公开(公告)号：US20170176352A1

公开(公告)日：2017-06-22

申请号：US15262894

申请日：2016-09-12

Applicant: TSINGHUA UNIVERSITY ,  NUCTECH COMPANY LIMITED

Inventor： Zhiqiang CHEN ,  Li ZHANG ,  Tianyi YANG DAI ,  Ji ZHAO ,  Xin JIN ,  Ming CHANG

IPC: G01N23/04 ,  G01N23/207 ,  G21K1/02 ,  G01N23/083

CPC classification number: G01N23/046 ,  G01N23/083 ,  G01N23/20083 ,  G01N23/207 ,  G01N2223/045 ,  G01N2223/056 ,  G01N2223/316 ,  G01N2223/643 ,  G01V5/0025 ,  G01V5/005 ,  G21K1/02

Abstract: The present disclosure relates to detection systems and methods. One illustrative detection system may include a distributed radiation source having a plurality of radiation source focus points, which irradiate an object under detection, wherein the plurality of radiation source focus points are divided into a certain number of groups, and a primary collimator that limits rays of each of the radiation source focus points such that the rays emit into an XRD detection device. An XRD detection device may include a plurality of XRD detectors that are divided into the same number of groups as the radiation source focus points, wherein XRD detectors in a same group are arranged to be separated by XRD detectors in other groups, and rays of each of the radiation source focus points are received by XRD detectors having the same group number as the group number of the radiation source focus point.

公开(公告)号：US20170122884A1

公开(公告)日：2017-05-04

申请号：US15301345

申请日：2015-12-14

Applicant: NUCTECH COMPANY LIMITED

Inventor： Li ZHANG ,  Xin JIN ,  Huaping TANG ,  Qingping HUANG ,  Yunda SUN ,  Zhiqiang CHEN

IPC: G01N23/04

CPC classification number: G01N23/04 ,  G01N23/046 ,  G01N2223/3307 ,  G01N2223/423 ,  G01N2223/643 ,  G01V5/0041

Abstract: The present disclosure discloses a radiography system including: a ray source, comprising a plurality of X-ray generators which are distributed on one or more planes intersected with a moving direction of an object being inspected; a detector module comprising a plurality of detection units; a data collection circuit; a controller, configured to control at least two X-ray generators of the plurality of X-ray generators in the ray source to generate X-rays alternately such that the object is scanned by the generated X-rays; and control the detector module and the data collection circuit to respectively obtain detection data corresponding to the at least two X-ray generators; and a data processing computer, configured to create images of the object being inspected in view angles of the at least two X-ray generators based on the detection data. The above embodiments may implement a multi-view-angle perspective imaging system within a single scan plane by utilizing a distributed X-ray source and reuse of the detectors.

公开(公告)号：US20250095240A1

公开(公告)日：2025-03-20

申请号：US18570387

申请日：2023-08-31

Applicant: NUCTECH COMPANY LIMITED ,  TSINGHUA UNIVERSITY

Inventor： Zhiqiang CHEN ,  Li ZHANG ,  Hu TANG ,  Yunda SUN ,  Xin JIN ,  Zhenhua ZHAO ,  Le SHEN

IPC: G06T11/00 ,  A61B6/00 ,  G06T5/50 ,  G06T7/11

Abstract: A static CT apparatus and an imaging method for the same are provided. The imaging method includes: acquiring initial projection data of an inspected object at different angles by using a distributed ray source and a detector, where the initial projection data includes projection data that is directly obtained by the detector based on the rays emitted from a plurality of ray source points; obtaining a first CT image using a reconstruction algorithm according to the acquired initial projection data; dividing the first CT image into N first sub-images, where N is a positive integer greater than or equal to 1, and a union of the N first sub-images covers the entire first CT image; optimizing the N first sub-images to obtain N second sub-images; and merging the N second sub-images to obtain a second CT image.

公开(公告)号：US20250045984A1

公开(公告)日：2025-02-06

申请号：US18722485

申请日：2022-10-24

Applicant: NUCTECH COMPANY LIMITED ,  Tsinghua University

Inventor： Li ZHANG ,  Zhiqiang CHEN ,  Yunda SUN ,  Xinbin LI ,  Zhenhua ZHAO ,  Tiao ZHAO ,  Xin JIN

IPC: G06T11/00 ,  G01N23/046

Abstract: A calibration assembly, including: a base; and a plurality of calibration wires dispersedly connected to the base. An absorption capacity of the calibration wire for X rays is greater than that of the base for X rays. Through a specific structure design of a plurality of calibration wires in the calibration assembly, the calibration wires are dispersedly connected to the base, and taking advantage of the characteristics that the absorption capacity of the calibration wire for X rays is greater than that of the base for X rays, the calibration wires are applied to the calibration phantom, and the calibration phantom is scanned in the scanning system. By continuously adjusting the geometric parameter values in the imaging method, the optimal geometric parameter values that are closest to the real scanning system structure may be obtained, thereby improving the imaging effect of the scanning system.

