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：US20240203126A1

公开(公告)日：2024-06-20

申请号：US18530332

申请日：2023-12-06

Applicant: NUCTECH COMPANY LIMITED ,  NUCTECH JIANGSU COMPANY LIMITED ,  TSINGHUA UNIVERSITY

Inventor： Zhiqiang CHEN ,  Li ZHANG ,  Hu TANG ,  Yunda SUN ,  Dong LI ,  Dan YAN ,  Yueyi LIU

IPC: G06V20/52 ,  G06V20/64

CPC classification number: G06V20/52 ,  G06V20/64 ,  G06V2201/07

Abstract: An intelligent passenger inspection channel system and method are provided. The system includes: a passenger entrance device; a first camera, provided at the passenger entrance device for capturing a first image of a number of passengers going to pass through the device; a luggage inspection device; a second camera, provided at an entrance of the luggage inspection device for capturing a second image of a luggage entering the entrance and a corresponding passenger; a third camera, provided at an exit of the luggage inspection device for capturing a third image of a luggage leaving the exit and a corresponding passenger; a personnel security inspection device; a fifth camera, provided at the personnel security inspection device for capturing a fifth image of an inspector's inspection behavior; and a sixth camera, provided in a passenger inspection channel for capturing a sixth image of an entire travel of a passenger within the channel.

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：US20170176353A1

公开(公告)日：2017-06-22

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

CPC classification number: G01N23/046 ,  G01N23/083 ,  G01N23/20083 ,  G01N23/207 ,  G01N2223/056 ,  G01N2223/316 ,  G01N2223/419 ,  G01N2223/643 ,  G01V5/005 ,  G21K1/02

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：US20160012647A1

公开(公告)日：2016-01-14

申请号：US14748383

申请日：2015-06-24

Applicant: Nuctech Company Limited

Inventor： Zhiqiang CHEN ,  Li ZHANG ,  Shuo WANG ,  Yunda SUN ,  Qingping HUANG ,  Zhi TANG

IPC: G06T19/20 ,  G06T15/00 ,  G06T15/20 ,  G06T11/20 ,  G06T7/60 ,  G06T7/00 ,  G06K9/62 ,  G06K9/46 ,  G06K9/52

CPC classification number: G06T11/20 ,  G01V5/0008 ,  G01V5/005 ,  G06K9/46 ,  G06K9/52 ,  G06K9/6218 ,  G06K2009/4666 ,  G06T7/50 ,  G06T7/60 ,  G06T7/75 ,  G06T15/005 ,  G06T15/20 ,  G06T19/20

Abstract: A CT system for security check and a method thereof are provided. The method includes: reading inspection data of an inspected object; inserting at least one three-dimensional (3D) Fictional Threat Image (FTI) into a 3D inspection image of the inspected object, which is obtained from the inspection data; receiving a selection of at least one region in the 3D inspection image including the 3D FTI or at least one region in a two-dimensional (2D) inspection image including a 2D FTI corresponding to the 3D FTI, wherein the 2D inspection image is obtained from the 3D inspection image or is obtained from the inspection data; and providing a feedback of the 3D inspection image including at least one 3D FTI in response to the selection. With the above solution, it is convenient for a user to rapidly mark a suspected object in the CT image, and provides a feedback of whether a FTI is included.

Abstract translation: 提供了一种用于安全检查的CT系统及其方法。 该方法包括：读取检查对象的检查数据; 将至少一个三维（3D）虚构威胁图像（FTI）插入到从检查数据获得的被检查对象的3D检查图像中; 在包括3D FTI的3D检查图像中的至少一个区域的选择或者包括对应于3D FTI的2D FTI的二维（2D）检查图像中的至少一个区域，其中2D检查图像从 3D检查图像或从检查数据获得; 以及响应于所述选择提供包括至少一个3D FTI的3D检查图像的反馈。 利用上述解决方案，用户可以快速地标记CT图像中的可疑对象，并提供是否包括FTI的反馈。

公开(公告)号：US20150379745A1

公开(公告)日：2015-12-31

申请号：US14751044

申请日：2015-06-25

Applicant: TSINGHUA UNIVERSITY ,  NUCTECH COMPANY LIMITED

Inventor： Li ZHANG ,  Xin JIN ,  Qingping HUANG ,  Yunda SUN

IPC: G06T11/00 ,  G01N23/04 ,  G01V5/00

CPC classification number: G06T11/003 ,  A61B6/032 ,  A61B6/5205 ,  A61B6/583 ,  G01N23/046 ,  G01V5/0041 ,  G01V5/005 ,  G06T2207/10081

Abstract: The present invention provides a CT image calibration method and device and a CT system. The method includes: arranging a fixed calibration element at the outside of a channel area and within the maximal reconstruction area of a CT scanning device, and storing the theoretical value of the fixed calibration element; collecting the projection data of the fixed calibration element to obtain the actual reconstructed image of the fixed calibration element; and comparing the actual reconstructed image with the stored corresponding theoretical value, to establish a mapping function for correcting the actual reconstructed image into the theoretical value. By adopting the present invention, the calibration quality can be effectively improved, the image calibration effect is enhanced, the reliability of the CT scanning device is improved and the maintenance cost is saved, thus the practical application value is very high.

Abstract translation: 本发明提供一种CT图像校准方法和装置以及CT系统。 该方法包括：在CT扫描装置的通道区域的外侧和最大重建区域内设置固定校准元件，并存储固定校准元件的理论值; 收集固定校准元件的投影数据，以获得固定校准元件的实际重建图像; 并将实际重构图像与存储的对应理论值进行比较，以建立用于将实际重建图像校正为理论值的映射函数。 通过采用本发明，可以有效地提高校准质量，提高图像校正效果，提高CT扫描装置的可靠性，节省维护成本，实际应用价值非常高。

公开(公告)号：US20150185355A1

公开(公告)日：2015-07-02

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: G01V5/00 ,  G01T7/08 ,  G01N23/04 ,  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 discloses. 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.

Abstract translation: 公开了一种CT系统及其方法。 该系统包括：输送机构; 第一扫描台，被配置为扫描所述物体并产生第一数字信号; 第二扫描台，在所述物体运动的方向上以预定的距离与所述第一扫描台隔开; 处理装置，被配置为基于所述第一数字信号以第一图像质量重建所述对象的CT图像，并分析所述CT图像; 以及控制装置，其被配置为基于所述处理装置的分析结果来调整所述第二扫描级的扫描参数，以使所述第二扫描级输出第二数字信号。 处理装置至少基于第二数字信号，以比第一图像质量高的第二图像质量重构对象的CT图像。 该系统充分利用了代替普通滑环技术的分布式射线源。