公开(公告)号：US09261610B2

公开(公告)日：2016-02-16

申请号：US14574848

申请日：2014-12-18

Applicant: Nuctech Company Limited

Inventor： Qingjun Zhang ,  Yuanjing Li ,  Zhiqiang Chen ,  Yulan Li ,  Qiufeng Ma ,  Ziran Zhao ,  Yinong Liu ,  Jianping Chang

IPC: G01T1/24 ,  G01T1/36

CPC classification number: G01T1/244 ,  G01T1/24 ,  G01T1/241 ,  G01T1/366

Abstract: The present disclosure provides a High-Purity Germanium (HPGe) detector, comprising: a HPGe single crystal having an intrinsic region exposed surface; a first electrode and a second electrode connected to a first contact electrode and a second contact electrode of the HPGe single crystal respectively; and a conductive guard ring arranged in the intrinsic region exposed surface around the first electrode to separate the intrinsic region exposed surface into an inner region and an outer region. A leakage current derived from the intrinsic region exposed surface of the HPGe detector can be separated from the current of the HPGe detector by the conductive guard ring provided in the surface, thereby suppressing the interference of the surface leakage current.

Abstract translation: 本公开提供了一种高纯锗（HPGe）检测器，包括：具有固有区域暴露表面的HPGe单晶; 分别连接到HPGe单晶的第一接触电极和第二接触电极的第一电极和第二电极; 以及布置在第一电极周围的本征区域暴露表面中的导电保护环，以将本征区域暴露表面分离成内部区域和外部区域。 从HPGe检测器的本征区域暴露表面导出的泄漏电流可以通过设置在表面中的导电保护环与HPGe检测器的电流分离，从而抑制表面泄漏电流的干扰。

公开(公告)号：US20150356755A1

公开(公告)日：2015-12-10

申请号：US14758795

申请日：2013-10-31

Applicant: NUCTECH COMPANY LIMITED ,  TSINGHUA UNIVERSITY

Inventor： Le Shen ,  Yuxiang Xing ,  Yuanji Li ,  Chuqing Feng ,  Li Zhang ,  Zhiqiang Chen

IPC: G06T11/00 ,  A61B6/03 ,  A61B6/00 ,  G06T5/50

CPC classification number: G06T11/005 ,  A61B6/032 ,  A61B6/4241 ,  A61B6/4266 ,  A61B6/482 ,  A61B6/5205 ,  G01N23/046 ,  G01N2223/419 ,  G01T1/2985 ,  G06T5/50 ,  G06T2207/10081 ,  G06T2207/20182

Abstract: CT imaging systems and methods thereof are disclosed. A common CT scanning is performed on an object to obtain a common CT imaging. An area of interest is determined from the image. A CT scanning is performed on the area of interest under a plurality of energy windows by a photon counter detector. A high resolution image of the area of interest is reconstructed. The discrimination of energy spectrum is higher and the result so obtained is more stable by using a photon counter detector to collect photon count projection data of a plurality of energy windows and thus it may be decomposed into a plurality of basis functions.

Abstract translation: 公开了CT成像系统及其方法。 对物体执行常见的CT扫描以获得常见的CT成像。 根据图像确定感兴趣的区域。 通过光子计数器检测器在多个能量窗口下对感兴趣的区域进行CT扫描。 重建感兴趣区域的高分辨率图像。 通过使用光子计数器检测器来收集多个能量窗口的光子计数投影数据，能量谱的辨别较高，得到的结果更加稳定，因此可将其分解为多个基本函数。

公开(公告)号：US20150332486A1

公开(公告)日：2015-11-19

申请号：US14708866

申请日：2015-05-11

Applicant: Nuctech Company Limited ,  Tsinghua University

Inventor： Li Zhang ,  Zhiqiang Chen ,  Le Shen ,  Yuxiang Xing ,  Xin Jin ,  Qingping Huang

