公开(公告)号：US09746579B2

公开(公告)日：2017-08-29

申请号：US14576737

申请日：2014-12-19

Applicant: Tsinghua University ,  Nuctech Company Limited

Inventor： Li Zhang ,  Zhiqiang Chen ,  Qingping Huang ,  Xin Jin ,  Yunda Sun ,  Le Shen ,  Ji Zhao

IPC: A61B6/00 ,  G01V5/00 ,  G01N23/04 ,  G01T7/08 ,  G06T11/00

CPC classification number: G01V5/005 ,  G01N23/046 ,  G01T7/08 ,  G06T11/003 ,  G06T2207/10072 ,  G06T2211/40

Abstract: A CT system and method thereof are disclosed. The system includes: a conveyor mechanism; a first scanning stage configured to scan the object and generate a first digital signal; a second scanning stage spaced from the first scanning stage at a preset distance in a direction of the object's movement; a processing device configured to reconstruct a CT image of the object at a first image quality based on the first digital signal, and analyze the CT image; and a control device configured to adjust a scanning parameter of the second scanning stage based on an analysis result of the processing device to cause the second scanning stage to output a second digital signal. The processing device reconstructs a CT image of the object at a second image quality higher than the first image quality at least based on the second digital signal. The system takes full advantage of the distributed ray sources which replace the normal slip ring technology.

公开(公告)号：US11385377B2

公开(公告)日：2022-07-12

申请号：US16627426

申请日：2019-05-29

Applicant: Nuctech Company Limited

Inventor： Hongbin Hou ,  Mingzhi Hong ,  Jinning Liang ,  Qingping Huang ,  Xin Jin

IPC: G01V5/00 ,  G21F1/12 ,  B32B1/08 ,  B32B27/12 ,  B32B27/40 ,  B32B25/02

Abstract: A shielding structure of the safety inspection equipment includes a first carbon fiber layer, a polyurethane layer and a second carbon fiber layer, which are sequentially stacked to be configured as a shielding channel with two opened ends. The second carbon fiber layer is an outer layer of the shielding channel. The first carbon fiber layer and the second carbon fiber layer are made of carbon fiber materials. The polyurethane layer is made of polyurethane materials.

公开(公告)号：US11340177B2

公开(公告)日：2022-05-24

申请号：US15733630

申请日：2020-01-20

Applicant: Nuctech Company Limited ,  Tsinghua University

Inventor： Zhiqiang Chen ,  Li Zhang ,  Zhenhua Zhao ,  Yunda Sun ,  Xin Jin ,  Wuyang Liang

IPC: G01N23/00 ,  G01D18/00 ,  G01N23/046 ,  A61B6/03 ,  A61B6/00 ,  G01V5/00 ,  G01V13/00

Abstract: Disclosed are calibration assembly and calibration method of calibrating geometric parameters of a CT apparatus. The calibration assembly includes at least one calibration unit each including a plurality of calibration wires, and the plurality of calibration wires are arranged regularly in a same plane. The calibration assembly is easy to be processed and can be used to calibrate geometric parameters of a CT apparatus, and the calibration operations are simple and easy to be implemented.

公开(公告)号：US20210323696A1

公开(公告)日：2021-10-21

申请号：US16336750

申请日：2019-01-04

Applicant: Nuctech Company Limited

Inventor： Li Zhang ,  Zhiqiang Chen ,  Qingping Huang ,  Wenyuan Bi ,  Xin Jin ,  Ming Chang ,  Mingzhi Hong ,  Yancai Wang

IPC: B64F1/36 ,  B62B5/00 ,  G01N23/04 ,  B62B3/00

Abstract: A baggage cart is disclosed. The baggage cart is used for security inspection in an airport, comprising: a cart body, comprising at least one compartment having a door; and a locking device, coupled to the compartment and configured to lock the compartment in response to receiving an indication signal.

公开(公告)号：US10379067B2

公开(公告)日：2019-08-13

申请号：US15257595

申请日：2016-09-06

Applicant: Tsinghua University ,  Nuctech Company Limited

Inventor： Zhiqiang Chen ,  Li Zhang ,  Tianyi Yang Dai ,  Ji Zhao ,  Xin Jin ,  Ming Chang

IPC: G01N23/00 ,  G01N23/046 ,  G01N23/20 ,  G21K1/02 ,  G01V5/00

Abstract: Systems and methods for liquid detection are disclosed. An illustrative method for liquid detection herein may include implementing CT imaging and XRD imaging on one or more liquid planes of liquid contained in a container at once by rotating the container so that X-rays from a same radiation source scan a whole area of each of the one or more liquid planes, and generating a substance identification result for the liquid contained in the container based on a CT image and a XRD image, wherein the CT imaging and the XRD imaging are implemented on a same liquid plane or different liquid planes. Consistent with various aspects and features, implementations may identify substances contained in the liquid more quickly and accurately.

