公开(公告)号：US07400706B2

公开(公告)日：2008-07-15

申请号：US11285395

申请日：2005-11-23

申请人： Yulan Li ,  Haifeng Hu ,  Yinong Liu ,  Zhiqiang Chen ,  Kejun Kang ,  Li Zhang ,  Wanlong Wu ,  Yuanjing Li ,  Yi Wang ,  Wenjun He ,  Mingrui Qi

发明人： Yulan Li ,  Haifeng Hu ,  Yinong Liu ,  Zhiqiang Chen ,  Kejun Kang ,  Li Zhang ,  Wanlong Wu ,  Yuanjing Li ,  Yi Wang ,  Wenjun He ,  Mingrui Qi

IPC分类号： G01N23/203

CPC分类号： G01N23/20066 ,  G01N23/203 ,  G01N2223/637 ,  G01V5/0025

摘要： A method and an apparatus for liquid safety-detection by backscattering with a radiation source are provided that relate to a radiation detecting technology field. The invention comprises using a radiation source, a collimator, a detector, a data collector and a computer data processor, and has the main steps of: 1) placing a liquid article to be detected onto a rotatable platform; 2) emitting a ray from the radiation source, said ray causing Compton scattering at the surface of the liquid after passing through the package layer of the liquid article; 3) the scattering photons being received by the detector after passing the collimator; 4) the detector transmitting the received data to the data collector; and 5) the data collector transmitting the amplified and shaped data to the computer data processor, which processes the data to obtain the liquid density of the detected article, then compares the result with the densities of dangerous articles in a current database, and gives a warning if the density of the detected article is consistent with that of a dangerous article. Compared to the prior art, the invention is convenient to use, detects rapidly and accurately, has a strong anti-interference, is very safe and reliable to use, and protection is easy.

摘要翻译： 提供了一种与放射线检测技术领域相关的用于利用辐射源的后向散射进行液体安全检测的方法和装置。 本发明包括使用辐射源，准直仪，检测器，数据采集器和计算机数据处理器，并且具有以下主要步骤：1）将要检测的液体物品放置在可旋转平台上; 2）从辐射源发射光线，所述光线在通过液体物品的包装层之后在液体表面引起康普顿散射; 3）散射光子在通过准直仪之后被检测器接收; 4）检测器将接收的数据发送到数据采集器; 5）数据收集器将放大和成形的数据传送到计算机数据处理器，处理数据以获得检测到的物品的液体密度，然后将结果与当前数据库中危险物品的密度进行比较，并给出 如果检测到的物品的密度与危险物品的密度一致，则警告。 与现有技术相比，本发明使用方便，检测快速准确，抗干扰性强，使用安全可靠，保护容易。

公开(公告)号：US07330534B2

公开(公告)日：2008-02-12

申请号：US11523745

申请日：2006-09-19

申请人： Yulan Li ,  Yuanjing Li ,  Zhiqiang Chen ,  Yinong Liu ,  Qitian Miao ,  Wanlong Wu ,  Ziran Zhao ,  Xilei Luo ,  Li Zhang ,  Bin Sang ,  Hailin Wang

发明人： Yulan Li ,  Yuanjing Li ,  Zhiqiang Chen ,  Yinong Liu ,  Qitian Miao ,  Wanlong Wu ,  Ziran Zhao ,  Xilei Luo ,  Li Zhang ,  Bin Sang ,  Hailin Wang

IPC分类号： G21K1/00 ,  G21K1/02 ,  G21K1/04

CPC分类号： G21K1/025 ,  G21K1/04 ,  G21K5/04

摘要： The present invention discloses a ray beam guiding apparatus, comprising a ray beam guiding box having substantially fan-shaped top and bottom surfaces, defining an inner space, and having open wide and narrow ends; an engaging member joined to the narrow end of the box; a first collimator mounted to the box adjacent to the narrow end for adjusting size/shape of the ray beam in horizontal vertical direction; a second collimator having a calibration slit or grill and mounted to the box adjacent to the wide end; and an adjusting member connecting the engaging member and a ray generator to adjust a distance therebetween. The box can adjust size/shape and centering of the ray beam, so that inspection quality can be improved and thickness of the ray shielding layer can be reduced, the box is applicable to a ray inspection system which performs security inspection of liquid articles.

