公开(公告)号：US07672427B2

公开(公告)日：2010-03-02

申请号：US11545255

申请日：2006-10-10

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

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

IPC分类号： G01N23/04

CPC分类号： G01N23/04 ,  A61B6/027

摘要： It is disclosed an imaging system comprising: radiation generating means including at least one radiation source for generating radiations; data acquiring means including an detector matrix faced the radiation source for obtaining projection data by receiving radiations penetrated through an object to be inspected; transporting means for making the object to be inspected between the radiation source and the detector matrix linearly moving relative to the radiation source and the detector matrix; and controlling and image processing means for controlling the radiation generating means, the data acquiring means and the transporting means, and for reconstructing an image of the object to be inspected from the projection data. The imaging system according to the present invention achieves a real stereoscopic radiography by using straight-line trajectory scan and reconstructing a tomographic or stereoscopic image through a straight-line filtered back-projection algorithm. The present imaging system has advantages of fast examination speed, no rotation, and out of large cone-angle problem in a circular-orbit cone-beam CT.

摘要翻译： 公开了一种成像系统，包括：辐射发生装置，其包括用于产生辐射的至少一个辐射源; 数据获取装置，包括面向辐射源的检测器矩阵，用于通过接收穿过待检查对象的辐射来获得投影数据; 用于使所述物体在所述辐射源和所述检测器矩阵之间相对于所述辐射源和所述检测器矩阵线性移动的传送装置; 以及控制和图像处理装置，用于控制辐射发生装置，数据获取装置和传送装置，并用于从投影数据重建待检查对象的图像。 根据本发明的成像系统通过使用直线轨迹扫描并通过直线过滤的反投影算法重建断层摄影或立体图像来实现真正的立体放射照相。 本发明的成像系统在圆锥轨道锥形CT中具有检测速度快，无旋转和大锥角问题的优点。

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：US20090010387A1

公开(公告)日：2009-01-08

申请号：US12165846

申请日：2008-07-01

申请人： Kejun Kang ,  Zhiqiang Chen ,  Yuanjing Li ,  Liming Wang ,  Yinong Liu ,  Shangmin Sun ,  Li Zhang ,  Yaohong Liu ,  Guang Yang ,  Qingjun Zhang ,  Wenguo Liu ,  Siyuan Liang ,  Zhenbin Guo ,  Bin Hu ,  Yanli Deng ,  Yucheng Wu

发明人： Kejun Kang ,  Zhiqiang Chen ,  Yuanjing Li ,  Liming Wang ,  Yinong Liu ,  Shangmin Sun ,  Li Zhang ,  Yaohong Liu ,  Guang Yang ,  Qingjun Zhang ,  Wenguo Liu ,  Siyuan Liang ,  Zhenbin Guo ,  Bin Hu ,  Yanli Deng ,  Yucheng Wu

IPC分类号： G01N23/04

CPC分类号： G01N23/04

摘要： The present invention discloses an radiation imaging system, comprising: an accelerator for generating rays which penetrate through the objects to be inspected and an synchronous signal; a detector with a plurality of detecting modules, adapted for detecting rays; a signal processor for generating a selection signal according to the synchronous signal, so as to select a detecting module for detecting the rays; a data converter for converting the signal detected by said detecting module into digital data, and then buffering the digital data in said signal processor; and a communication controller connected to an image processor, adapted for transmitting the digital data buffered in said signal processor to said image processor. The system according to the present invention allows high-speed and stable data acquisition and data conversion and accurate and reliable data transmission, when the data amount is significant.

摘要翻译： 本发明公开了一种辐射成像系统，包括：用于产生穿过待检查物体的射线的加速器和同步信号; 具有多个检测模块的检测器，适于检测射线; 信号处理器，用于根据同步信号产生选择信号，以便选择用于检测光线的检测模块; 数据转换器，用于将由所述检测模块检测的信号转换为数字数据，然后在所述信号处理器中缓冲数字数据; 以及连接到图像处理器的通信控制器，适于将缓冲在所述信号处理器中的数字数据发送到所述图像处理器。 当数据量显着时，根据本发明的系统允许高速稳定的数据采集和数据转换以及准确可靠的数据传输。

