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：US20170024862A1

公开(公告)日：2017-01-26

申请号：US15217613

申请日：2016-07-22

Applicant: Tsinghua University ,  Nuctech Company Limited

Inventor： Kejun KANG ,  Zhiqiang CHEN ,  Yuanjing LI ,  Li ZHANG ,  Ziran ZHAO ,  Yaohong LIU ,  Jianping GU ,  Zhiming WANG

IPC: G06T5/00 ,  G06T7/40 ,  G06T7/00

CPC classification number: G06T5/003 ,  G06T7/00 ,  G06T2207/10116 ,  G06T2207/20021 ,  G06T2207/20076 ,  G06T2207/30168

Abstract: The present disclosure relates to a method and device for estimating a point spread function. In one implementation, a method includes capturing, by a scanning device, an image by scanning a plurality of rectangle blocks which are same sized and closely arranged, wherein the plurality of rectangle blocks are made of different materials and/or have different mass thicknesses, and an incident direction of rays is perpendicular to a scanning direction and a surface of the plurality of rectangle blocks arranged closely during scanning; obtaining line spread functions for two directions along a length side and a width side of each of the rectangle blocks based on the scanned image, and obtaining standard deviation parameters of the line spread functions; and combining the standard deviation parameters for the two directions to obtain a two dimensional Point Spread Function (PSF) parameter so as to estimate the point spread function.

Abstract translation: 本公开涉及一种用于估计点扩散函数的方法和装置。 在一个实现中，一种方法包括通过扫描与尺寸相同并且紧密排列的多个矩形块来扫描图像，其中多个矩形块由不同的材料制成和/或具有不同的质量厚度， 并且光线的入射方向垂直于扫描方向，并且所述多个矩形块的表面在扫描期间被紧密排列; 基于扫描图像，沿矩形块的长度侧和宽度侧的两个方向获得线扩展函数，并获得线扩展函数的标准偏差参数; 并组合两个方向的标准偏差参数以获得二维点扩展函数（PSF）参数，以估计点扩散函数。

公开(公告)号：US20170023697A1

公开(公告)日：2017-01-26

申请号：US15217787

申请日：2016-07-22

Applicant: Tsinghua University ,  NUCTECH COMPANY LIMITED

Inventor： Zhiqiang CHEN ,  Yuanjing LI ,  Li ZHANG ,  Ziran ZHAO ,  Yaohong LIU ,  Juan ZHENG ,  Jianping GU ,  Chunguang ZONG

IPC: G01V5/00

CPC classification number: G01V5/0041 ,  G01N23/04 ,  G01N23/046 ,  G01N23/06 ,  G01N23/083 ,  G01N23/087 ,  G01N23/10 ,  G01V5/0016 ,  G01V5/005 ,  G01V5/12

Abstract: Disclosed is a method and device for estimating weight of an object to be inspected in an inspection system. An effective atomic number and a high-energy gray value of the dual-energy corresponding to each pixel of the object to be inspected are obtained by a dual-energy radiation scanning. A mass-thickness value for a corresponding pixel is obtained from a pre-created mass-thickness attenuation curve by utilizing the effective atomic numbers and the high-energy gray value of the dual-energy for respective pixels. Weight information for at least a part of the object to be inspected is calculated by multiplying the mass-thickness value by the area of the pixel. Such a method may accurately calculate the weight of the object to be inspected and save the cost for a conventional weighing hardware.

Abstract translation: 公开了一种用于在检查系统中估计被检查物体的重量的方法和装置。 通过双能量辐射扫描获得与待检测对象的每个像素相对应的双能量的有效原子序数和高能灰度值。 通过利用有效原子序数和相应像素的双能量的高能量灰度值，从预先创建的质量厚度衰减曲线获得相应像素的质量厚度值。 通过将质量厚度值乘以像素的面积来计算待检查对象的至少一部分的重量信息。 这种方法可以精确地计算待检查物体的重量并节省常规称重硬件的成本。

