公开(公告)号：US20150220683A1

公开(公告)日：2015-08-06

申请号：US14540457

申请日：2014-11-13

Applicant: Nuctech Company Limited

Inventor： Zhiqiang CHEN ,  Yuanjing LI ,  Li ZHANG ,  Ziran ZHAO ,  Jianping GU ,  Shuo WANG

IPC: G06F19/12 ,  G06F17/18

CPC classification number: G16B5/00 ,  G06F17/18 ,  G06K9/6209 ,  G06K2209/055 ,  G06T17/20 ,  G06T2210/41

Abstract: Disclosed is method and apparatus for creating a statistical average model of an enamel-dentine junction. The method includes steps of: acquiring CT image data of a tooth; segmenting the CT image data to obtain a surface of an enamel-dentine junction; segmenting the obtained surface using a curvature-based clustering algorithm to remove a bottom of the enamel-dentine junction; spherical-parameterizing, by means of spherical harmonic analysis, the surface of the enamel-dentine junction after removal of the bottom; and aligning different samples of the tooth to obtain a statistical average model.

Abstract translation: 公开了用于创建釉质 - 牙质结的统计平均模型的方法和装置。 该方法包括以下步骤：获取牙齿的CT图像数据; 分割CT图像数据以获得釉 - 牙质结的表面; 使用基于曲率的聚类算法分割所获得的表面以去除釉质 - 牙质结的底部; 球形参数化，通过球面谐波分析，去除底部后的釉质 - 牙质结的表面; 并对齐不同牙齿样本以获得统计学平均模型。

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：US20150185335A1

公开(公告)日：2015-07-02

申请号：US14576674

申请日：2014-12-19

Applicant: NUCTECH COMPANY LIMITED ,  TSINGHUA UNIVERSITY

Inventor： Ziran ZHAO ,  Zhiqiang CHEN ,  Yuanjing LI ,  Wanlong WU ,  Yinong LIU ,  Ming RUAN ,  Yingkang JIN ,  Le TANG

IPC: G01T1/20

CPC classification number: G01T1/2002 ,  G01T1/2008

Abstract: The invention presents a backscattering scintillation detector. The scintillation detector includes a scintillation crystal detector; a X-ray sensitizing screen, which is disposed forward the scintillation crystal detector and where a backscattered X-ray from an object to be detected is processed and then at least part of the processed X-ray is incident to scintillation crystal detector; and photoelectric multiplier, which is disposed backward the scintillation crystal detector and is configured to collect a light signal from scintillation crystal detector and convert it to an electrical signal. Through the above preferable embodiment, a X-ray sensitizing screen, a scintillation crystal detector, and light guiding and wave-drifting technologies are combined together to obtain a novel scintillation detector, which can improve detection of X-ray, transmission of light signal and conversion of light signal to electrical signal.

Abstract translation: 本发明提出了一种后向散射闪烁检测器。 闪烁检测器包括闪烁晶体检测器; 设置在闪烁晶体检测器前方的X射线增感屏幕，并且处理来自被检测物体的背散射​​X射线，然后处理的X射线的至少一部分入射到闪烁晶体检测器; 以及光电倍增器，其设置在闪烁晶体检测器的后方，并且被配置为从闪烁晶体检测器收集光信号并将其转换为电信号。 通过上述优选实施例，将X射线增感屏，闪烁晶体检测器和导光波漂移技术组合在一起，以获得新的闪烁检测器，其可以改善X射线的检测，光信号的传输和 光信号转换为电信号。

公开(公告)号：US20150185189A1

公开(公告)日：2015-07-02

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 ,  G01N27/62 ,  G01N30/72

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.