公开(公告)号：US07424089B2

公开(公告)日：2008-09-09

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

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：US06922461B2

公开(公告)日：2005-07-26

申请号：US10774366

申请日：2004-02-10

申请人： Kejun Kang ,  Wenhuan Gao ,  Jianmin Li ,  Zhiqiang Chen ,  Yinong Liu ,  Yuanjing Li ,  Chuanxiang Tang ,  Junli Li ,  Li Zhang ,  Jianjun Su ,  Rongxuan Liu

发明人： Kejun Kang ,  Wenhuan Gao ,  Jianmin Li ,  Zhiqiang Chen ,  Yinong Liu ,  Yuanjing Li ,  Chuanxiang Tang ,  Junli Li ,  Li Zhang ,  Jianjun Su ,  Rongxuan Liu

IPC分类号： G01N1/00 ,  G01N23/04 ,  G01V5/00 ,  G01N23/00

CPC分类号： G01V5/0016 ,  G01N23/04

摘要： An inspection system for air cargoes, in which an accelerator, a collimator, and a vertical detector arm are all mounted on the floor; detectors are provided within both the horizontal detector arm and the vertical arm; the accelerator, the collimator, the horizontal detector arm and the vertical detector arm are provided in a same plane; the horizontal detector arm is supported by the upper end of the collimator, the vertical detector arm and the horizontal detector arm are connected to each other and provided in the side opposite to the accelerator; a stable portal-shaped frame is formed by means of the collimator, the horizontal detector arm and the vertical detector arm; the conveying device is located under the horizontal detector arm, being perpendicular to the portal-shaped frame, the collimator is provided between the conveying device and the frame.

摘要翻译： 空中货物的检查系统，其中加速器，准直器和垂直检测器臂都安装在地板上; 检测器设置在水平检测器臂和垂直臂之间; 加速器，准直仪，水平检测器臂和垂直检测器臂设置在同一平面中; 水平检测器臂由准直器的上端支撑，垂直检测臂和水平检测臂彼此连接并设置在与加速器相对的一侧; 通过准直仪，水平检测器臂和垂直检测器臂形成稳定的门形框架; 输送装置位于水平检测器臂下方，垂直于门形框架，准直器设置在输送装置和框架之间。

公开(公告)号：US20120140874A1

公开(公告)日：2012-06-07

申请号：US13322696

申请日：2009-12-30

申请人： Liang Li ,  Zhiqiang Chen ,  Li Zhang ,  Kejun Kang ,  Yuanjing Li ,  Yinong Liu ,  Yuxiang Xing ,  Ziran Zhao

发明人： Liang Li ,  Zhiqiang Chen ,  Li Zhang ,  Kejun Kang ,  Yuanjing Li ,  Yinong Liu ,  Yuxiang Xing ,  Ziran Zhao

IPC分类号： A61B6/03 ,  A61B6/08

CPC分类号： A61B6/032 ,  A61B6/06 ,  A61B6/4452 ,  A61B6/469 ,  G06T11/006 ,  G06T2211/416 ,  G06T2211/421 ,  G06T2211/424

摘要： The present invention discloses a method for performing CT imaging on a region of interest of an object under examination, comprising: acquiring the CT projection data of the region of interest; acquiring the CT projection data of region B; selecting a group of PI line segments covering the region of interest, and calculating the reconstruction image value for each PI line segment in the group; and combining the reconstruction image values in all the PI line segments to obtain the image of the region of interest. The present invention further discloses a CT imaging device using this method and a data processor therein. Since the 2D/3D slice image of the region of interest can be exactly reconstructed and obtained as long as the X-ray beam covers the region of interest and the region B, it is possible to use a small-sized detector to perform CT imaging on the region of interest at any position of a large-sized object, which reduces to a great extent the radiation dose of the X-ray during the CT scanning.

摘要翻译： 本发明公开了一种对被检查物体的感兴趣区域进行CT成像的方法，包括：获取感兴趣区域的CT投影数据; 获取区域B的CT投影数据; 选择覆盖感兴趣区域的一组PI线段，并计算组中每个PI线段的重建图像值; 并且将所有PI线段中的重建图像值组合以获得感兴趣区域的图像。 本发明还公开了一种使用该方法的CT成像装置及其中的数据处理器。 由于只要X射线束覆盖感兴趣区域和区域B，就可以精确地重构和获得感兴趣区域的2D / 3D切片图像，因此可以使用小尺寸检测器来执行CT成像 在大尺寸物体的任何位置处的感兴趣区域，其在CT扫描期间在很大程度上降低X射线的辐射剂量。

