公开(公告)号：US07962283B2

公开(公告)日：2011-06-14

申请号：US11644137

申请日：2006-12-22

申请人： Li Zhang ,  Zhiqiang Chen ,  Lijun Wang ,  Zhiming Wang ,  Ziran Zhao ,  Yuxiang Xing ,  Yongshun Xiao ,  Yuanjing Li ,  Yinong Liu

发明人： Li Zhang ,  Zhiqiang Chen ,  Lijun Wang ,  Zhiming Wang ,  Ziran Zhao ,  Yuxiang Xing ,  Yongshun Xiao ,  Yuanjing Li ,  Yinong Liu

IPC分类号： G01C21/30 ,  G01C21/32

CPC分类号： G05D1/0246 ,  G05D2201/0216

摘要： The present invention relates to the deviation-correction system for positioning of moving objects, and discloses a deviation-correction system for positioning of moving objects and the motion-tracking method thereof. The system includes a control system for receiving motion parameters required for deviation-correction, and sending commands to an actuator to control a moving object based on the motion parameters, the deviation-correction system for positioning of moving objects further comprising: a reference object which is set as a specified motion trail for the moving object; an image capturing system for acquiring successive digital image data upon the moving object moves; a motion tracking system for performing a motion tracking algorithm based on the digital image data transmitted by the image capturing system to judge whether the current motion state needs to be corrected and then transmitting the motion parameters required for deviation-correction to the control system.

摘要翻译： 本发明涉及用于移动物体的定位的偏差校正系统，并且公开了用于移动物体的定位的偏差校正系统及其运动跟踪方法。 该系统包括用于接收偏差校正所需的运动参数的控制系统，以及基于运动参数向致动器发送命令以控制运动物体的运动对象的偏移校正系统，还包括：参考对象， 被设置为移动物体的指定运动轨迹; 用于在移动物体移动时获取连续的数字图像数据的图像捕获系统; 运动跟踪系统，用于基于由图像捕获系统发送的数字图像数据执行运动跟踪算法，以判断当前运动状态是否需要被校正，然后向控制系统发送偏差校正所需的运动参数。

公开(公告)号：US20110024624A1

公开(公告)日：2011-02-03

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： H01L31/09 ,  H01L31/0232

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 comprises: a terahertz radiation emitter for generating terahertz radiation, which illuminates an object to interact with the object; a diffraction grating, which is illuminated by the terahertz radiation that has interacted with the object; a terahertz radiation detector for measuring, 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 a data collecting and processing system for retrieving a phase contrast image of the object from the intensity distributions.

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。 用于相位对比成像的装置包括：太赫兹辐射发射器，用于产生太赫兹辐射，其照亮物体与物体相互作用; 衍射光栅，其被与物体相互作用的太赫兹辐射照射; 太赫兹辐射检测器，用于针对每个不同的光栅位置，在衍射场中测量与物体和光栅相互作用的太赫兹辐射的强度分布; 以及用于从强度分布中检索对象的相位对比图像的数据收集和处理系统。

公开(公告)号：US20070116177A1

公开(公告)日：2007-05-24

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：US08831305B2

公开(公告)日：2014-09-09

申请号：US13322242

申请日：2009-12-30

申请人： Li Zhang ,  Zhiqiang Chen ,  Yuanyuan Liu ,  Yuxiang Xing ,  Ziran Zhao

发明人： Li Zhang ,  Zhiqiang Chen ,  Yuanyuan Liu ,  Yuxiang Xing ,  Ziran Zhao

IPC分类号： G06K9/00 ,  G01N23/087 ,  A61B6/03 ,  G06T11/00 ,  A61B6/00

CPC分类号： G01N23/087 ,  A61B6/032 ,  A61B6/4035 ,  A61B6/4241 ,  A61B6/4266 ,  A61B6/482 ,  G01N2223/419 ,  G01N2223/423 ,  G06T11/005 ,  G06T11/008 ,  G06T2211/408

摘要： Pseudo dual-energy material identification systems and methods with under-sampling are disclosed. The system comprises a ray generating device, a mechanic rotation control section, a data collecting subsystem comprising a first tier of detectors and a second tier of detectors, and a master control and data processing computer. The system utilizes a CT-imaging-based material identification method with under-sampled dual-energy projection data, in which only a few detectors at the second tier are used to perform dual-energy projection data sampling, and optimization is made on the procedure of solving an equation system.