IPC: G06T11/00 ,  G06T7/00 ,  A61B6/00 ,  A61B6/03 ,  A61B6/02

CPC classification number: G06T11/006 ,  A61B6/027 ,  A61B6/032 ,  A61B6/4085 ,  A61B6/4266 ,  A61B6/5205 ,  G06T7/0012 ,  G06T2207/10081 ,  G06T2207/30004 ,  G06T2211/421

Abstract: The present disclosure discloses a spiral CT system and a reconstruction method thereof. In some embodiments, it is proposed that data missing due to a large pitch is compensated by weighting the complementary projection data of the projection data obtained using the spiral CT system. After the data is complemented, the projection data is rebinned as cone parallel beam data, cone-angle cosine weighting and one-dimensional filtering are implemented on the rebinned data, and parallel beam back projection is finally implemented on the filtered data, to obtain the reconstructed images. In some embodiments, with the above method, the speed of the belt can be increased by more than one time in a case that the existing area of the detectors and the existing speed of the slip ring are unchanged, thereby improving the pass rate of the luggage and maintaining the quality of the reconstructed images unchanged.

Abstract translation: 本公开公开了一种螺旋CT系统及其重建方法。 在一些实施例中，提出通过对使用螺旋CT系统获得的投影数据的互补投影数据进行加权来补偿由于大音调而丢失的数据。 数据补充后，将投影数据重新设置为锥形平行光束数据，对重定位数据进行锥角余弦加权和一维滤波，最后在滤波数据上实现平行光束反投影，获得 重建图像。 在一些实施例中，利用上述方法，在检测器的现有区域和滑环的现有速度不变的情况下，带的速度可以增加多于一次，从而提高了传感器的通过率 行李保持重建图像的质量不变。

公开(公告)号：US20150323664A1

公开(公告)日：2015-11-12

申请号：US14451297

申请日：2014-08-04

Applicant: Nuctech Company Limited

Inventor： Wanlong Wu ,  Zhiqiang Chen ,  Yuanjing Li ,  Ziran Zhao ,  Zongjun Shen ,  Yinong Liu ,  Bin Sang ,  Wenguo Liu

IPC: G01S13/89 ,  G01S13/02

CPC classification number: G01S13/89 ,  G01S13/02 ,  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. In one aspect, the apparatus includes a first and second millimeter wave transceiver module. The apparatus also includes a guide rail device for each millimeter wave transceiver module. Each guide rail is connected to its respective transceiver module in slidable form. A driver drives each millimeter wave transceiver module to move along its guide rail device. Each millimeter wave transceiver module performs plane scans on the human body or article being inspected. A data processing device generates a millimeter wave holographic image from the plane scans.

Abstract translation: 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制品的方法。 在一个方面，该装置包括第一和第二毫米波收发器模块。 该装置还包括用于每个毫米波收发器模块的导轨装置。 每个导轨以可滑动的形式连接到其相应的收发器模块。 驱动器驱动每个毫米波收发器模块沿其导轨装置移动。 每毫米波收发器模块对人体或正在检查的物品执行平面扫描。 数据处理装置从平面扫描生成毫米波全息图像。

公开(公告)号：US09052284B2

公开(公告)日：2015-06-09

申请号：US14128894

申请日：2012-12-28

Applicant: Nuctech Company Limited

Inventor： Shiping Cao ,  Qingjun Zhang ,  Zhiqiang Chen ,  Ziran Zhao ,  Yuanjing Li ,  Yinong Liu ,  Shuqiang Dong

IPC: H01J49/26 ,  G01N27/62

CPC classification number: G01N27/624 ,  G01N27/622

Abstract: The present invention discloses an asymmetric field ion mobility spectrometer. It comprises an ionization source, for generating ions; an electrode plate; a plurality of electrode filaments, arranged in opposite to and spaced apart from the electrode plate by an analysis gap, wherein a high voltage of electrical field is applied between the electrode plate and the electrode filaments to form an ion migration area, the electrode filaments used to collect the ions that do not pass through the ion migration area; and a collection electrode, disposed at a rear end of the ion migration area, and collecting the ions that have passed through the ion migration area. The present asymmetric field ion mobility spectrometer is capable of improving accuracy of identifying peak positions of the ions, reducing scanning time of DC voltage and types of compensation voltage, thereby increasing ion detection efficiency.