公开(公告)号：US08039803B2

公开(公告)日：2011-10-18

申请号：US12920161

申请日：2009-02-16

申请人： Kejun Kang ,  Zhiqiang Chen ,  Li Zhang ,  Yingxin Wang ,  Ziran Zhao ,  Yuanjing Li ,  Yinong Liu ,  Zhifeng Huang ,  Yuxiang Xing

发明人： Kejun Kang ,  Zhiqiang Chen ,  Li Zhang ,  Yingxin Wang ,  Ziran Zhao ,  Yuanjing Li ,  Yinong Liu ,  Zhifeng Huang ,  Yuxiang Xing

IPC分类号： G01J5/02

CPC分类号： G01N21/3581

摘要： A method for phase contrast imaging comprises: illuminating an object by terahertz radiation such that the terahertz radiation interacts with the object; illuminating a diffraction grating by the terahertz radiation that has interacted with the object; translating the diffraction grating along the direction of the grating wave vector, to measure, for each of different grating positions, an intensity distribution of the terahertz radiation that has interacted with the object and with the grating in a diffraction field; and retrieving a phase contrast image of the object from the intensity distributions. An apparatus for phase contrast imaging is also provided.

摘要翻译： 一种用于相位对比成像的方法包括：用太赫兹辐射照射物体，使得太赫兹辐射与物体相互作用; 用与物体相互作用的太赫兹辐射照射衍射光栅; 沿着光栅波矢的方向平移衍射光栅，以测量每个不同的光栅位置，在衍射场中与物体和光栅相互作用的太赫兹辐射的强度分布; 以及从所述强度分布中检索所述对象的相位对比图像。 还提供了一种用于相位成像的装置。

公开(公告)号：US20090129544A1

公开(公告)日：2009-05-21

申请号：US12270908

申请日：2008-11-14

申请人： Zhiqiang Chen ,  Li Zhang ,  Kejun Kang ,  Xuewu Wang ,  Qingping Huang ,  Yuanjing Li ,  Yinong Liu ,  Ziran Zhao ,  Yongshun Xiao

发明人： Zhiqiang Chen ,  Li Zhang ,  Kejun Kang ,  Xuewu Wang ,  Qingping Huang ,  Yuanjing Li ,  Yinong Liu ,  Ziran Zhao ,  Yongshun Xiao

IPC分类号： G01N23/04

CPC分类号： G01N23/04 ,  G01N23/087 ,  G01N2223/423

摘要： A method for substance identification and an apparatus thereof are disclosed. The method comprises comprising steps of: transmitting an object under inspection using high-energy rays and low-energy rays, so as to obtain a high-energy transmission image and a low-energy transmission image for the object, wherein a value of each pixel in the high-energy image indicates a high-energy transparency of the high-energy rays with respect to corresponding parts of the object, and a value of each pixel in the low-energy image indicates a low-energy transparency of the low-energy rays with respect to corresponding parts of the object; calculating a value of a first function for the high-energy transparency and a value of a second function for the high-energy transparency and the low-energy transparency, for each pixel; and classifying locations determined by the value of the first function and the value of the second function using a pre-created classification curve, so as to identify the type of the substance of a part of the object corresponding to each pixel. With the present invention, it is possible to not only obtain a transmission image of the object, but also obtain material information in the object.

摘要翻译： 公开了一种物质识别方法及其装置。 该方法包括以下步骤：使用高能射线和低能射线发射被检查物体，以获得该物体的高能透射图像和低能透射图像，其中每个像素的值 在高能量图像中表示高能量射线相对于物体的相应部分的高能量透明度，并且低能量图像中的每个像素的值表示低能量透射度的低能量 相对于物体的相应部分的射线; 对于每个像素，计算用于高能量透明度的第一函数的值和用于高能量透明度和低能量透明度的第二函数的值; 以及使用预先创建的分类曲线对由第一函数的值和第二函数的值确定的位置进行分类，以便识别与每个像素对应的对象的一部分的实体的类型。 利用本发明，不仅可以获得对象的发送图像，而且可以获得对象中的素材信息。