摘要翻译： 公开了具有欠采样的伪双能量材料识别系统和方法。 该系统包括射线产生装置，机械旋转控制部分，包括第一层检测器和第二层检测器的数据收集子系统，以及主控制和数据处理计算机。 该系统采用基于CT成像的材料识别方法，采用欠采样双能量投影数据，其中仅使用第二层的几个检测器进行双能量投影数据采样，并对该过程进行优化 求解方程式。

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：US08515002B2

公开(公告)日：2013-08-20

申请号：US13147952

申请日：2010-07-06

申请人： Zhifeng Huang ,  Zhiqiang Chen ,  Li Zhang ,  Zhentian Wang ,  Yuxiang Xing ,  Ziran Zhao ,  Yongshun Xiao

发明人： Zhifeng Huang ,  Zhiqiang Chen ,  Li Zhang ,  Zhentian Wang ,  Yuxiang Xing ,  Ziran Zhao ,  Yongshun Xiao

IPC分类号： A61B6/00

CPC分类号： G01N23/04 ,  B82Y10/00 ,  G01N23/20075 ,  G21K2201/061 ,  G21K2207/005

摘要： An x-ray imaging technology, performing an x-ray dark-field CT imaging of an examined object using an imaging system which comprises an x-ray source, two absorbing gratings G1 and G2, an x-ray detector, a controller and a data processing unit, comprising the steps of: emitting x-rays to the examined object; enabling one of the two absorbing gratings G1 and G2 to perform phase stepping motion within at least one period range thereof; where in each phase stepping step, the detector receives the x-ray and converts it into an electric signal; wherein through the phase stepping of at least one period, the x-ray intensity at each pixel point on the detector is represented as an intensity curve; calculating a second moment of scattering angle distribution for each pixel, based on a contrast of the intensity curve at each pixel point on the detector and an intensity curve without presence of the examined object; taking images of the object at various angles, then obtaining an image with scattering information of the object in accordance with a CT reconstruction algorithm.

摘要翻译： 一种X射线成像技术，使用包括x射线源，两个吸收光栅G1和G2，x射线检测器，控制器和控制器的成像系统对检查对象进行X射线暗场CT成像 数据处理单元，包括以下步骤：向被检查对象发射X射线; 使得两个吸收光栅G1和G2中的一个能够在其至少一个周期范围内执行相位步进运动; 在每个相位步进步骤中，检测器接收x射线并将其转换为电信号; 其中通过至少一个周期的相位步进，将检测器上每个像素点处的x射线强度表示为强度曲线; 基于检测器上的每个像素点处的强度曲线的对比度和不存在检查对象的强度曲线，计算每个像素的散射角分布的第二时刻; 以各种角度拍摄对象的图像，然后根据CT重建算法获得具有对象的散射信息的图像。

公开(公告)号：US20120134531A1

公开(公告)日：2012-05-31

申请号：US13322242

申请日：2009-12-30

申请人： Li Zhang ,  Zhiqiang Chen ,  Yuanyuan Liu ,  Yuxiang Xing ,  Ziran Zhao

发明人： Li Zhang ,  Zhiqiang Chen ,  Yuanyuan Liu ,  Yuxiang Xing ,  Ziran Zhao

IPC分类号： G06K9/34 ,  G01N23/087

CPC分类号： G01N23/087 ,  A61B6/032 ,  A61B6/4035 ,  A61B6/4241 ,  A61B6/4266 ,  A61B6/482 ,  G01N2223/419 ,  G01N2223/423 ,  G06T11/005 ,  G06T11/008 ,  G06T2211/408