摘要翻译： 本发明公开了一种射线束引导装置，包括具有大致扇形的顶面和底面的光束引导盒，其限定内部空间，并具有开口的宽而窄的端部; 接合到箱的窄端的接合构件; 安装在与窄端相邻的箱体上的第一准直器，用于调节水平垂直方向上的射线束的尺寸/形状; 具有校准狭缝或格栅的第二准直器，并且安装到与所述宽端相邻的所述箱体; 以及调节构件，其连接所述接合构件和射线发生器以调节它们之间的距离。 该盒子可以调节射线束的尺寸/形状和对中，从而可以提高检查质量，并且可以减小射线屏蔽层的厚度，该盒子适用于进行液体物品的安全检查的射线检查系统。

公开(公告)号：US20070116175A1

公开(公告)日：2007-05-24

申请号：US11546717

申请日：2006-10-12

申请人： Li Zhang ,  Hewei Gao ,  Zhiqiang Chen ,  Kejun Kang ,  Jianping Cheng ,  Yuanjing Li ,  Yinong Liu ,  Yuxiang Xing ,  Ziran Zhao ,  Yongshun Xiao

发明人： Li Zhang ,  Hewei Gao ,  Zhiqiang Chen ,  Kejun Kang ,  Jianping Cheng ,  Yuanjing Li ,  Yinong Liu ,  Yuxiang Xing ,  Ziran Zhao ,  Yongshun Xiao

IPC分类号： H05G1/60 ,  A61B6/00 ,  G01N23/00 ,  G21K1/12

CPC分类号： G01N23/046 ,  A61B6/032 ,  G01N2223/3303 ,  G01N2223/419 ,  G06T11/006 ,  G06T2211/421

摘要： It is disclosed a system and a method for reconstructing an image by using a straight-line trajectory scan to avoid image spatial resolution reduction due to interpolations in angular direction and detector direction during data rebinning. This system comprises: a projection data conversion section for converting projection data from straight-line trajectory scan into projection data under quasi-parallel-beam scan; a filtration section for obtaining filtered projection data by convoluting the projection data under quasi-parallel-beam scan with a predetermined convolutional kernel; and a back-projection section for reconstructing an image by back-projecting the filtered projection data with a weighting factor. By using the inventive system and method, the spatial resolution in the reconstructed image is improved, and the influence of data truncation on the reconstructed image is reduced. The present invention applies the filtration and back-projection mode, and thus has general advantages of the filtration and back projection, such as simplicity and efficiency. And it is easy to be parallelized and accelerated.

摘要翻译： 公开了一种通过使用直线轨迹扫描来重建图像的系统和方法，以避免在数据重组期间由于在角度方向和检测器方向上的内插而导致的图像空间分辨率降低。 该系统包括：投影数据转换部分，用于将投影数据从直线轨迹扫描转换成准并行束扫描的投影数据; 过滤部分，用于通过用预定的卷积核在准平行束扫描下卷积投影数据来获得经滤波的投影数据; 以及背投影部分，用于通过用加权因子反投影过滤的投影数据来重建图像。 通过使用本发明的系统和方法，改善了重建图像中的空间分辨率，减少了数据截断对重建图像的影响。 本发明应用过滤和反投影模式，因此具有过滤和反投影的一般优点，例如简单性和效率。 并行并行加速很容易。

公开(公告)号：US20070064875A1

公开(公告)日：2007-03-22

申请号：US11523745

申请日：2006-09-19

申请人： Yulan Li ,  Yuanjing Li ,  Zhiqiang Chen ,  Yinong Liu ,  Qitian Miao ,  Wanlong Wu ,  Ziran Zhao ,  Xilei Luo ,  Li Zhang ,  Bin Sang ,  Hailin Wang