公开(公告)号：US20170017667A1

公开(公告)日：2017-01-19

申请号：US15282134

申请日：2016-09-30

Applicant: Tsinghua University ,  Nuctech Company Limited

Inventor： Zhiqiang Chen ,  Li ZHANG ,  Ziran ZHAO ,  Yaohong LIU ,  Jianping GU ,  Zheng HU ,  Qiang LI

IPC: G06F17/30 ,  G06T7/00 ,  G01N23/04

CPC classification number: G06F17/30256 ,  G01N23/04 ,  G01N2223/401 ,  G01N2223/631 ,  G01V5/0016 ,  G06F17/30274 ,  G06K9/42 ,  G06K9/6215 ,  G06K2209/09 ,  G06K2209/23 ,  G06T7/001 ,  G06T7/337 ,  G06T2207/10116 ,  G06T2207/30268

Abstract: A vehicle inspection method and system are disclosed. In one aspect, the method includes acquiring a transmission image of an inspected vehicle. The method further includes acquiring a transmission image template of a vehicle model corresponding to the model of the inspected vehicle from a database. The method further includes performing registration on the transmission image of the inspected vehicle and the transmission image template. The method further includes determining a difference between a transmission image after the registration and a transmission image template after the registration, to obtain a difference area of the transmission image of the vehicle relative to the transmission image template. The method further includes processing the difference area to determine whether the vehicle carries a suspicious object or not. In some embodiments, this solution can avoid the problems of a detection loophole and a poor effect of manually determining an image in a conventional manner, and is important to assist the security inspection for small vehicles.

Abstract translation: 公开了车辆检验方法和系统。 一方面，该方法包括获取被检查车辆的发送图像。 该方法还包括从数据库中获取与被检查车辆的模型相对应的车辆模型的发送图像模板。 该方法还包括对被检查车辆的发送图像和发送图像模板进行登记。 该方法还包括确定注册之后的发送图像与注册后的发送图像模板之间的差异，以获得相对于发送图像模板的车辆的发送图像的差分区域。 该方法还包括处理差异区域以确定车辆是否携带可疑物体。 在一些实施例中，该解决方案可以避免检测漏洞的问题和以常规方式手动确定图像的差的影响，并且对于帮助小型车辆的安全检查是重要的。

公开(公告)号：US20160084775A1

公开(公告)日：2016-03-24

申请号：US14837205

申请日：2015-08-27

Applicant: Tsinghua University ,  Nuctech Company Limited

Inventor： Kejun KANG ,  Zhiqiang CHEN ,  Yuanjing LI ,  Li ZHANG ,  Ziran ZHAO ,  Yaohong LIU ,  Jianping GU ,  Liang LI ,  Yuxiang XING

IPC: G01N23/04

CPC classification number: G01N23/046 ,  G01V5/005

Abstract: The present disclosure provides a low-angle self-swinging type computed tomography (CT) apparatus, which is provided with an X-ray accelerator and a plurality of rows of detectors and is configured to include a slip ring, such that the slip ring with the accelerator and the detectors thereon is capable of performing a single-pendulum reciprocating movement while an objected to be inspected passes through the slip ring, a three dimension CT image of the object is displayed, thereby achieving accurate inspection for large-scale objects, such as van containers.

Abstract translation: 本公开提供了一种低角度自摆式计算机断层摄影（CT）装置，其设置有X射线加速器和多排检测器，并且构造成包括滑环，使得滑环具有 加速器和其上的检测器能够在被检查对象通过滑环的同时执行单摆往复运动，显示对象的三维CT图像，从而实现对大型物体的精确检查，例如 作为集装箱。

公开(公告)号：US20150206326A1

公开(公告)日：2015-07-23

申请号：US14540413

申请日：2014-11-13

Applicant: Tsinghua University ,  Nuctech Company Limited

Inventor： Ziran ZHAO ,  Li ZHANG ,  Zhiqiang CHEN ,  Shuo WANG ,  Jianping GU ,  Yunda SUN

IPC: G06T11/00 ,  G06T15/06 ,  G06T15/04 ,  G06T15/80 ,  G06T7/00 ,  G06T15/08 ,  G06T15/40 ,  G06T3/40 ,  G06T15/20 ,  G06T1/20 ,  G06T1/00 ,  G06T15/60