公开(公告)号：US20240410838A1

公开(公告)日：2024-12-12

申请号：US18698356

申请日：2022-09-29

Applicant: NUCTECH COMPANY LIMITED

Inventor： Zhiqiang CHEN ,  Li ZHANG ,  Qingping HUANG ,  Xin JIN ,  Ming CHANG ,  Mingzhi HONG ,  Liguo ZHANG

IPC: G01N23/046

Abstract: An inspection device includes: an inspection channel, through which the object enters and exits the inspection device; an imaging system, including a radiation source used to generate a ray, the radiation source is disposed on one side of the inspection channel, and the ray at least forms a main beam surface applicable to scan and inspect the object; and a detector used to receive the ray passing through the object, the detector is disposed on the other side of the inspection channel to form an inspection region between the radiation source and the detector; and a posture adjustment structure disposed in the inspection region and used to adjust a posture of the object in the inspection region. The object has an inspection surface. The posture adjustment structure may adjust the posture of the object, so that the inspection surface and the main beam surface are in the same plane.

公开(公告)号：US20240377553A1

公开(公告)日：2024-11-14

申请号：US18574638

申请日：2022-07-06

Applicant: Tsinghua University ,  Nuctech Company Limited

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

IPC: G01V5/226

Abstract: Provided are an inspection method, and an inspection system including: at least one ray source; a detector assembly and a conveying device. At least one ray source and the detector assembly may move in a traveling direction relative to the conveying device, so that the to-be-inspected object may enter an inspection region. When viewed along a central axis of the inspection region, at least one ray source may translate between scanning positions, and a translation distance of at least one ray source between two adjacent scanning positions is greater than a spacing between adjacent target spots of each ray source. When at least one ray source is located at one scanning position, at least one ray source and the detector assembly move in the traveling direction and at least one ray source emits X-rays. After moving a predetermined distance, at least one ray source translates to another scanning position.

公开(公告)号：US20240104884A1

公开(公告)日：2024-03-28

申请号：US18013104

申请日：2022-10-08

Applicant: NUCTECH COMPANY LIMITED

Inventor： Li ZHANG ,  Zhiqiang CHEN ,  Ming CHANG ,  Xin JIN ,  Qingping HUANG ,  Xiaofei XU ,  Mingzhi HONG ,  Liguo ZHANG

IPC: G06V10/44 ,  G01N23/04 ,  G06T7/50 ,  G06T7/62 ,  G06T7/70

CPC classification number: G06V10/44 ,  G01N23/04 ,  G06T7/50 ,  G06T7/62 ,  G06T7/70 ,  G06V2201/07

Abstract: A method of acquiring feature information of a detected object is provided, including: controlling the detected object to pass through a detection apparatus; controlling an imaging system to perform radiation scanning on the detected object acquiring a radiation scanning image of the detected object acquiring feature information of the detected object through the radiation scanning image. The detected object includes a first part, a detection part and a second part sequentially in a first direction. The acquiring feature information of the detected object through the radiation scanning image includes: acquiring a first boundary line between the detection part and the first part and a second boundary line between the detection part and the second part through the radiation scanning image; and calculating a dimension between the first boundary line and the second boundary line in the first direction to acquire a dimension of the detection part in the first direction.

公开(公告)号：US20230144259A1

公开(公告)日：2023-05-11

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 ,  G06T11/00 ,  G01N23/083

CPC classification number: G01N23/046 ,  G06T11/005 ,  G01N23/083 ,  G01N2223/643 ,  G01N2223/04 ,  G01N2223/419

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：US20210333430A1

公开(公告)日：2021-10-28

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

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：US20170227476A1

公开(公告)日：2017-08-10

申请号：US15328437

申请日：2015-11-02

Applicant: Tsinghua University ,  Nuctech Company Limited

Inventor： Li Zhang ,  Zhiqiang CHEN ,  Xiaolei JIANG ,  Xiaohua ZHU ,  Xin JIN

IPC: G01N23/04

CPC classification number: G01N23/046 ,  G01N23/04 ,  G01N2223/3306 ,  G01N2223/401 ,  G01N2223/408 ,  G21K2207/005

Abstract: The present disclosure relates to X-ray imaging systems and methods. An exemplary system may comprise a distributed X-ray source arrangement, a fixed grating module, an X-ray detecting device, and a computer workstation. In one illustrative implementation, X-ray sources of the distributed incoherent X-ray source arrangement may sequentially generate and emit X-rays to an object to be detected. Further, for each exposure, the X-ray detecting device may receive the X-rays, wherein after a series of stepping exposures and corresponding data acquisitions, at each pixel of the X-ray detecting device, X-ray intensities are represented as an intensity curve; the intensity curve may be compared to an intensity curve in the absence of the object to be detected, and a pixel value at each pixel may be obtained from a variation of the intensity curves; and image information of the object to be detected may be obtained according to such pixel values.