公开(公告)号：US10338011B2

公开(公告)日：2019-07-02

申请号：US15263207

申请日：2016-09-12

Applicant: TSINGHUA UNIVERSITY ,  NUCTECH COMPANY LIMITED

Inventor： Zhiqiang Chen ,  Li Zhang ,  Tianyi Yang Dai ,  Qingping Huang ,  Yunda Sun ,  Xin Jin

IPC: G01N23/046 ,  G01N23/083 ,  G01N23/207 ,  G21K1/02 ,  G01N23/20 ,  G01V5/00

Abstract: The present disclosure relates to multi-modality detection systems and methods. One illustrative multi-modality detection system may include a distributed radiation source configured to irradiate an object under detection, a primary collimator configured to separate rays of the distributed radiation source into two parts, wherein one part is for CT detection and the other part is for XRD detection, a CT detection device configured to perform a CT detection to acquire a CT image of the object under detection, and an XRD detection device configured to perform an XRD detection to acquire an XRD image of the object under detection, wherein the CT detection and the XRD detection are performed simultaneously.

公开(公告)号：US11906447B2

公开(公告)日：2024-02-20

申请号：US17471725

申请日：2021-09-10

Applicant: NUCTECH COMPANY LIMITED ,  Tsinghua University

Inventor： Zhiqiang Chen ,  Li Zhang ,  Xiaofei Xu ,  Le Shen ,  Ming Chang ,  Hu Tang ,  Xin Jin ,  Yunda Sun

IPC: G01N23/046 ,  G01N23/083 ,  G01N23/10 ,  G01V5/00

CPC classification number: G01N23/10 ,  G01N23/046 ,  G01N23/083 ,  G01N2223/1016 ,  G01N2223/204 ,  G01N2223/3301 ,  G01N2223/335 ,  G01N2223/3307 ,  G01N2223/3308 ,  G01N2223/419 ,  G01N2223/639 ,  G01N2223/643 ,  G01V5/005

Abstract: A multi-channel static CT device is provided, and the multi-channel static CT device includes: a scanning channel including a plurality of scanning sub-channels; a distributed X-ray source including a plurality of ray emission points arranged around the scanning channel; and a detector module including a plurality of detectors arranged around the scanning channel, wherein the plurality of detectors are arranged corresponding to the plurality of ray emission points.

公开(公告)号：US11479369B2

公开(公告)日：2022-10-25

申请号：US16336750

申请日：2019-01-04

Applicant: Nuctech Company Limited

Inventor： Li Zhang ,  Zhiqiang Chen ,  Qingping Huang ,  Wenyuan Bi ,  Xin Jin ,  Ming Chang ,  Mingzhi Hong ,  Yancai Wang

IPC: B62B3/00 ,  G01N23/04 ,  B64F1/36 ,  B62B5/00

Abstract: A baggage cart is disclosed. The baggage cart is used for security inspection in an airport, comprising: a cart body, comprising at least one compartment having a door; and a locking device, coupled to the compartment and configured to lock the compartment in response to receiving an indication signal.

公开(公告)号：US10955572B2

公开(公告)日：2021-03-23

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 ,  G01T1/36

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：US09805504B2

公开(公告)日：2017-10-31

申请号：US14711949

申请日：2015-05-14

Applicant: Nuctech Company Limited

Inventor： Li Zhang ,  Zhiqiang Chen ,  Qingping Huang ,  Yunda Sun ,  Zhi Tang ,  Le Shen ,  Hu Tang ,  Qianlu Ren ,  Xin Jin

IPC: H05G1/64 ,  G06T17/00 ,  A61B6/03 ,  A61B6/00 ,  G06T19/00 ,  G06T11/00 ,  G01N23/04

CPC classification number: G06T17/00 ,  A61B6/032 ,  A61B6/463 ,  A61B6/466 ,  A61B6/5205 ,  A61B6/5223 ,  G01N23/046 ,  G06T11/003 ,  G06T19/003 ,  G06T2207/10081 ,  G06T2207/10124 ,  G06T2207/30004 ,  G06T2207/30196 ,  G06T2210/41 ,  G06T2211/436 ,  G06T2219/016 ,  G06T2219/028 ,  G06T2219/2004

Abstract: The present disclosure discloses an image display method in a CT system. The method comprises: implementing CT scanning on an inspected object, to obtain CT projection data; organizing the CT projection data according to a predetermined interval; extracting basic data from the organized CT projection data by using a fixed angle as a start angle and using 360 degrees as an interval; forming a DR image based on the extracted basic data; reconstructing a three-dimensional image of the inspected object from the CT projection data; and displaying the DR image and the reconstructed three-dimensional image on a screen at the same time. In the solution, the CT data is processed to obtain DR data. After the DR data is obtained, a DR image is obtained directly using a DR data processing algorithm. This enables an image recognizer to more accurately and more rapidly inspect goods carried by a passenger using the existing experience in image recognition of the DR image.