Abstract translation: 本发明公开了一种一般的样品注射器，其包括样品注入端口机构，样品注射器壳体，蒸发室，加热器，温度控制单元，载气通道，隔膜清洗通道，分流通道，冷却剂 通道，多通道流量控制阀和温度控制单元。 一般样品注射器相当于组合分离/不分离与冷柱头样品注入的“编程温度蒸发器”注射器，充分发挥各种样品注射模式的优点，克服了多种缺点，具有较高的实用性和更好的效果 灵活性。

公开(公告)号：US20150185166A1

公开(公告)日：2015-07-02

申请号：US14582069

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: G01N23/04 ,  G21K1/02 ,  G01T7/08 ,  G01V5/00

CPC classification number: G01N23/043 ,  G01T7/08 ,  G01V5/0033 ,  G01V5/0041 ,  G01V5/005 ,  G21K1/025

Abstract: The X-ray fluoroscopic imaging system of the present invention comprises: an inspection passage; an electron accelerator; a shielding collimator apparatus comprising a shielding structure, and a first collimator for extracting a low energy planar sector X-ray beam and a second collimator for extracting a high energy planar sector X-ray beam which are disposed within the shielding structure; a low energy detector array for receiving the X-ray beam from the first collimator; and a high energy detector array for receiving the X-ray beam from the second collimator. The first collimator, the low energy detector array and the target point bombarded by the electron beam are located in a first plane; and the second collimator, the high energy detector array and the target point bombarded by the electron beam are located in a second plane.

Abstract translation: 本发明的X射线透视成像系统包括：检查通道; 电子加速器; 包括屏蔽结构的屏蔽准直器装置和用于提取低能平面扇形X射线束的第一准直器和用于提取设置在屏蔽结构内的高能平面扇形X射线束的第二准直器; 低能量检测器阵列，用于接收来自第一准直仪的X射线束; 以及用于从第二准直器接收X射线束的高能量检测器阵列。 第一准直器，低能量检测器阵列和由电子束轰击的目标点位于第一平面中; 并且第二准直器，高能量检测器阵列和由电子束轰击的目标点位于第二平面中。

公开(公告)号：US20150185154A1

公开(公告)日：2015-07-02

申请号：US14576699

申请日：2014-12-19

Applicant: Nuctech Company Limited

Inventor： Zhiqiang CHEN ,  Ziran ZHAO ,  Jianhong ZHANG ,  Hongqiu WANG ,  Yumin YI

IPC: G01N21/65

CPC classification number: G01N21/65 ,  G01J3/28 ,  G01J3/44 ,  G01J3/4412 ,  G01N2201/06113 ,  G01N2201/12

Abstract: An embodiment of the present invention provides a Raman spectroscopic detection method for detecting a sample in a vessel, comprising the steps of: (a) measuring a Raman spectrum of the vessel to obtain a first Raman spectroscopic signal; (b) measuring a Raman spectrum of the sample through the vessel to obtain a second Raman spectroscopic signal; (c) removing an interference caused by the Raman spectrum of the vessel from the second Raman spectroscopic signal on basis of the first Raman spectroscopic signal to obtain a third Raman spectroscopic signal of the sample itself; and (d) identifying the sample on basis of the third Raman spectroscopic signal. By means of the above method, the Raman spectrum of the sample in the vessel may be detected correctly so as to identify the sample to be detected efficiently.

Abstract translation: 本发明的一个实施方案提供一种用于检测容器中的样品的拉曼光谱检测方法，包括以下步骤：（a）测量容器的拉曼光谱以获得第一拉曼光谱信号; （b）通过容器测量样品的拉曼光谱，以获得第二拉曼光谱信号; （c）基于所述第一拉曼光谱信号从所述第二拉曼光谱信号中除去由所述容器的拉曼光谱引起的干扰，以获得所述样品本身的第三拉曼光谱信号; 和（d）基于第三拉曼光谱信号鉴定样品。 通过上述方法，可以正确地检测容器中的样品的拉曼光谱，以便有效地鉴定要检测的样品。

公开(公告)号：US20150154809A1

公开(公告)日：2015-06-04

申请号：US14540440

申请日：2014-11-13

Applicant: Tsinghua University ,  Nuctech Company Limited

Inventor： Zhiqiang CHEN ,  Yuanjing LI ,  Ziran ZHAO ,  Shuo WANG ,  Jianping GU ,  Yunda SUN

IPC: G06T19/20 ,  G06T15/10 ,  G06T15/06 ,  G06T7/00

CPC classification number: G06T19/20 ,  G06T7/0012 ,  G06T15/06 ,  G06T15/08 ,  G06T15/10 ,  G06T17/005 ,  G06T2207/10136 ,  G06T2210/12 ,  G06T2219/2021

Abstract: The present disclosure provides method and apparatus for marking a target in a 3D image. The method include steps of: acquiring Computed Tomography (CT) image data of a scene; rendering a 3D image of the scene using ray casting based on the CT image data; removing a transparent region from the 3D image based on a fixed 2D transfer function; and marking the target in the 3D image.

