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：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：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：US07924975B2

公开(公告)日：2011-04-12

申请号：US12419603

申请日：2009-04-07

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

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

IPC分类号： G01N23/04

CPC分类号： G01V5/005 ,  G01B15/00 ,  G01V5/0016 ,  G03B42/00

摘要： In a linear track scanning imaging system and method, the imaging system may include: a ray generating unit having a plurality of ray sources that emit beams alternately, only one ray source at a time; an actuating arrangement causing an object under examination to move with respect to the linear track scanning imaging system along a linear track, leading the object to pass through a scanning area of the linear track scanning imaging system; a data collecting unit that collects projection data of the object for each ray source; an imaging unit that reconstructs an image of the object under examination based on the projection data collected for each ray source; and a display unit for displaying the reconstructed image.

摘要翻译： 在线性轨迹扫描成像系统和方法中，成像系统可以包括：具有交替地发射束的多个射线源的射线产生单元，一次只有一个射线源; 致动装置使被检查物体沿着线性轨迹相对于线性轨道扫描成像系统移动，使物体通过线性轨道扫描成像系统的扫描区域; 数据收集单元，收集每个射线源的物体的投影数据; 成像单元，其基于针对每个射线源收集的投影数据重建被检查物体的图像; 以及显示单元，用于显示重建图像。

公开(公告)号：US07499522B2

公开(公告)日：2009-03-03

申请号：US11801272

申请日：2007-05-08

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

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

IPC分类号： G01N23/04

CPC分类号： G01N23/04 ,  G06T7/0004

摘要： A cargo security inspection system inspecting an object moving through the system, including: a mechanical conveyance unit carrying, conveying, and defining a travel path of the object in the system; a radiation-generating unit generating ray beams for transmitting through the object; and a data collecting unit collecting transmission data about the rays having already transmitted through the object and processing the transmission data; wherein the travel path includes at least two linear sub-paths at an angle relative to each other; the data collecting unit includes at least two detector arrays receiving ray beams, each detector array corresponding to one linear sub-path, a receiving plane of each of the detector arrays disposed parallel to its corresponding linear sub-path; and in use, the radiation-generating and data collecting units remain stationary, and the object travels along its travel path and only translates on the at least two linear sub-paths without any rotation.

摘要翻译： 检查通过系统移动的物体的货物安全检查系统，包括：机械传送单元，承载，传送和限定系统中物体的行进路径; 辐射产生单元，其产生用于透过物体的射线束; 以及数据收集单元，收集关于已经通过对象发送的射线的发送数据，并处理发送数据; 其中所述行进路径包括相对于彼此成一定角度的至少两个线性子路径; 所述数据收集单元包括至少两个接收射线束的检测器阵列，每个检测器阵列对应于一个线性子路径，每个检测器阵列的接收平面平行于其对应的线性子路径设置; 并且在使用中，辐射产生和数据收集单元保持静止，并且物体沿其行进路径行进，并且仅在至少两个线性子路径上平移而没有任何旋转。

公开(公告)号：US20080075226A1

公开(公告)日：2008-03-27

申请号：US11801272

申请日：2007-05-08

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

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

IPC分类号： G01N23/00

CPC分类号： G01N23/04 ,  G06T7/0004

摘要： A cargo security inspection system inspecting an object moving through the system, including: a mechanical conveyance unit carrying, conveying, and defining a travel path of the object in the system; a radiation-generating unit generating ray beams for transmitting through the object; and a data collecting unit collecting transmission data about the rays having already transmitted through the object and processing the transmission data; wherein the travel path includes at least two linear sub-paths at an angle relative to each other; the data collecting unit includes at least two detector arrays receiving ray beams, each detector array corresponding to one linear sub-path, a receiving plane of each of the detector arrays disposed parallel to its corresponding linear sub-path; and in use, the radiation-generating and data collecting units remain stationary, and the object travels along its travel path and only translates on the at least two linear sub-paths without any rotation.

摘要翻译： 检查通过系统移动的物体的货物安全检查系统，包括：机械传送单元，承载，传送和限定系统中物体的行进路径; 辐射产生单元，其产生用于透过物体的射线束; 以及数据收集单元，收集关于已经通过对象发送的射线的发送数据，并处理发送数据; 其中所述行进路径包括相对于彼此成一定角度的至少两个线性子路径; 数据采集​​单元包括至少两个接收射线束的检测器阵列，每个检测器阵列对应于一个线性子路径，每个检测器阵列的接收平面平行于其对应的线性子路径设置; 并且在使用中，辐射产生和数据收集单元保持静止，并且物体沿其行进路径行进，并且仅在至少两个线性子路径上平移而没有任何旋转。