公开(公告)号：US10274636B2

公开(公告)日：2019-04-30

申请号：US14582076

申请日：2014-12-23

Applicant: NUCTECH COMPANY LIMITED ,  TSINGHUA UNIVERSITY

Inventor： Huaping Tang ,  Zhiqiang Chen ,  Chuanxiang Tang ,  Huaibi Chen ,  Yuanjing Li ,  Ziran Zhao ,  Yaohong Liu ,  Shangmin Sun ,  Xinshui Yan ,  Zhanfeng Qin

IPC: G01V5/00 ,  G03C9/00 ,  G01N23/04

Abstract: The present invention may perform fluoroscopic imaging simultaneously on the subjects in at least two channels using only one electron accelerator, at least two sets of X-ray beams and at least two sets of detector systems, through the design of the electron accelerator, the shielding and collimating device, the at least two detector arrays and various mechanical composite structures. The X-ray fluoroscopic imaging system according to the present invention may be designed in specific forms of a stationary type, an assembled type, a track mobile type or vehicular mobile type, etc., and has advantages such as simple structure, low cost, strong function, good image quality and the like.

公开(公告)号：US09846258B2

公开(公告)日：2017-12-19

申请号：US14792066

申请日：2015-07-06

Applicant: NUCTECH COMPANY LIMITED

Inventor： Zhiqiang Chen ,  Yuanjing Li ,  Ziran Zhao ,  Wanlong Wu ,  Yingkang Jin ,  Le Tang ,  Chengcong Xu ,  Ming Ruan ,  Guangwei Ding

IPC: G01N23/201 ,  G01V5/00 ,  G01N23/203

CPC classification number: G01V5/0025 ,  G01N23/203 ,  G01V5/0066

Abstract: The present disclosure provides an X-ray backscattering safety inspection system, comprising: one or more backscattering inspection subsystem configured to inspect an object to be inspected by emitting X-ray beams towards the object to be inspected and inspecting scattering signals; and a control subsystem configured to adjust a distance between the backscattering inspection subsystem and locations on a side of the object to be inspected where are irradiated by the X-ray beams in real time according to a size of the object to be inspected such that the scattering signals inspected are optimized. The system may be adapted to objects to be inspected with different sizes or shapes while enhancing backscattering signals for imaging.

公开(公告)号：US09771515B2

公开(公告)日：2017-09-26

申请号：US14827248

申请日：2015-08-14

Applicant: Tsinghua University ,  Nuctech Company Limited

Inventor： Yanchun Wang ,  Qingjun Zhang ,  Yuanjing Li ,  Zhiqiang Chen ,  Ziran Zhao ,  Yinong Liu ,  Yaohong Liu ,  Jianping Chang ,  Shuqing Zhao ,  Wenjian Zhang ,  Yongqiang Wang

IPC: C09K11/77 ,  C04B35/63 ,  C04B35/645 ,  G01T1/29

CPC classification number: C09K11/7771 ,  C04B35/547 ,  C04B35/62615 ,  C04B35/6303 ,  C04B35/645 ,  C04B35/6455 ,  C04B2235/3224 ,  C04B2235/445 ,  C04B2235/5436 ,  C04B2235/5463 ,  C04B2235/604 ,  C04B2235/656 ,  C04B2235/6565 ,  C04B2235/662 ,  G01T1/2935

Abstract: The present disclosure is directed to a low cost sintering process for the preparation of gadolinium oxysulfide having a general formula of Gd2O2S, referred to as GOS, scintillation ceramics, comprising uniaxial hot pressing primary sintering and hot isostatic pressing secondary sintering.

公开(公告)号：US09651507B2

公开(公告)日：2017-05-16

申请号：US14572528

申请日：2014-12-16

Applicant: Tsinghua University ,  Nuctech Company Limited

Inventor： Zhiqiang Chen ,  Ziran Zhao ,  Yuanjing Li ,  Wanlong Wu ,  Ming Ruan ,  Li Zhang ,  Yingkang Jin ,  Le Tang ,  Xianli Ding ,  Chenguang Zhu

IPC: G01N23/203 ,  G01T1/167 ,  G01V5/00

CPC classification number: G01N23/203 ,  G01T1/167 ,  G01V5/0025 ,  G01V5/0091

Abstract: A human body back-scattering inspection method and system are discloses. The method includes: obtaining a back-scattering scan image of a human body under inspection; distinguishing a body image from a background image in the back-scattering scan image; and calculating a feature parameter of the background image to determine whether radioactive substance is carried with the human body. With some embodiments of the present disclosure, it is possible to determine whether any radioactive substance is carried with a human body during back-scattering inspection of the human body. In further embodiments of the present disclosure, it is possible to approximately determine which part(s) of the human body carries the radioactive substance. This improves efficiency of inspection.

