of the object under inspection is at least partially located in the imaging area, the first ray source assembly emits X-rays simultaneously from at least two first targets to the imaging area at the same time.

公开(公告)号：US20210364455A1

公开(公告)日：2021-11-25

申请号：US17255968

申请日：2020-01-03

Applicant: TSINGHUA UNIVERSITY ,  NUCTECH COMPANY LIMITED ,  NUCTECH (BEIJING) COMPANY LIMITED

Inventor： Jianmin LI ,  Li ZHANG ,  Yuanjing LI ,  Zhiqiang CHEN ,  Hao YU ,  Shangmin SUN ,  Bicheng LIU ,  Weizhen WANG ,  Dongyu WANG ,  Yuan MA ,  Yu HU ,  Chunguang ZONG

IPC: G01N23/20008 ,  G01N23/203

Abstract: The present disclosure provides a back scattering inspection system and a back scattering inspection method. The back scattering inspection system includes a frame and a back scattering inspection device. The rack includes a track arranged vertically or obliquely relative to the ground, and a space enclosed by the track forms an inspection channel; and the back scattering inspection device includes a back scattering ray emitting device and a back scattering detector, and the back scattering inspection device is movably disposed on the track for inspecting an inspected object passing through the inspection channel. The back scattering inspection system can perform back scattering inspection on a plurality of surfaces of the inspected object.

公开(公告)号：US20190204242A1

公开(公告)日：2019-07-04

申请号：US16234621

申请日：2018-12-28

Applicant: TSINGHUA UNIVERSITY ,  NUCTECH COMPANY LIMITED

Inventor： Xiulin NI ,  Jianmin LI ,  Haitian TAN ,  Yulan LI ,  Weifeng YU ,  Yuanjing LI ,  Hejun ZHOU ,  Zhiqiang CHEN ,  Chunguang ZONG ,  Li ZHANG

IPC: G01N23/046 ,  G01V5/00

CPC classification number: G01N23/046 ,  G01N2223/401 ,  G01V5/005

Abstract: The present disclosure relates to the technical field of CT detection, in particular to a CT inspection system and a CT imaging method. The CT inspection system provided by the present disclosure includes a scanning device and an imaging device, wherein the scanning device having a radioactive source device and a detection device is configured to rotate at a non-uniform speed in at least partial process of scanning an object to be detected; and the imaging device generates a CT image based on effective detection data, wherein the effective detection data refer to data acquired each time the detection device rotates by a preset angle. In the present disclosure, the imaging device of the CT inspection system generates a CT image based on data acquired each time the detection device rotates by a preset angle, which, compared with traditional image collection solutions, can effectively reduce image deformation and improve accuracy of detection results.

公开(公告)号：US20190035117A1

公开(公告)日：2019-01-31

申请号：US16045383

申请日：2018-07-25

Applicant: NUCTECH COMPANY LIMITED ,  Tsinghua University

Inventor： Yuxiang XING ,  Li ZHANG ,  Jianmin LI ,  Zhiqiang CHEN ,  Jianping GU

IPC: G06T11/00 ,  G06T5/00 ,  G06T5/20 ,  G06T3/40 ,  G06N3/04

Abstract: A method and device for reconstructing a CT image and a storage medium are disclosed. CT scanning is performed on an object to be inspected to obtain projection data on a first scale. Projection data on a plurality of other scales is generated from the projection data on the first scale. Projection data on each scale is processed on the corresponding scale by using a first convolutional neural network to obtain processed projection data, and a back-projection operation is performed on the processed projection data to obtain a CT image on the corresponding scale. CT images on the plurality of scales are fused to obtain a reconstructed image of the object to be inspected.

公开(公告)号：US20190025447A1

公开(公告)日：2019-01-24

申请号：US16137547

申请日：2018-09-21

Applicant: Tsinghua University ,  Nuctech Company Limited

Inventor： Li ZHANG ,  Zhiqiang CHEN ,  Sen WANG ,  Xiaofei XU ,  Yuanjing LI ,  Xin JIN

IPC: G01T7/00 ,  G01T1/16

Abstract: The present disclosure relates to a data processing method and device. The data processing method comprises steps of: performing detector response calibration based on a detector response obtained by an incidence of rays with known energy into a detector to obtain a detector response model; obtaining a photon counting model of the detector between incident energy spectrum data of the detector and detected energy spectrum data of the detector based on the detector response model; and performing a deconvolution operation on counts of photons in respective energy regions in the detected energy spectrum data of the detector based on the photon counting model of the detector, to obtain real counts of photons in respective energy regions in the incident energy spectrum data of the detector.

公开(公告)号：US20170308766A1

公开(公告)日：2017-10-26

申请号：US15129389

申请日：2015-12-23

Applicant: NUCTECH COMPANY LIMITED

Inventor： Zhiqiang CHEN ,  Li ZHANG ,  Ziran ZHAO ,  Yaohong LIU ,  Duokun ZHANG ,  Jianping GU ,  Qiang LI ,  Jian ZHANG

IPC: G06K9/32 ,  G01N23/04 ,  G01V5/00

CPC classification number: G06K9/3241 ,  G01N23/046 ,  G01V5/0016 ,  G01V5/005

Abstract: An inspection method and system for inspecting whether there is any liquor in goods is provided. The method includes: acquiring a radiation image of goods being inspected; processing on the radiation image to obtain an ROI; inspecting on the ROI using a liquor goods inspection model to determine if the ROI of the radiation image contains liquor goods. The above solution performs liquor inspection on scanned images of goods, especially containers, so as to intelligently assist the image inspectors.

公开(公告)号：US20170285218A1

公开(公告)日：2017-10-05

申请号：US15301060

申请日：2015-12-16

Applicant: TSINGHUA UNIVERSITY ,  Nuctech Company Limited

Inventor： Li ZHANG ,  Shuo WANG ,  Yunda SUN ,  Qingping HUANG

IPC: G01V5/00 ,  G06T7/90 ,  G06T7/40 ,  G06T7/50 ,  G01N23/04 ,  G06T7/00

CPC classification number: G01V5/005 ,  G01N23/04 ,  G01N23/046 ,  G06T7/0002 ,  G06T7/40 ,  G06T7/50 ,  G06T7/90 ,  G06T2207/10072

Abstract: The present disclosure provides a method and device for operating a CT-based three-dimensional image used for security inspection. The method includes: providing a CT-based three-dimensional image used for security inspection; accepting a selection of an image of an object in the three-dimensional image; and responding to the selection. The present disclosure has strong practicality, and can provide effective reference information for image judgment in the CT-based security inspection field.