Abstract translation: 本公开提供了用于在3D图像中标记目标的方法和装置。 该方法包括以下步骤：获取场景的计算机断层扫描（CT）图像数据; 使用基于CT图像数据的射线投射来渲染场景的3D图像; 基于固定的2D传递函数从3D图像中去除透明区域; 并在3D图像中标记目标。

公开(公告)号：US20250095240A1

公开(公告)日：2025-03-20

申请号：US18570387

申请日：2023-08-31

Applicant: NUCTECH COMPANY LIMITED ,  TSINGHUA UNIVERSITY

Inventor： Zhiqiang CHEN ,  Li ZHANG ,  Hu TANG ,  Yunda SUN ,  Xin JIN ,  Zhenhua ZHAO ,  Le SHEN

IPC: G06T11/00 ,  A61B6/00 ,  G06T5/50 ,  G06T7/11

Abstract: A static CT apparatus and an imaging method for the same are provided. The imaging method includes: acquiring initial projection data of an inspected object at different angles by using a distributed ray source and a detector, where the initial projection data includes projection data that is directly obtained by the detector based on the rays emitted from a plurality of ray source points; obtaining a first CT image using a reconstruction algorithm according to the acquired initial projection data; dividing the first CT image into N first sub-images, where N is a positive integer greater than or equal to 1, and a union of the N first sub-images covers the entire first CT image; optimizing the N first sub-images to obtain N second sub-images; and merging the N second sub-images to obtain a second CT image.

公开(公告)号：US20250045984A1

公开(公告)日：2025-02-06

申请号：US18722485

申请日：2022-10-24

Applicant: NUCTECH COMPANY LIMITED ,  Tsinghua University

Inventor： Li ZHANG ,  Zhiqiang CHEN ,  Yunda SUN ,  Xinbin LI ,  Zhenhua ZHAO ,  Tiao ZHAO ,  Xin JIN

IPC: G06T11/00 ,  G01N23/046

Abstract: A calibration assembly, including: a base; and a plurality of calibration wires dispersedly connected to the base. An absorption capacity of the calibration wire for X rays is greater than that of the base for X rays. Through a specific structure design of a plurality of calibration wires in the calibration assembly, the calibration wires are dispersedly connected to the base, and taking advantage of the characteristics that the absorption capacity of the calibration wire for X rays is greater than that of the base for X rays, the calibration wires are applied to the calibration phantom, and the calibration phantom is scanned in the scanning system. By continuously adjusting the geometric parameter values in the imaging method, the optimal geometric parameter values that are closest to the real scanning system structure may be obtained, thereby improving the imaging effect of the scanning system.

公开(公告)号：US20240410838A1

公开(公告)日：2024-12-12

申请号：US18698356

申请日：2022-09-29

Applicant: NUCTECH COMPANY LIMITED

Inventor： Zhiqiang CHEN ,  Li ZHANG ,  Qingping HUANG ,  Xin JIN ,  Ming CHANG ,  Mingzhi HONG ,  Liguo ZHANG

IPC: G01N23/046

Abstract: An inspection device includes: an inspection channel, through which the object enters and exits the inspection device; an imaging system, including a radiation source used to generate a ray, the radiation source is disposed on one side of the inspection channel, and the ray at least forms a main beam surface applicable to scan and inspect the object; and a detector used to receive the ray passing through the object, the detector is disposed on the other side of the inspection channel to form an inspection region between the radiation source and the detector; and a posture adjustment structure disposed in the inspection region and used to adjust a posture of the object in the inspection region. The object has an inspection surface. The posture adjustment structure may adjust the posture of the object, so that the inspection surface and the main beam surface are in the same plane.