公开(公告)号：US09897716B2

公开(公告)日：2018-02-20

申请号：US14841991

申请日：2015-09-01

Applicant: TSINGHUA UNIVERSITY ,  NUCTECH COMPANY LIMITED

Inventor： Kejun Kang ,  Jingyu Gu ,  Zhiqiang Chen ,  Jianmin Li ,  Yuanjing Li ,  Yulan Li ,  Dongyu Wang

IPC: G01V5/00

CPC classification number: G01V5/0066 ,  G01V5/0016

Abstract: A vehicle-mounted inspection system comprises: a chassis; a rotation mechanism disposed on the chassis; a first ray emission device connected to the rotation mechanism and configured to emit a ray; a first detection device connected to the rotation mechanism and configured to receive the ray emitted by the first ray emission device; and a second ray emission device connected to the rotation mechanism and configured to emit a ray. The rotation mechanism is configured to rotate the first ray emission device, the first detection device and the second ray emission device substantially around an upright axis between a retracted position and an operating position.

公开(公告)号：US20170328844A1

公开(公告)日：2017-11-16

申请号：US15494884

申请日：2017-04-24

Applicant: Tsinghua University ,  Nuctech Company Limited

Inventor： Liang Li ,  Zhiqiang Chen ,  Kejun Kang ,  Li Zhang ,  Ziran Zhao ,  Yuxiang Xing ,  Jianmin Li ,  Yulan Li ,  Tiao Zhao

IPC: G01N23/087

CPC classification number: G01N23/087 ,  G01N23/046 ,  G01N2223/206 ,  G01N2223/419 ,  G01N2223/423

Abstract: Methods and system for decomposing a high-energy dual-energy X-ray CT material are disclosed. In the method, two types of effect such as Compton effect and electron pairing effect which dominates are reserved and the influence of the other effect such a photoelectric effect is removed so as to improve the accuracy of the material decomposition. The unique advantage of the present disclosure is to effectively remove the error of the calculated atomic number Z due to directly selecting two effects during processes of material decomposition in the conventional dual-energy CT method. This may greatly improve the accuracy of dual-energy CT identification of the material, and it is important to improve the conventional dual-use CT imaging system applications, such as clinical therapy, security inspection, industrial non-destructive testing, customs anti-smuggling and other fields.

公开(公告)号：US09772427B2

公开(公告)日：2017-09-26

申请号：US14892640

申请日：2014-01-17

Applicant: Tsinghua University ,  Nuctech Company Limited

Inventor： Kejun Kang ,  Jianmin Li ,  Ying Li ,  Yuanjing Li ,  Wei Yin ,  Juan Zheng ,  Lei Zeng

IPC: G01V5/00

CPC classification number: G01V5/0041 ,  G01V5/0025

Abstract: The disclosure provides a multi-power multi-dosage accelerator. The multi-power multi-dosage accelerator comprises an electron gun configured to provide a first voltage of the electron gun and a second voltage of the electron gun, and an accelerating tube configured to generate a first X-ray having a first dosage and first power according to the first voltage of the electron gun and generate a second X-ray having a second dosage and second power according to the second voltage of the electron gun, wherein the first dosage is a dosage which can be accepted by human bodies and is much less than the second dosage, the first X-ray is used for inspecting a first area where a person is located, and the second X-ray is used for inspecting a second area where goods are located.

公开(公告)号：US09508525B2

公开(公告)日：2016-11-29

申请号：US14494178

申请日：2014-09-23

Applicant: NUCTECH COMPANY LIMITED ,  Tsinghua University

Inventor： Kejun Kang ,  Chuanxiang Tang ,  Huaping Tang ,  Huaibi Chen ,  Wenhui Huang

IPC: A61N5/10 ,  H01J35/14 ,  H01J35/06 ,  H01J35/10 ,  H05H7/06

CPC classification number: H01J35/14 ,  A61N5/1077 ,  H01J35/06 ,  H01J35/106 ,  H01J2235/068 ,  H01J2235/086 ,  H01J2235/1262 ,  H05H7/06

Abstract: An apparatus and a method are for generating a flattening x-ray radiation field. The apparatus includes: plurality of electron accelerators for generating high-energy electron beam current; and a common target unit including a vacuum target chamber, a target and plurality of input connectors. The plurality of input connectors are connected to one side of the vacuum target chamber and the target is installed at the other side of the vacuum target chamber opposing the plurality of input connectors, the axes of which intersect in pairs at one point in an predetermined included angle. The plurality of electron accelerators are connected to the plurality of input connectors.