Abstract translation: 本发明公开了一种不对称场离子迁移谱仪。 它包括用于产生离子的电离源; 电极板; 多个电极丝，通过分析间隙与电极板相对并间隔布置，其中在电极板和电极丝之间施加高电压的电场以形成离子迁移区域，所用的电极丝 收集不通过离子迁移区的离子; 以及收集电极，设置在离子迁移区域的后端，并且收集已经通过离子迁移区域的离子。 本不对称场离子淌度光谱仪能够提高识别离子峰位置的精度，减少直流电压的扫描时间和补偿电压的种类，从而提高离子检测效率。

公开(公告)号：US09020279B2

公开(公告)日：2015-04-28

申请号：US14146263

申请日：2014-01-02

Applicant: Tsinghua University ,  Nuctech Company Limited

Inventor： Li Zhang ,  Zhiqiang Chen ,  Jia Hao

IPC: G06K9/68 ,  G06K9/62 ,  G06T5/50

CPC classification number: G06K9/6202 ,  G06T5/50 ,  G06T2211/408

Abstract: Provided are image processing method and apparatus. The method includes selecting one of a plurality of images matched in structure as reference image, and select another of the images as subject image; for a subject pixel in the subject image, determining a pixel corresponding to the subject pixel in the reference image; calculating similarity values of at least part of pixels in the reference image with respect to the pixel corresponding to the subject pixel; establishing weight coefficients based on the similarity values, and weighted averaging the subject pixel in the subject image to obtain a processed pixel value. With the above solutions, it is possible to use structure information of a higher-quality image in processing another image, and thus improve quality of the other image.

Abstract translation: 提供图像处理方法和装置。 该方法包括选择结构中匹配的多个图像中的一个作为参考图像，并且选择另一个图像作为被摄体图像; 对于所述被摄体图像中的被摄体像素，确定与所述参考图像中的所述被摄体像素相对应的像素; 计算参考图像中与像素对应的像素的至少部分像素的相似度值; 基于相似度值建立权重系数，并对被摄体图像中的被摄体像素进行加权平均以获得经处理的像素值。 利用上述解决方案，可以在处理另一图像时使用较高质量图像的结构信息，从而提高其他图像的质量。

公开(公告)号：US20140211917A1

公开(公告)日：2014-07-31

申请号：US14129655

申请日：2012-12-31

Applicant: Tsinghua University ,  Nuctech Company Limited

Inventor： Zhiqiang Chen ,  Li Zhang ,  Ziran Zhao ,  Yuxiang Xing ,  Jia Hao ,  Liang Li

IPC: G01V5/00

CPC classification number: G01V5/0016 ,  A61B6/032 ,  A61B6/4007 ,  A61B6/4014 ,  A61B6/4078 ,  A61B6/4233 ,  A61B6/4275 ,  G01N23/046 ,  G01T1/2985 ,  G01V5/005

Abstract: The present invention discloses apparatus and method for ray scanning imaging. The apparatus comprises a plurality of ray generators and a ray detection device. The plurality of ray generators are arranged uniformly along a circular arc and emit ray beams in sequence or simultaneously to an object to be inspected within a single scanning period. The ray detection device may be either in a multi-segmental semi-closed configuration composed of a plurality of linear arrays of ray detectors or in a circular arc configuration where a plurality of ray detection units arranged uniformly along a circular arc. During the inspection, the apparatus is advantageous in obtaining the complete ray projection values without rotation thereof, so as to effectively shorten the inspection time.

