公开(公告)号：US08724889B2

公开(公告)日：2014-05-13

申请号：US13140761

申请日：2011-05-11

申请人： Liang Li ,  Zhiqiang Chen ,  Li Zhang ,  Kejun Kang ,  Yuxiang Xing ,  Ziran Zhao ,  Yongshun Xiao ,  Zhifeng Huang

发明人： Liang Li ,  Zhiqiang Chen ,  Li Zhang ,  Kejun Kang ,  Yuxiang Xing ,  Ziran Zhao ,  Yongshun Xiao ,  Zhifeng Huang

IPC分类号： G06K9/00 ,  A61B6/00 ,  G01N23/00 ,  G21K1/12 ,  H05G1/60

CPC分类号： G06T11/006 ,  G06T2211/421

摘要： A method and apparatus for CT image reconstruction may include selecting, by a unit, projection data of the same height on a curve having a curvature approximate to that of the scanning circular orbit, implementing, by a unit, a weighting processing on the selected projection data, filtering, by a unit, the weighting processed projection data along a horizontal direction, implementing, by a unit, three-dimensional back projection on the filtered projection data along the direction of ray. The method and apparatus can effectively eliminate cone beam artifact under a large cone angle.

摘要翻译： 用于CT图像重建的方法和装置可以包括以单位选择具有接近于扫描圆形轨道的曲率的曲线上具有相同高度的投影数据，由单元实现对所选投影的加权处理 数据，单位滤波沿着水平方向的加权处理的投影数据，通过一个单元沿着沿着光线的方向实现对经滤波的投影数据的三维反投影。 该方法和装置可以有效地消除大锥角下的锥束伪影。

公开(公告)号：US20120106832A1

公开(公告)日：2012-05-03

申请号：US13140761

申请日：2011-05-11

申请人： Liang Li ,  Zhiqiang Chen ,  Li Zhang ,  Kejun Kang ,  Yuxiang Xing ,  Ziran Zhao ,  Yongshun Xiao ,  Zhifeng Huang

发明人： Liang Li ,  Zhiqiang Chen ,  Li Zhang ,  Kejun Kang ,  Yuxiang Xing ,  Ziran Zhao ,  Yongshun Xiao ,  Zhifeng Huang

IPC分类号： G06K9/00

CPC分类号： G06T11/006 ,  G06T2211/421

摘要： A method and apparatus for CT image reconstruction may include selecting, by a unit, projection data of the same height on a curve having a curvature approximate to that of the scanning circular orbit, implementing, by a unit, a weighting processing on the selected projection data, filtering, by a unit, the weighting processed projection data along a horizontal direction, implementing, by a unit, three-dimensional back projection on the filtered projection data along the direction of ray. The method and apparatus can effectively eliminate cone beam artifact under a large cone angle.

摘要翻译： 用于CT图像重建的方法和装置可以包括以单位选择具有接近于扫描圆形轨道的曲率的曲线上具有相同高度的投影数据，由单元实现对所选投影的加权处理 数据，单位滤波沿着水平方向的加权处理的投影数据，通过一个单元沿着沿着光线的方向实现对经滤波的投影数据的三维反投影。 该方法和装置可以有效地消除大锥角下的锥束伪影。

公开(公告)号：US20090003516A1

公开(公告)日：2009-01-01

申请号：US12159640

申请日：2006-12-14

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

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

IPC分类号： A61B6/00

CPC分类号： A61B6/032 ,  A61B6/587

摘要： An X-CT scan system includes a base, an object rotary support, an X-ray generation device and a data acquisition system, wherein one side of the detector is leveled to or beyond the prolong line of the connecting line between the X-ray source of the X-ray generation device and the center of the object rotary support, the length of the beyond portion is less than the radius of the imaging field. The advantage of the invention is in that the invention can reconstruct the entire image of the object by means of X-ray projection data which only covers half of the area of the object. Compared with the traditional CT scan system, half of the detector size can be saved at most. The X-CT scan system is simplified and the projection data amount for scan and computation amount for image reconstruction are also reduced with the reconstructed image quality guaranteed.