CPC classification number: G06T1/0007 ,  G06T1/20 ,  G06T3/403 ,  G06T11/001 ,  G06T11/008 ,  G06T15/04 ,  G06T15/06 ,  G06T15/08 ,  G06T15/205 ,  G06T15/405 ,  G06T15/60 ,  G06T15/80 ,  G06T2200/04 ,  G06T2200/08 ,  G06T2200/28 ,  G06T2207/10072 ,  G06T2207/10081 ,  G06T2210/04 ,  G06T2215/12 ,  G06T2219/2008

Abstract: The present disclosure provides a method for rendering of CT image data. The method includes acquiring 2D image data of a background and 2D image data of a target; rendering the 2D image data of the target into a 3D image of the target to obtain a first hit position of a ray; rendering the 2D image data of the background into a 3D image of the background; adjusting the 3D image of the background based on the first hit position; and synthetically rendering the 3D image of the background and the 3D image of the target. The present disclosure also provides apparatus for implementing the method.

Abstract translation: 本公开提供了一种用于呈现CT图像数据的方法。 该方法包括获取背景的2D图像数据和目标的2D图像数据; 将目标的2D图像数据呈现为目标的3D图像，以获得射线的第一命中位置; 将背景的2D图像数据呈现为背景的3D图像; 基于第一命中位置调整背景的3D图像; 并综合渲染背景的3D图像和目标的3D图像。 本公开还提供了用于实现该方法的装置。

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。

公开(公告)号：US20150048253A1

公开(公告)日：2015-02-19

申请号：US14247803

申请日：2014-04-08

Applicant: Nuctech Company Limited

Inventor： Wanlong WU ,  Zhiqiang CHEN ,  Yuanjing LI ,  Ziran ZHAO ,  Zongjun SHEN ,  Li ZHANG ,  Bin SANG ,  Chenguang ZHU

IPC: G01S13/89

CPC classification number: G01S13/89 ,  G01S13/887 ,  G01V8/005

Abstract: The present invention discloses a millimetre wave three dimensional holographic scan imaging apparatus and a method for inspecting a human body or an article. The apparatus comprises a first millimetre wave transceiver module, a second millimetre wave transceiver module, a first guide rail device to which the first millimetre wave transceiver module is connected in slidable form, a second guide rail device to which the second millimetre wave transceiver module is connected in slidable form, a driver configured to drive the first/second millimetre wave transceiver module to move along the first/second guide rail device, and a constrainer configured to constrain kinematic relation between the first and the second millimetre wave transceiver modules such that they only move in directions opposed to each other. They may increase scan speeds, improve scan stability, reduce scan operations and enhance the reliability of the apparatus.

Abstract translation: 本发明公开了一种毫米波三维全息扫描成像装置和用于检查人体或物品的方法。 该装置包括第一毫米波收发器模块，第二毫米波收发器模块，第一毫米波收发器模块以可滑动的形式连接的第一导轨装置，第二毫米波收发器模块所在的第二导轨装置 以可滑动形式连接的驱动器，被配置为驱动第一/第二毫米波收发器模块沿着第一/第二导轨装置移动的驱动器;以及约束器，其被配置为约束第一和第二毫米波收发器模块之间的运动关系，使得它们 只能相互相反的方向移动。 它们可能会增加扫描速度，提高扫描稳定性，减少扫描操作并提高设备的可靠性。

公开(公告)号：US20150048251A1

公开(公告)日：2015-02-19

申请号：US14247837

申请日：2014-04-08

Applicant: Nuctech Company Limited

Inventor： Zhiqiang CHEN ,  Yuanjing LI ,  Ziran ZHAO ,  Wanlong WU ,  Xilei LUO ,  Yinong LIU ,  Li ZHANG ,  Bin SANG ,  Zongjun SHEN ,  Yingkang JIN ,  Zhimin ZHENG