Abstract translation: 本发明公开了一种用于射线扫描成像的装置和方法。 该装置包括多个射线发生器和射线检测装置。 多个射线发生器沿着圆弧均匀地布置，并且在单个扫描周期内依次发射射线束或同时发射到被检查物体。 射线检测装置可以是由多个线状阵列的射线检测器组成的多段半封闭构造，也可以是多个沿着圆弧均匀排列的射线检测单元的圆弧结构。 在检查期间，该装置有利于获得完整的射线投影值而不旋转，以便有效地缩短检查时间。

公开(公告)号：US20140185773A1

公开(公告)日：2014-07-03

申请号：US14136514

申请日：2013-12-20

Applicant: TSINGHUA UNIVERSITY ,  NUCTECH COMPANY LIMITED

Inventor： Zhiqiang Chen ,  Yuanjing LI ,  Ziran ZHAO ,  Wanlong WU ,  Le TANG ,  Yinong LIU ,  Yingkang JIN ,  Wenguo LIU ,  Shuo CAO ,  Zhimin ZHENG ,  Guangwei DING ,  Ming RUAN ,  Xiuwei CHEN

IPC: G01N23/203

CPC classification number: G01N23/203 ,  G01V5/0025

Abstract: A human body security inspection system including a plurality of ray emitting-detecting modules, which are configured to emit X-rays to the object to be inspected and to receive X-rays scattered from the object to be inspected, wherein the ray emitting-detecting modules form an enclosed region with respect to the object to be inspected and security inspection is implemented on the object in the enclosed region.

Abstract translation: 一种人体安全检查系统，包括多个射线发射检测模块，其被配置为向被检查物体发射X射线并且接收从被检查物体散射的X射线，其中，所述射线发射检测 模块相对于待检查对象形成封闭区域，并且在封闭区域中的对象上实施安全检查。

公开(公告)号：US12164023B2

公开(公告)日：2024-12-10

申请号：US17304927

申请日：2021-06-28

Applicant: Tsinghua University ,  Nuctech Company Limited

Inventor： Zhiqiang Chen ,  Yan You ,  Ziran Zhao ,  Xuming Ma ,  Kai Wang

IPC: G01S13/88 ,  G01S13/89

Abstract: A security inspection apparatus and a method of controlling the same are described. An example security inspection apparatus includes a bottom plate configured to carry an inspected object and a two-dimensional multi-input multi-output array panel, including at least one two-dimensional multi-input multi-output sub-array. Each two-dimensional multi-input multi-output sub-array includes transmitting antennas and receiving antennas arranged such that equivalent phase centers are arranged in a two-dimensional array. The security inspection apparatus includes a control circuit configured to control the transmitting antennas to transmit a detection signal in a form of an electromagnetic wave to the inspected object in a preset order, and to control the receiving antennas to receive an echo signal from the inspected object. The security inspection apparatus includes a signal processing device configured to reconstruct an image of an inspected object based on an echo signal received and a display device configured to display the reconstructed image.

公开(公告)号：US12131543B2

公开(公告)日：2024-10-29

申请号：US17202088

申请日：2021-03-15

Applicant: Tsinghua University ,  Nuctech Company Limited

Inventor： Li Zhang ,  Zhiqiang Chen ,  Yuanjing Li ,  Yuxiang Xing ,  Fanhua Meng ,  Qiang Li ,  Wei Li ,  Gang Fu

IPC: G06F16/583 ,  G06F16/55 ,  G06V10/20 ,  G06V10/75 ,  G06V10/764 ,  G06V10/82 ,  G06V20/20 ,  G06V20/52 ,  G06Q10/0832

CPC classification number: G06V20/52 ,  G06F16/55 ,  G06F16/583 ,  G06V10/255 ,  G06V10/75 ,  G06V10/764 ,  G06V10/82 ,  G06V20/20 ,  G06Q10/0832

Abstract: A semantic-based method and apparatus for retrieving a perspective image, an electronic device and a computer-readable storage medium are provided. An method includes obtaining a perspective image for a space containing an inspected object therein. A semantic division on the perspective image is performed using a first method, to obtain a plurality of semantic region units. A feature extraction network is constructed using a second method. Based on the perspective image and each of the plurality of semantic region units, a feature of each semantic region unit is extracted using the feature extraction network. Based on the feature of each semantic region unit, an image most similar to the semantic region unit is retrieved from an image feature database, to assist in determining an inspected object in the semantic region unit.