摘要翻译： X-CT扫描系统包括基座，对象旋转支架，X射线产生装置和数据采集系统，其中检测器的一侧被平整到或超过X射线之间的连接线的延长线 X射线产生装置的源和对象旋转支架的中心，超出部分的长度小于成像场的半径。 本发明的优点在于，本发明可以通过仅覆盖对象区域的一半的X射线投影数据来重建物体的整个图像。 与传统CT扫描系统相比，检测器尺寸的一半最多可以节省。 X-CT扫描系统被简化，并且用于图像重建的扫描和计算量的投影数据量也被减少，重建图像质量得到保证。

公开(公告)号：US07760852B2

公开(公告)日：2010-07-20

申请号：US12159640

申请日：2006-12-14

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

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

IPC分类号： A61B6/00

CPC分类号： A61B6/032 ,  A61B6/587

摘要： An X-CT scan system includes a base, an object rotary support, an X-ray generation device and a data acquisition system, wherein one side of the detector is leveled to or beyond the prolong line of the connecting line between the X-ray source of the X-ray generation device and the center of the object rotary support, the length of the beyond portion is less than the radius of the imaging field. The advantage of the invention is in that the invention can reconstruct the entire image of the object by means of X-ray projection data which only covers half of the area of the object. Compared with the traditional CT scan system, half of the detector size can be saved at most. The X-CT scan system is simplified and the projection data amount for scan and computation amount for image reconstruction are also reduced with the reconstructed image quality guaranteed.

摘要翻译： X-CT扫描系统包括基座，对象旋转支架，X射线产生装置和数据采集系统，其中检测器的一侧被平整到或超过X射线之间的连接线的延长线 X射线产生装置的源和对象旋转支架的中心，超出部分的长度小于成像场的半径。 本发明的优点在于，本发明可以通过仅覆盖对象区域的一半的X射线投影数据来重建物体的整个图像。 与传统CT扫描系统相比，检测器尺寸的一半最多可以节省。 X-CT扫描系统被简化，并且用于图像重建的扫描和计算量的投影数据量也被减少，重建图像质量得到保证。

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：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：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。

公开(公告)号：US20080084962A1

公开(公告)日：2008-04-10

申请号：US11801250

申请日：2007-05-08

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

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

IPC分类号： G01N23/04

CPC分类号： G01N23/046 ,  G01N2223/419 ,  G01T1/2985 ,  G01V5/005 ,  G06T7/0004

摘要： A multiple-view-angle cargo security inspection method for inspecting an object using a cargo security inspection system, the cargo security inspection system including a radiation source for generating a beam of rays for transmitting through the object to be inspected and a data collecting unit for collecting the transmission projection data after the beam of rays has transmitted through the inspected object, the method including a scanning step including: rotating the radiation source and/or the object about a rotation axis so as to achieve a relative rotation, thereby positioning the radiation source in a plurality of discrete positions with different view angles with respect to the inspected object, wherein, in each view angle, the radiation source moves along a straight line in a direction parallel to the rotation axis and at the same time scans the inspected object so as to acquire the transmission projection data at each view angle.

摘要翻译： 一种用于使用货物安全检查系统检查物体的多视角货物安全检查方法，所述货物安全检查系统包括用于产生用于通过待检查对象传送的光束的辐射源，以及用于 在射线束透过被检查物体之后收集透射投影数据，该方法包括扫描步骤，包括：使辐射源和/或物体围绕旋转轴旋转，以实现相对旋转，从而定位辐射 源于相对于被检查物体具有不同视角的多个离散位置，其中，在每个视角中，辐射源沿着平行于旋转轴线的方向沿着直线移动，并且同时扫描被检查物体 以便以每个视角获取传输投影数据。