摘要： Pseudo dual-energy material identification systems and methods with under-sampling are disclosed. The system comprises a ray generating device, a mechanic rotation control section, a data collecting subsystem comprising a first tier of detectors and a second tier of detectors, and a master control and data processing computer. The system utilizes a CT-imaging-based material identification method with under-sampled dual-energy projection data, in which only a few detectors at the second tier are used to perform dual-energy projection data sampling, and optimization is made on the procedure of solving an equation system.

摘要翻译： 公开了具有欠采样的伪双能量材料识别系统和方法。 该系统包括射线产生装置，机械旋转控制部分，包括第一层检测器和第二层检测器的数据收集子系统，以及主控制和数据处理计算机。 该系统采用基于CT成像的材料识别方法，采用欠采样双能量投影数据，其中仅使用第二层的几个检测器进行双能量投影数据采样，并对该过程进行优化 求解方程式。

公开(公告)号：US20100284514A1

公开(公告)日：2010-11-11

申请号：US12238515

申请日：2008-09-26

申请人： Li Zhang ,  Zhiqiang Chen ,  Xuewu Wang ,  Haifeng Hu ,  Hongxin Wu ,  Yuanjing Li ,  Yinong Liu ,  Ziran Zhao ,  Yuxiang Xing ,  Hu Tang ,  Yumin Yi ,  Jinyu Zhang

发明人： Li Zhang ,  Zhiqiang Chen ,  Xuewu Wang ,  Haifeng Hu ,  Hongxin Wu ,  Yuanjing Li ,  Yinong Liu ,  Ziran Zhao ,  Yuxiang Xing ,  Hu Tang ,  Yumin Yi ,  Jinyu Zhang

IPC分类号： G01N23/06

CPC分类号： G01N9/24 ,  G01V5/00

摘要： Disclosed are a method and a device for security-inspection of liquid articles with dual-energy CT imaging. The method comprises the steps of obtaining one or more CT images including physical attributes of liquid article to be inspected by CT scanning and a dual-energy reconstruction method; acquiring the physical attributes of each liquid article from the CT image; and determining whether the inspected liquid article is dangerous based on the physical attributes. The CT scanning can be implemented by a normal CT scanning technique, or a spiral CT scanning technique. In the normal CT scanning technique, the scan position can be preset, or set by the operator with a DR image, or set by automatic analysis of the DR image.

摘要翻译： 公开了一种用于双能CT成像的液体物品的安全检查方法和装置。 该方法包括以下步骤：通过CT扫描获得包括要检查的液体物品的物理属性的一个或多个CT图像和双能量重建方法; 从CT图像获取每个液体物品的物理属性; 并根据物理属性确定被检液体是否危险。 CT扫描可以通过正常的CT扫描技术或螺旋CT扫描技术来实现。 在正常的CT扫描技术中，扫描位置可以由操作员预先设置，或者通过DR图像设置，或者通过DR图像的自动分析设置。