发明人： Yulan Li ,  Yuanjing Li ,  Zhiqiang Chen ,  Yinong Liu ,  Qitian Miao ,  Wanlong Wu ,  Ziran Zhao ,  Xilei Luo ,  Li Zhang ,  Bin Sang ,  Hailin Wang

IPC分类号： G21K1/02

CPC分类号： G21K1/025 ,  G21K1/04 ,  G21K5/04

摘要： The present invention discloses a ray beam guiding apparatus, comprising a ray beam guiding box having substantially fan-shaped top and bottom surfaces, defining an inner space, and having open wide and narrow ends; an engaging member joined to the narrow end of the box; a first collimator mounted to the box adjacent to the narrow end and adapted to adjust size/shape of the ray beam in horizontal vertical direction; a second collimator having a calibration slit or grill and mounted to the box adjacent to the wide end; and an adjusting member connecting the engaging member and a ray generator to adjust a distance therebetween. The box can adjust size/shape and centering of the ray beam, so that inspection quality can be improved and thickness of the ray shielding layer can be reduced, the box is applicable to a ray inspection system which performs security inspection of liquid articles.

摘要翻译： 本发明公开了一种射线束引导装置，包括具有大致扇形的顶面和底面的光束引导盒，其限定内部空间，并具有开口的宽而窄的端部; 接合到箱的窄端的接合构件; 第一准直器，其安装在与窄端相邻的箱体上，并适于在水平垂直方向上调节射线束的尺寸/形状; 具有校准狭缝或格栅的第二准直器，并且安装到与所述宽端相邻的所述箱体; 以及调节构件，其连接所述接合构件和射线发生器以调节它们之间的距离。 该盒子可以调节射线束的尺寸/形状和对中，从而可以提高检查质量，并且可以减小射线屏蔽层的厚度，该盒子适用于进行液体物品的安全检查的射线检查系统。

公开(公告)号：US20060115044A1

公开(公告)日：2006-06-01

申请号：US11285398

申请日：2005-11-23

申请人： Wanlong Wu ,  Haifeng Hu ,  Yuanjing Li ,  Zhiqiang Chen ,  Kejun Kang ,  Yulan Li ,  Li Zhang ,  Yinong Liu ,  Xuewu Wang ,  Bin Sang ,  Hailin Wang

发明人： Wanlong Wu ,  Haifeng Hu ,  Yuanjing Li ,  Zhiqiang Chen ,  Kejun Kang ,  Yulan Li ,  Li Zhang ,  Yinong Liu ,  Xuewu Wang ,  Bin Sang ,  Hailin Wang

IPC分类号： G01N23/04

CPC分类号： G01V5/0016 ,  G01N9/24 ,  G01N23/10

摘要： A method and an apparatus for liquid safety-detection with a radiation source relate to a radiation detecting technology field. The main steps of the method of the invention are: an article to be detected being conveyed into an operation zone within a radiation shield field; the ray emitted from a radiation source passing through the article to be detected, and being received by a detector; the detector transmitting the received ray signal to a data collector; the data collector amplifying and forming the ray signal, and transmitting such data and the data collected by thickness measuring probing heads to a data processing computer; and the data processing computer processing the two groups of data to derive the density and atomic number of the detected liquid, comparing the result with the densities and atomic numbers of dangerous articles in a existing database, and displaying the detected information of the detected article. Comparing to the prior art, the invention is not subjected to the affection of the outside package of an article and has great anti-interference, and has the features of small volume, high accuracy of detection, easy shielding, and high use safety and reliability.

