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。

公开(公告)号：US20150199804A1

公开(公告)日：2015-07-16

申请号：US14576705

申请日：2014-12-19

Applicant: Tsinghua University ,  Nuctech Company Limited

Inventor： Zhiqiang CHEN ,  Li ZHANG ,  Ji ZHAO ,  Qingping HUANG ,  Xin JIN

IPC: G06T7/00

CPC classification number: G06T7/0002 ,  G01V5/005 ,  G06T2207/30112

Abstract: A CT system and method thereof are discloses. The system includes: a fixed multi-plane multi-source X-ray generation device and a control system thereof that provide X-ray source used in luggage inspection; a single-energy, pseudo-dual-energy or spectral detector system and data transfer system that receive perspective data of X ray penetrating the luggage, and transfer the data to a computer for processing; a conveyor and a control system thereof that control a speed for moving the luggage forth and back, and perform tomogram scanning; and a host computer system that performs tomogram reconstruction and provides man-machine interaction. The system takes full advantage of characteristics, such as high speed and stability, brought by the distributed ray sources which replace the normal slip ring technology. The system also adopts the idea of inverse-geometry CT, and reduces detector area and cost by increasing the number of ray sources. With the reduction of detector area, cone-beam artifacts and cup-shape artifacts caused by scattering are also reduced, and influence of the oblique effect on registration of dual-energy data is suppressed.

Abstract translation: 公开了一种CT系统及其方法。 该系统包括：提供行李检查中使用的X射线源的固定多平面多源X射线产生装置及其控制系统; 单能量，伪双能量或光谱检测器系统和数据传输系统，其接收穿透行李的X射线的透视数据，并将数据传送到计算机进行处理; 输送机及其控制系统，其控制行李前后移动的速度，并执行断层图像扫描; 以及执行断层图像重建并提供人机交互的主计算机系统。 系统充分利用了代替普通滑环技术的分布式射线源带来的高速度，稳定性等特点。 该系统还采用反几何CT的思想，通过增加射线源数量，减少探测器面积和成本。 随着检测器面积的减小，散射引起的锥束伪影和杯形伪影也减少，并且斜率对双能数据配准的影响受到抑制。

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：US20230350053A1

公开(公告)日：2023-11-02

申请号：US18139411

申请日：2023-04-26

Applicant: NUCTECH COMPANY LIMITED ,  Tsinghua University

Inventor： Zhiqiang CHEN ,  Li ZHANG ,  Ao ZHENG ,  Ji ZHAO ,  Hu TANG ,  Lei LEI ,  Shuo WANG ,  Yunda SUN

IPC: G01S13/88 ,  G06T5/50 ,  G06T7/62 ,  G06T7/70 ,  G06V10/74 ,  G06V20/70

CPC classification number: G01S13/887 ,  G06T5/50 ,  G06T7/62 ,  G06T7/70 ,  G06V10/761 ,  G06V20/70 ,  G06V2201/07 ,  G06T2207/20081 ,  G06T2207/20104 ,  G06T2207/20221

Abstract: Provided are a method and an apparatus of training a radiation image recognition model online and a method and an apparatus of recognizing a radiation image. Preset data is pre-stored in a radiation inspection system, and the preset data includes a first radiation image. The method of training radiation image recognition model online includes: collecting a second radiation image at the radiation inspection site; labeling the second radiation image online to form on-site collected data having a second labeling information, wherein the second labeling information is an incomplete labeling information of the second radiation image, and the second labeling information is used to indicate at least one of objects of interest in the second radiation image; synthesizing the preset data and the on-site collected data online to form a training data set; and training the radiation image recognition model online using the training data set.

公开(公告)号：US20170176351A1

公开(公告)日：2017-06-22

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: G01N23/04 ,  G01N23/20 ,  G21K1/02

CPC classification number: G01N23/046 ,  G01N23/20 ,  G01N23/20083 ,  G01N2223/056 ,  G01N2223/316 ,  G01N2223/419 ,  G01N2223/637 ,  G01V5/0016 ,  G01V5/005 ,  G21K1/02

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：US20150185357A1

公开(公告)日：2015-07-02

申请号：US14577069

申请日：2014-12-19

Applicant: Tsinghua University ,  Nuctech Company Limited

Inventor： Zhiqiang CHEN ,  Li ZHANG ,  Qingping HUANG ,  Yunda SUN ,  Xin JIN ,  Tao YANG ,  Le SHEN ,  Ji ZHAO

IPC: G01V5/00 ,  G01N23/04

CPC classification number: G01V5/0041 ,  G01N23/046 ,  G01T1/2985 ,  G01V5/005

Abstract: Multi-spectral static CT apparatuses are disclosed. The apparatus includes a ray source in a form of multiple distributed spots, multiple columns of detectors, a data acquisition device, an article carrying and control device, and a multi-spectral projection data processing device. An object of the present disclosure is to combine static CT scanning technology with multi-spectral analysis technology. It has an advantage of a static CT system, such as high scanning speed, simple mechanic structure, and/or cost reduction due to omission of slip ring. It also can perform identification of material in an article, and can be widely applied in occasions such as safety inspection, and smuggling suppression at customs.

Abstract translation: 公开了多光谱静态CT装置。 该装置包括多个分布点的形式的射线源，多列检测器，数据采集装置，物品携带和控制装置以及多光谱投影数据处理装置。 本公开的目的是将静态CT扫描技术与多光谱分析技术相结合。 它具有静电CT系统的优点，如扫描速度快，机械结构简单，和/或由于省略滑环而降低成本。 也可以在物品中进行材料鉴定，并可广泛应用于安全检查，海关走私等场合。