公开(公告)号：US07689055B2

公开(公告)日：2010-03-30

申请号：US11472193

申请日：2006-06-21

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

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

IPC分类号： G06K9/40

CPC分类号： G06T5/40 ,  G06T5/009 ,  G06T2207/10116 ,  G06T2207/30004

摘要： A method of image information enhancement in radiography relates to image information processing techniques in radiography. The method comprising steps of: normalizing an acquired image A(x,y) to form a normalized image B(x,y); filtering the normalized image B(x,y) by a low-pass filter to obtain an filtered image C(x,y); calculating a relative standard deviation for each pixel in the image A(x,y), three times the relative standard deviation being an edge threshold for each pixel; thresholding a difference image obtained by subtracting the filtered image C(x,y) from the normalized image B(x,y) by using the edge threshold for each pixel to form a threshold-processed image D(x,y); enhancing a contrast of the threshold-processed image D(x,y) by using a non-linear function to form a contrast-enhanced image E(x,y); determining a enhancement coefficient a(x,y); obtaining a edge-enhanced image F(x,y) by multiplying the enhancement coefficient a(x,y), the contrast-enhanced image E(x,y) and the filtered image C(x,y); and generating a resulting image by multiplying a sum of the edge-enhanced image F(x,y) and the filtered image C(x,y) with the maximum value Amax As compared with the prior arts, the inventive method has a fast processing speed for image information enhancement and a simple algorithm, images clearly, eliminates noises in the images, and satisfies the requirements of relatively more enhancement to the contrast of the dark regions in the scanned images.

摘要翻译： 射线照相术中图像信息增强的方法涉及放射照相术中的图像信息处理技术。 该方法包括以下步骤：归一化所获取的图像A（x，y）以形成归一化图像B（x，y）; 通过低通滤波器对归一化图像B（x，y）进行滤波，得到滤波图像C（x，y）; 计算图像A（x，y）中每个像素的相对标准偏差，相对标准偏差的三倍是每个像素的边缘阈值; 通过使用每个像素的边缘阈值来从归一化图像B（x，y）中减去滤波图像C（x，y）获得的差分图像，以形成阈值处理图像D（x，y）; 通过使用非线性函数来增强阈值处理图像D（x，y）的对比度，以形成对比度增强图像E（x，y）; 确定增强系数a（x，y）; 通过将增强系数a（x，y），对比度增强图像E（x，y）和滤波图像C（x，y）相乘来获得边缘增强图像F（x，y） 并且通过将边缘增强图像F（x，y）和滤波图像C（x，y）的和与最大值Amax As相乘来生成结果图像，与现有技术相比，本发明的方法具有快速处理 图像信息增强的速度和简单的算法，图像清晰，消除了图像中的噪声，并且满足了相对更加增强扫描图像中的暗区域的对比度的要求。

公开(公告)号：US07570737B2

公开(公告)日：2009-08-04

申请号：US11801279

申请日：2007-05-08

申请人： Kejun Kang ,  Li Zhang ,  Zhiqiang Chen ,  Haifeng Hu ,  Yuanjing Li ,  Yinong Liu ,  Guowei Zhang ,  Ziran Zhao ,  Yuxiang Xing ,  Yongshun Xiao

发明人： Kejun Kang ,  Li Zhang ,  Zhiqiang Chen ,  Haifeng Hu ,  Yuanjing Li ,  Yinong Liu ,  Guowei Zhang ,  Ziran Zhao ,  Yuxiang Xing ,  Yongshun Xiao

IPC分类号： G01N23/04

CPC分类号： G01N23/046 ,  A61B6/027 ,  G01N2223/419 ,  G06T7/0008 ,  G06T7/97 ,  G06T2207/10081 ,  G06T2207/20016 ,  G06T2207/30112 ,  Y10S378/901

摘要： A cargo security inspection method and system based on spiral scanning, the method including: spirally scanning an inspected object at a first precision to obtain the transmission projection data; judging whether there is a suspect area in the inspected area; scanning at least one slice of the suspect area at a second precision wherein the second precision is greater than the first precision; reconstructing a tomographic image of the at least one slice; and using the reconstructed tomographic image to judge whether there is any dangerous article in the suspect area.

摘要翻译： 一种基于螺旋扫描的货物安全检查方法和系统，所述方法包括：以第一精度螺旋扫描检查对象以获得传输投影数据; 判断被检区域是否有可疑区域; 以第二精度扫描所述可疑区域的至少一个切片，其中所述第二精度大于所述第一精度; 重建所述至少一个切片的断层图像; 并使用重建的断层图像来判断可疑区域中是否存在任何危险物品。