摘要翻译： 用于具有辐射源的液体安全检测的方法和装置涉及辐射检测技术领域。 本发明方法的主要步骤是：被检测物品被传送到辐射屏蔽场内的操作区域; 从通过要检测的物品的辐射源发出的射线并被检测器接收; 所述检测器将所接收的射线信号发送到数据收集器; 数据收集器放大并形成射线信号，并将这些数据和由厚度测量探测头收集的数据发送到数据处理计算机; 并且数据处理计算机处理两组数据以导出检测到的液体的密度和原子序数，将结果与现有数据库中的危险物品的密度和原子数进行比较，并显示检测到的物品的检测信息。 与现有技术相比，本发明不受制品外包装的影响，抗干扰性强，具有体积小，检测精度高，屏蔽方便，使用安全可靠的特点 。

公开(公告)号：US08306180B2

公开(公告)日：2012-11-06

申请号：US12509977

申请日：2009-07-27

申请人： Li Zhang ,  Zhiqiang Chen ,  Kejun Kang ,  Haifeng Hu ,  Yuxiang Xing ,  Xinhui Duan ,  Yuanjing Li ,  Yinong Liu ,  Qingping Huang

发明人： Li Zhang ,  Zhiqiang Chen ,  Kejun Kang ,  Haifeng Hu ,  Yuxiang Xing ,  Xinhui Duan ,  Yuanjing Li ,  Yinong Liu ,  Qingping Huang

IPC分类号： A61B6/00 ,  G01N23/04

CPC分类号： G01V5/005 ,  G01V5/0041

摘要： Disclosed is an image reconstruction method in a high-energy dual-energy CT system. The method comprises steps of scanning an objection with high-energy dual-energy rays to obtain high-energy dual-energy projection values, calculating projection values of base material coefficients corresponding to the dual-energy projection values on the basis of a pre-created lookup table or by analytically solving a set of equations, and obtaining an image of base material coefficient distribution based on the projection values of base material coefficients. The method provides a solution for reconstruction with high-energy dual energy CT technology and thus a more effective approach for substance identification and contraband inspection, thereby bringing a significant improvement on accuracy and efficiency in security inspection.

摘要翻译： 公开了一种高能双能CT系统中的图像重建方法。 该方法包括以高能双能量射线扫描异物以获得高能双能量投影值的步骤，基于预先创建的计算来计算对应于双能量投影值的基材系数的投影值 查找表或通过分析求解一组方程，并且基于基材系数的投影值获得基材系数分布的图像。 该方法为高能双能CT技术的重建提供了解决方案，是物质识别和违禁检测的有效途径，从而大大提高了安全检测的准确性和效率。

公开(公告)号：US08107068B2

公开(公告)日：2012-01-31

申请号：US12492253

申请日：2009-06-26

申请人： Zhiqiang Chen ,  Li Zhang ,  Yuanjing Li ,  Yinong Liu ,  Ziran Zhao ,  Mingliang Li ,  Hongfeng Gai ,  Hongqiu Wang ,  Dongmei Yu

发明人： Zhiqiang Chen ,  Li Zhang ,  Yuanjing Li ,  Yinong Liu ,  Ziran Zhao ,  Mingliang Li ,  Hongfeng Gai ,  Hongqiu Wang ,  Dongmei Yu

IPC分类号： G01J3/44

CPC分类号： G01J3/44 ,  G01J3/0264 ,  G01J3/027 ,  G01J3/0291 ,  G01J3/28 ,  G01N21/65 ,  Y10S707/99933

摘要： The present invention relates to a Raman spectroscopy system that includes a detection center. The detection center includes at least one light source for outputting exciting light which excites a detected object to generate Raman scattered light, and an analysis device for obtaining the Raman spectroscopy of the detected object. The Raman spectroscopy system further includes at least one detection terminal, each of which includes at least one Raman probe that each introduces the exciting light to the detected object, collects the Raman scattered light generated by the detected object, and returns said Raman scattered light to the detection center. The present invention also relates to a method for detecting Raman spectroscopy.