公开(公告)号：US08731268B2

公开(公告)日：2014-05-20

申请号：US13142725

申请日：2010-12-27

申请人： Liang Li ,  Zhiqiang Chen ,  Li Zhang ,  Kejun Kang ,  Yuanjing Li ,  Ziran Zhao ,  Yinong Liu ,  Yuxiang Xing ,  Xin Jin

发明人： Liang Li ,  Zhiqiang Chen ,  Li Zhang ,  Kejun Kang ,  Yuanjing Li ,  Ziran Zhao ,  Yinong Liu ,  Yuxiang Xing ,  Xin Jin

IPC分类号： G06K9/00

CPC分类号： A61B6/5264 ,  A61B6/032 ,  G06T7/285 ,  G06T11/005 ,  G06T2207/10081 ,  G06T2211/412

摘要： A CT device and method based on motion compensation are proposed. The present invention obtains motion parameters of a target object by using a stereo-vision-based motion measurement system, and then implements motion compensation through the technology based on reconstructed image matrix transformation, thereby obtaining a clear 2D/3D CT image while eliminating motion artifacts. The present invention can effectively eliminate motion artifacts caused by the scanned object's own motions in the CT scanning, and can be easily embedded into the existing CT scanning equipments. The present invention can improve quality of the CT images, and is especially important for CT imaging of some special groups of people that can not control their own motions, such as Parkinson's patients, infants, living mouse and so on. It can also improve ultra-high-resolution imaging of human body.

摘要翻译： 提出了一种基于运动补偿的CT装置和方法。 本发明通过使用基于立体视觉的运动测量系统获得目标对象的运动参数，然后通过基于重构图像矩阵变换的技术实现运动补偿，从而获得清晰的2D / 3D CT图像，同时消除运动伪影 。 本发明能够有效地消除CT扫描中被扫描物体自身运动引起的运动伪影，并且可以容易地嵌入现有的CT扫描设备中。 本发明可以提高CT图像的质量，对于一些不能控制自己的运动的特殊人群，如帕金森患者，婴儿，生活小鼠等，对CT成像尤为重要。 它还可以改善人体的超高分辨率成像。

公开(公告)号：US07660387B2

公开(公告)日：2010-02-09

申请号：US12165846

申请日：2008-07-01

申请人： Kejun Kang ,  Zhiqiang Chen ,  Yuanjing Li ,  Liming Wang ,  Yinong Liu ,  Shangmin Sun ,  Li Zhang ,  Yaohong Liu ,  Guang Yang ,  Qingjun Zhang ,  Wenguo Liu ,  Siyuan Liang ,  Zhenbin Guo ,  Bin Hu ,  Yanli Deng ,  Yucheng Wu

发明人： Kejun Kang ,  Zhiqiang Chen ,  Yuanjing Li ,  Liming Wang ,  Yinong Liu ,  Shangmin Sun ,  Li Zhang ,  Yaohong Liu ,  Guang Yang ,  Qingjun Zhang ,  Wenguo Liu ,  Siyuan Liang ,  Zhenbin Guo ,  Bin Hu ,  Yanli Deng ,  Yucheng Wu

IPC分类号： G01N23/04

CPC分类号： G01N23/04

摘要： The present invention discloses an radiation imaging system, comprising: an accelerator for generating rays which penetrate through the objects to be inspected and an synchronous signal; a detector with a plurality of detecting modules, adapted for detecting rays; a signal processor for generating a selection signal according to the synchronous signal, so as to select a detecting module for detecting the rays; a data converter for converting the signal detected by said detecting module into digital data, and then buffering the digital data in said signal processor; and a communication controller connected to an image processor, adapted for transmitting the digital data buffered in said signal processor to said image processor. The system according to the present invention allows high-speed and stable data acquisition and data conversion and accurate and reliable data transmission, when the data amount is significant.

摘要翻译： 本发明公开了一种辐射成像系统，包括：用于产生穿过待检查物体的射线的加速器和同步信号; 具有多个检测模块的检测器，适于检测射线; 信号处理器，用于根据同步信号产生选择信号，以便选择用于检测光线的检测模块; 数据转换器，用于将由所述检测模块检测的信号转换为数字数据，然后在所述信号处理器中缓冲数字数据; 以及连接到图像处理器的通信控制器，适于将缓冲在所述信号处理器中的数字数据发送到所述图像处理器。 当数据量显着时，根据本发明的系统允许高速稳定的数据采集和数据转换以及准确可靠的数据传输。