公开(公告)号：US09618484B2

公开(公告)日：2017-04-11

申请号：US14577603

申请日：2014-12-19

Applicant: NUCTECH COMPANY LIMITED

Inventor： Qingjun Zhang ,  Yuanjing Li ,  Zhiqiang Chen ,  Qiufeng Ma ,  Ziran Zhao ,  Yinong Liu ,  Yaohong Liu ,  Junxiao Wang ,  Xiang Zou ,  Yanchun Wang ,  Jianping Chang ,  Linxia Tan

IPC: G01N30/18 ,  G01N30/12 ,  G01N30/72 ,  G01N27/62 ,  G01N30/20 ,  G01N30/30 ,  G01N30/02

CPC classification number: G01N30/18 ,  G01N27/622 ,  G01N30/12 ,  G01N30/20 ,  G01N30/30 ,  G01N30/7206 ,  G01N2030/025

Abstract: The present invention discloses a general sample injector, comprising a sample injection port mechanism, a sample injector shell, a vaporizing chamber, a heater, a temperature control unit, a carrier gas channel, a septum purge channel, a flow splitting channel, a coolant channel, a multichannel flow control valve and a temperature control unit. The general sample injector, equivalent to a “programmed temperature vaporizer” injector combining splitting/no splitting with cold column head sample injection, gives full play to the advantages of various sample injection modes, overcomes a plurality of disadvantages, and has higher practicability and better flexibility.

公开(公告)号：US09615438B2

公开(公告)日：2017-04-04

申请号：US14758484

申请日：2013-11-21

Applicant: TSINGHUA UNIVERSITY ,  NUCTECH COMPANY LIMITED

Inventor： Kejun Kang ,  Chuanxiang Tang ,  Ziran Zhao ,  Zhe Zhang

IPC: H01J35/04 ,  H05G1/10 ,  H01J35/06 ,  H01J35/08 ,  G01N23/04 ,  A61B6/03 ,  A61B6/00

CPC classification number: H05G1/10 ,  A61B6/032 ,  A61B6/40 ,  A61B6/4064 ,  G01N23/046 ,  G01N2223/308 ,  G01N2223/419 ,  H01J35/06 ,  H01J35/08 ,  H01J2235/086

Abstract: CT devices and methods thereof are disclosed. The CT device comprises a circular electron beam emission array including a plurality of electron beam emission units that are distributed uniformly along a circle, wherein each electron beam emission unit emits electron beams that are substantially parallel to an axis of the circular electron beam emission array in sequence under the control of a control signal; a circular reflection target which is disposed to be coaxial with the circular electron beam emission array, wherein the electron beams bombard the circular reflection target to generate X-rays that intersect the axis of the circular electron beam emission array; and a circular detector array which is disposed to be coaxial with the circular reflection target and configured to include a plurality of detection units which receive the X-rays after they have passed through an object to be detected.

公开(公告)号：US09599705B2

公开(公告)日：2017-03-21

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 ,  G01S13/88 ,  G01V8/00

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

Abstract: A millimeter wave three dimensional holographic scan imaging apparatus and a method for inspecting a human body or an article are disclosed. The apparatus comprises a first millimeter wave transceiver module, a second millimeter wave transceiver module, a first guide rail device to which the first millimeter wave transceiver module is connected in slidable form, a second guide rail device to which the second millimeter wave transceiver module is connected in slidable form, a driver configured to drive the first/second millimeter 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 millimeter 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.

公开(公告)号：US09557436B2

公开(公告)日：2017-01-31

申请号：US14138447

申请日：2013-12-23

Applicant: Tsinghua University ,  Nuctech Company Limited

Inventor： Zhiqiang Chen ,  Li Zhang ,  Ziran Zhao ,  Qiang Li ,  Jianping Gu ,  Qingping Huang

IPC: G06T17/00 ,  G01V5/00 ,  G06T7/00 ,  G06K9/00

CPC classification number: G01V5/005 ,  G06K9/00214 ,  G06K2209/09 ,  G06T7/11 ,  G06T7/187 ,  G06T17/00 ,  G06T2207/10081 ,  G06T2207/30112

Abstract: Disclosed are methods and apparatuses for creating a 3-Dimensional model for objects in an inspected luggage in a CT system. The method includes acquiring slice data of the luggage with the CT system; interpolating the slice data to generate 3D volume data of the luggage; performing unsupervised segmentation on the 3D volume data of the luggage to obtain a plurality of segmental regions; performing isosurface extraction on the plurality of segmental regions to obtain corresponding isosurfaces; and performing 3D surface segmentation on the isosurfaces to form a 3D model for the objects in the luggage. The above solutions can create a 3D model for objects in the inspected luggage in a relatively accurate manner, and thus provide better basis for subsequent shape feature extraction and security inspection, and reduce omission factor.