摘要翻译： 本发明涉及一种包括检测中心的拉曼光谱系统。 检测中心包括至少一个用于输出激发被检测物体以产生拉曼散射光的激发光的光源，以及用于获得被检测物体的拉曼光谱的分析装置。 拉曼光谱系统还包括至少一个检测端子，每个检测端子包括至少一个拉曼探针，每个拉曼探头将所激发的光引导到被检测物体，收集被检测物体产生的拉曼散射光，并将所述拉曼散射光返回 检测中心。 本发明还涉及一种用于检测拉曼光谱的方法。

公开(公告)号：US07881424B2

公开(公告)日：2011-02-01

申请号：US12075463

申请日：2008-03-11

申请人： Li Zhang ,  Zhiqiang Chen ,  Gnowei Zhang ,  Jianping Cheng ,  Yuanjing Li ,  Yinong Liu ,  Yuxiang Xing ,  Ziran Zhao ,  Yongshun Xiao

发明人： Li Zhang ,  Zhiqiang Chen ,  Gnowei Zhang ,  Jianping Cheng ,  Yuanjing Li ,  Yinong Liu ,  Yuxiang Xing ,  Ziran Zhao ,  Yongshun Xiao

IPC分类号： G01N23/00

CPC分类号： G01T7/005 ,  G01T1/1648

摘要： A method for calibrating a dual-energy CT system and an image reconstruction method are disclosed to calculate images of atomic number and density of a scanned object as well as its attenuation coefficient images at any energy level. The present invention removes the effect from a cupping artifact due to X-ray beam hardening. The method for calibrating a dual-energy CT system is provided comprising steps of selecting at least two different materials, detecting penetrative rays from dual-energy rays penetrating said at least two different materials under different combinations of thickness to acquire projection values, and creating a lookup table in a form of correspondence between said different combinations of thickness and said projection values. The image reconstruction method is provided comprising steps of scanning an object with dual-energy rays to acquire dual-energy projection values, calculating projection values of base material coefficients corresponding to said dual-energy projection values based on a pre-created lookup table, and reconstructing an image of base material coefficient distribution based on said projection values of base material coefficients. In this way, images of atomic number and density of an object as well as its attenuation coefficient images can be calculated from the images of the distribution of base material coefficients. Compared with the prior art technique, the method proposed in the present invention has advantages of simple calibration procedure, high calculation precision and invulnerability to X-ray beam hardening.

摘要翻译： 公开了用于校准双能量CT系统和图像重建方法的方法，以计算被扫描物体的原子序数和密度以及其在任何能级的衰减系数图像的图像。 本发明消除了由于X射线束硬化引起的拔罐伪影的影响。 提供了一种用于校准双能量CT系统的方法，包括以下步骤：选择至少两种不同的材料，从不同厚度的组合穿透所述至少两种不同材料的双能量射线检测穿透射线，以获得投影值， 以所述不同的厚度组合和所述投影值之间的对应形式的查找表。 提供了图像重建方法，包括以下步骤：用双能量射线扫描物体以获取双能量投影值，基于预先创建的查找表计算与所述双能量投影值相对应的基材系数的投影值，以及 基于所述基材系数的投影值重构基材系数分布的图像。 以这种方式，可以从基材系数分布的图像中计算出物体的原子数和密度以及衰减系数图像的图像。 与现有技术相比，本发明提出的方法具有校准过程简单，计算精度高，X射线束硬化无效的优点。

公开(公告)号：US07508918B2

公开(公告)日：2009-03-24

申请号：US11525692

申请日：2006-09-22

申请人： Yinong Liu ,  Zhiqiang Chen ,  Yuanjing Li ,  Wanlong Wu ,  Yulan Li ,  Xilei Luo ,  Li Zhang ,  Ziran Zhao ,  Bin Sang ,  Hailin Wang

发明人： Yinong Liu ,  Zhiqiang Chen ,  Yuanjing Li ,  Wanlong Wu ,  Yulan Li ,  Xilei Luo ,  Li Zhang ,  Ziran Zhao ,  Bin Sang ,  Hailin Wang

IPC分类号： G21K1/04

CPC分类号： G21K1/04

摘要： A collimator for adjusting an X-ray beam includes: an up-and-down adjustment mechanism; a left-and-right adjustment mechanism, a supporting member; and an adjusting plate connected with the supporting member. The up-and-down adjustment mechanism comprises first rotating nuts, up-and-down moving leading screws threadedly connected with the first rotating nuts, and upper and lower sliding stops located in the supporting member. Each of the leading screws is connected with the upper and lower sliding stops to drive the upper and lower sliding stops, respectively, to vertically move. The left-and-right adjustment mechanism comprises second rotating nuts, horizontally moving leading screws connected with second rotating nuts, and left and right sliding stops located in the supporting member. Each of the horizontally moving leading screws are connected with the left and right sliding stops to drive the left and right sliding stops, respectively, to horizontally move.

