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：US12188882B2

公开(公告)日：2025-01-07

申请号：US18052671

申请日：2022-11-04

Applicant: Nuctech Company Limited ,  Tsinghua University

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

IPC: G01N23/046 ,  G01N23/083 ,  G06T11/00

Abstract: The method includes: receiving an encoder signal and a ray machine output beam signal, and initially synchronizing the encoder signal and the ray machine output beam signal; recording coded value M of the encoder at moment tm, and coded value N of the encoder at moment tm+1, where M, N, and m are integers; determining that duration from the moment tm to the moment tm+1 is an actual output beam time interval T of the ray machine, when it is determined that a difference value between the coded value M and the coded value N satisfies preset value a, a being an integer; determining gap time TG in the actual output beam time interval T based on a preset output beam time interval TJ of the imaging system and the actual output beam time interval T; and controlling the ray machine not to emit beam within the gap time TG.

公开(公告)号：US20240410839A1

公开(公告)日：2024-12-12

申请号：US18699360

申请日：2022-09-29

Applicant: NUCTECH COMPANY LIMITED

Inventor： Li Zhang ,  Zhiqiang Chen ,  Ming Chang ,  Xin Jin ,  Qingping Huang ,  Mingzhi Hong ,  Liguo Zhang

IPC: G01N23/046

Abstract: A CT imaging system is provided, including: a scanning channel disposed in a first direction; a radiation source component disposed on one side of the scanning channel, wherein the radiation source component is used to emit radiation beams; a detector component disposed on another side of the scanning channel, wherein the detector component is disposed opposite to the radiation source component and used to receive the radiation beams, and the radiation beams forms an imaging region between the radiation source component and the detector component, wherein the detector component includes at least two detection regions and at least one blank region, the imaging region has a central cross-section of the radiation beams extending through the radiation source component, and a position of the detection region and a position of the blank region are complementary with respect to the central cross-section of the radiation beams.

公开(公告)号：US11768163B2

公开(公告)日：2023-09-26

申请号：US17309684

申请日：2019-09-10

Applicant: Nuctech Company Limited ,  Tsinghua University

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

IPC: G01N23/046 ,  G01V5/00

CPC classification number: G01N23/046 ,  G01V5/005 ,  G01N2223/639

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 or rows of the high-energy detectors; and each row of the low-energy detectors covers a row of high-energy detectors.

公开(公告)号：US11215570B2

公开(公告)日：2022-01-04

申请号：US16337768

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: G01N23/10 ,  G01N23/046 ,  G01V5/00 ,  G06Q50/26

Abstract: A security inspection system and method are disclosed. The security inspection system comprises: at least one baggage cart comprising at least one compartment for containing a baggage and configured to pass through a scanning channel; and a scanning device configured to inspect the baggage cart passing through the scanning channel and containing the baggage, at least based on a traveling speed of the baggage cart.