IPC: G01V8/20 ,  G01V8/26

CPC classification number: G01V8/20 ,  G01N22/00 ,  G01V8/005 ,  G01V8/26

Abstract: The present invention discloses a millimeter wave holographic scan imaging apparatus for inspecting a human body. The apparatus includes a first millimeter wave transceiver device (40) comprising a first millimeter wave transceiver antenna array (41) for transmitting and receiving a first millimeter wave signal; a second millimeter wave transceiver device (40′), which comprises a second millimeter wave transceiver antenna array (41′) for transmitting and receiving a second millimeter wave signal, and is configured in opposite direction with relation to the first millimeter wave transceiver device; a connection member (26, 27) for connecting the first millimeter wave transceiver device (40) to the second millimeter wave transceiver device (40′); and a drive device (50), which drives one of the first and the second millimeter wave transceiver devices such that the first millimeter wave transceiver device (40) and the second millimeter wave transceiver device (40′) move in opposite directions.

Abstract translation: 本发明公开了一种用于检查人体的毫米波全息扫描成像装置。 该装置包括第一毫米波收发器装置（40），其包括用于发送和接收第一毫米波信号的第一毫米波收发器天线阵列（41） 第二毫米波收发器装置（40'），其包括用于发送和接收第二毫米波信号的第二毫米波收发器天线阵列（41'），并且被配置为与所述第一毫米波收发器装置相反的方向; 连接构件（26,27），用于将第一毫米波收发器装置（40）连接到第二毫米波收发器装置（40'）; 以及驱动装置（50），其驱动所述第一和第二毫米波收发器装置之一，使得所述第一毫米波收发器装置（40）和所述第二毫米波收发器装置（40'）沿相反方向移动。

公开(公告)号：US20150030225A1

公开(公告)日：2015-01-29

申请号：US14337209

申请日：2014-07-22

Applicant: TSINGHUA UNIVERSITY ,  NUCTECH COMPANY LIMITED

Inventor： Yuxiang XING ,  Le SHEN ,  Li ZHANG ,  Zhiqiang CHEN ,  Liang LI

IPC: G06T11/00 ,  G06T5/00 ,  G01N23/04

CPC classification number: G01N23/046 ,  G06T11/006 ,  G06T2207/10081 ,  G06T2207/20182 ,  G06T2207/30004 ,  G06T2211/408 ,  G06T2211/424

Abstract: The present disclosure relates to a self-prior information based X-ray dual-energy CT reconstruction method, which can utilize information inherent in data to provide a prior model, thereby obtaining a reconstructed image with a high quality. The X-ray dual-energy CT reconstruction method according to the present disclosure comprises: (a) rating an energy spectrum and establishing a dual-energy lookup table; (b) collecting high-energy data pH and low-energy data pL of a dual-energy CT imaging system using a detector of the dual-energy CT imaging system; (c) obtaining projection images R1 and R2 of scaled images r1 and r2 according to the obtained high-energy data pH and low-energy data pL; (d) reconstructing the scaled image r2 using a first piece-wise smooth constraint condition and thereby obtaining an electron density image; and (e) reconstructing the scaled image r1 using a second piece-wise smooth constraint condition and thereby obtaining an equivalent atomic number image. In the present disclosure, the noise in the dual-energy reconstructed image can be effectively prohibited while keeping the resolution by effectively using information inherent in data.

Abstract translation: 本公开涉及一种基于自我先验信息的X射线双能CT重建方法，其可以利用数据中固有的信息来提供先验模型，从而获得具有高质量的重建图像。 根据本公开的X射线双能CT重建方法包括：（a）评估能谱并建立双能量查找表; （b）使用双能CT成像系统的检测器收集双能CT成像系统的高能数据pH和低能量数据pL; （c）根据获得的高能量数据pH和低能量数据pL，获得缩放图像r1和r2的投影图像R1和R2; （d）使用第一分段平滑约束条件重建缩放图像r2，从而获得电子密度图像; 和（e）使用第二分段平滑约束条件重建缩放图像r1，从而获得等效的原子序数图像。 在本公开中，可以有效地禁止双能量重构图像中的噪声，同时通过有效地使用数据中固有的信息来保持分辨率。