摘要翻译： 用于调整X射线束的准直器包括：上下调节机构; 左右调节机构，支撑构件; 以及与支撑构件连接的调节板。 上下调节机构包括第一旋转螺母，与第一旋转螺母螺纹连接的上下移动的引导螺钉，以及位于支撑构件中的上下滑动止动件。 每个前导螺钉与上下滑动止动件连接以分别驱动上下滑动止动件垂直移动。 左右调节机构包括第二旋转螺母，与第二旋转螺母连接的水平移动的导螺杆，以及位于支撑构件中的左右滑动止动件。 每个水平移动的前导螺钉与左右滑动止动件分别连接以驱动左右滑动止动件水平移动。

公开(公告)号：US20080310598A1

公开(公告)日：2008-12-18

申请号：US12075463

申请日：2008-03-11

申请人： Li Zhang ,  Zhiqiang Chen ,  Guowei Zhang ,  Jianping Cheng ,  Yuanjing Li ,  Yinong Liu ,  Yuxiang Xing ,  Ziran Zhao ,  Yongshun Xiao

发明人： Li Zhang ,  Zhiqiang Chen ,  Guowei Zhang ,  Jianping Cheng ,  Yuanjing Li ,  Yinong Liu ,  Yuxiang Xing ,  Ziran Zhao ,  Yongshun Xiao

IPC分类号： G01D18/00 ,  G06K9/00

CPC分类号： G01T7/005 ,  G01T1/1648

摘要： A method for calibrating a dual-energy CT system and an image reconstruction method are disclosed to calculate images of atomic number and density of a scanned object as well as its attenuation coefficient images at any energy level. The present invention removes the effect from a cupping artifact due to X-ray beam hardening. The method for calibrating a dual-energy CT system is provided comprising steps of selecting at least two different materials, detecting penetrative rays from dual-energy rays penetrating said at least two different materials under different combinations of thickness to acquire projection values, and creating a lookup table in a form of correspondence between said different combinations of thickness and said projection values. The image reconstruction method is provided comprising steps of scanning an object with dual-energy rays to acquire dual-energy projection values, calculating projection values of base material coefficients corresponding to said dual-energy projection values based on a pre-created lookup table, and reconstructing an image of base material coefficient distribution based on said projection values of base material coefficients. In this way, images of atomic number and density of an object as well as its attenuation coefficient images can be calculated from the images of the distribution of base material coefficients. Compared with the prior art technique, the method proposed in the present invention has advantages of simple calibration procedure, high calculation precision and invulnerability to X-ray beam hardening.

摘要翻译： 公开了用于校准双能量CT系统和图像重建方法的方法，以计算被扫描物体的原子序数和密度以及其在任何能级的衰减系数图像的图像。 本发明消除了由于X射线束硬化引起的拔罐伪影的影响。 提供了一种用于校准双能量CT系统的方法，包括以下步骤：选择至少两种不同的材料，从不同厚度的组合穿透所述至少两种不同材料的双能量射线检测穿透射线，以获得投影值， 以所述不同的厚度组合和所述投影值之间的对应形式的查找表。 提供了图像重建方法，包括以下步骤：用双能量射线扫描物体以获取双能量投影值，基于预先创建的查找表计算与所述双能量投影值相对应的基材系数的投影值，以及 基于所述基材系数的投影值重构基材系数分布的图像。 以这种方式，可以从基材系数分布的图像中计算出物体的原子数和密度以及衰减系数图像的图像。 与现有技术相比，本发明提出的方法具有校准过程简单，计算精度高，X射线束硬化无效的优点。