Abstract translation: 公开了用于在CT系统中检查的行李中的物体创建三维模型的方法和装置。 该方法包括采用CT系统获取行李的切片数据; 内插切片数据以生成行李的3D体积数据; 对行李的3D体积数据执行无监督分割以获得多个分段区域; 在多个分段区域进行等值面提取以获得相应的等值面; 并在等面上执行3D表面分割，以形成行李中物体的3D模型。 上述解决方案可以以相对准确的方式为被检查行李中的对象创建3D模型，从而为随后的形状特征提取和安全检查提供更好的依据，并减少遗漏因素。

公开(公告)号：US09464997B2

公开(公告)日：2016-10-11

申请号：US14129669

申请日：2012-12-28

Applicant: Nuctech Company Limited ,  Tsinghua University

Inventor： Shuwei Li ,  Zhiqiang Chen ,  Yuanjing Li ,  Ziran Zhao ,  Yinong Liu ,  Qingjun Zhang ,  Weibin Zhu ,  Yi Wang ,  Shuqing Zhao ,  Wenjian Zhang

IPC: G01N23/087 ,  G01T1/22

CPC classification number: G01N23/087 ,  G01N2223/402 ,  G01N2223/507 ,  G01T1/22

Abstract: Methods and apparatuses for measuring an effective atomic number of an object are disclosed. The apparatus includes: a ray source configured to product a first X-ray beam having a first energy and a second X-ray beam having a second energy; a Cherenkov detector configured to receive the first X-ray beam and the second X-ray beam that pass through an object under detection, and to generate a first detection value and a second detection value; and a data processing device configured to obtain an effective atomic number of the object based on the first detection value and the second detection value. The Cherenkov detector can eliminate disturbance of X-rays below certain energy threshold with respect to the object identification, and thus accuracy can be improved for object identification.

Abstract translation: 公开了用于测量物体的有效原子序数的方法和装置。 该装置包括：射线源，被配置为产生具有第一能量的第一X射线束和具有第二能量的第二X射线束; 切伦科夫检测器，被配置为接收通过检测对象的第一X射线束和第二X射线束，并产生第一检测值和第二检测值; 以及数据处理装置，被配置为基于所述第一检测值和所述第二检测值来获得所述对象的有效原子序数。 切恩科夫检测器可以消除相对于物体识别的某些能量阈值以下的X射线干扰，从而可以提高对象识别的精度。

公开(公告)号：US09366642B2

公开(公告)日：2016-06-14

申请号：US14135840

申请日：2013-12-20

Applicant: Nuctech Company Limited ,  Tsinghua University

Inventor： Ziran Zhao ,  Zhiqiang Chen ,  Yuanjing Li ,  Wanlong Wu ,  Ming Ruan ,  Yinong Liu ,  Yingkang Jin ,  Le Tang ,  Yanjie Wen ,  Xiuwei Chen ,  Fuhua Ding ,  Bin Sang ,  Zongjun Shen

IPC: G01N23/203 ,  G01T1/167 ,  G01V5/00 ,  A61B6/00

CPC classification number: G01N23/203 ,  A61B6/4021 ,  A61B6/4266 ,  A61B6/483 ,  G01T1/167 ,  G01V5/0025

Abstract: A human body back-scattering inspection system is disclosed. The system comprises a flying-spot forming unit configured to output beams of X-rays, a plurality of discrete detectors which are arranged vertically along a human body to be inspected, and a controlling unit coupled to the flying-spot forming unit and the plurality of detectors, and configured to generate a control signal to control the flying-spot forming unit and the plurality of detectors to perform a partition synchronous scan on the human body to be inspected vertically. The present disclosure utilizes the geometry property of the human body back-scattering inspection system, and proposes a multiple-point synchronous scan mechanism which largely accelerates the inspection of human body.

Abstract translation: 公开了一种人体背散射检查系统。 该系统包括：飞点形成单元，被配置为输出X射线束;沿着待检查的人体垂直排列的多个离散检测器;以及耦合到飞点形成单元和多个 的检测器，并且被配置为产生控制信号以控制飞点形成单元和多个检测器，以对垂直检查的人体进行分区同步扫描。 本发明利用人体背散射检查系统的几何特性，并提出了一种大大加速人体检查的多点同步扫描机构。