Abstract translation: 一种用于产生平坦的x射线辐射场的装置和方法。 该装置包括：多个用于产生高能电子束电流的电子加速器; 以及包括真空靶室，靶和多个输入连接器的公共目标单元。 多个输入连接器连接到真空靶室的一侧，并且目标件安装在真空靶室的与多个输入连接器相对的另一侧，多个输入连接器的轴线在预定的包括的一个点处成对地相交 角度。 多个电子加速器连接到多个输入连接器。

公开(公告)号：US20150342014A1

公开(公告)日：2015-11-26

申请号：US14758779

申请日：2013-10-31

Applicant: TSINGHUA UNIVERSITY ,  NUCTECH COMPANY LIMITED

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

IPC: H05G1/32 ,  G01N23/04 ,  A61B6/03 ,  H05G1/10

CPC classification number: H05G1/32 ,  A61B6/032 ,  A61B6/4028 ,  A61B6/4275 ,  G01N23/046 ,  G01N2223/419 ,  H01J35/08 ,  H01J2235/087 ,  H05G1/10 ,  H05G2/00 ,  H05H7/18

Abstract: CT devices and methods thereof are disclosed. The CT device comprises a circular electron gun array including a plurality of electron guns, each of the electron guns is configured to emit electron beams along the radial direction of the circular electron gun array in sequence according to a predetermine pulse sequence; an acceleration cavity disposed inside of a circle on which the circular electron gun array is positioned, including a plurality of nested concentric coaxial cavities that operate in π mode for accelerating electron beams emitted from the respective electron guns of the circular electron gun array; a circular transmission target disposed inside of a circle on which the acceleration cavity is positioned and being bombarded by the accelerated electron beams to generate X-rays; and a circular detector configured to receive the X-rays after they have passed through an object to be detected.

Abstract translation: 公开了CT装置及其方法。 该CT设备包括圆形电子枪阵列，其包括多个电子枪，每个电子枪被配置为根据的预定脉冲序列，以发射电子束沿在序列中的圆形的电子枪阵列的径向方向上; 设置在其上定位有圆形电子枪阵列的圆的内部的加速腔，包括多个嵌套的同心同轴腔，其在“ 用于加速从圆形电子枪阵列的各个电子枪发射的电子束的模式; 设置在加速腔位于其上并被加速电子束轰击以产生X射线的圆内的圆形透射目标; 以及圆形检测器，被配置为在它们通过待检测物体之后接收X射线。

公开(公告)号：US20150340192A1

公开(公告)日：2015-11-26

申请号：US14758768

申请日：2013-10-31

Applicant: Tsinghua University ,  NUCTECH COMPANY LIMITED

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

IPC: H01J35/14 ,  G01N23/04 ,  A61B6/03 ,  H05G1/10

CPC classification number: H01J35/14 ,  A61B6/032 ,  A61B6/4028 ,  A61B6/4275 ,  F04C2270/041 ,  G01N23/046 ,  G01N2223/419 ,  H05G1/10

Abstract: CT Devices and methods thereof are disclosed. The CT device comprises an electron beam generation unit, a circular reflection target (9) and a circular detector array. The electron beam generation unit comprises an electron gun (7), a deflection scanning unit and a restrictor (16), wherein the electron gun (7) generates electron beams, the deflection scanning unit deflects the electron beams with a deflection direction varying as time so as to implement a circular scanning, and the restrictor (16) has a plurality of circularly distributed holes, and wherein when the electron beams scan along the circularly distributed holes, a plurality of electron beams that are distributed circularly are output. The circular reflection target (9) is disposed to be coaxial with the circularly distributed electron beams, wherein the circularly distributed electron beams bombard the circular reflection target (9) to generate X-rays that intersect the axis of the circularly distributed electron beams. The circular detector array (11) is disposed to be coaxial with the circular reflection target and includes a plurality of detection units which receive the X-rays after they have passed through an object to be detected (10).

Abstract translation: CT公开了其装置及其方法。 CT装置包括电子束产生单元，圆形反射目标（9）和圆形检测器阵列。 电子束生成单元包括电子枪（7），偏转扫描单元和限制器（16），其中电子枪（7）产生电子束，偏转扫描单元偏转电子束，偏转方向随时间变化 以实现圆形扫描，并且限制器（16）具有多个圆形分布的孔，并且其中当电子束沿着圆形分布的孔扫描时，输出循环分布的多个电子束。 圆形反射目标（9）设置成与圆形分布的电子束同轴，其中圆形分布的电子束轰击圆形反射目标（9）以产生与圆形分布的电子束的轴线相交的X射线。 圆形检测器阵列（11）设置成与圆形反射目标同轴，并且包括多个检测单元，它们在通过待检测物体（10）之后接收X射线。