利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

11 条记录 (耗时 0.023 秒)

    Iterative reconstruction methods for multi-slice computed tomography
    1.
    发明授权
    Iterative reconstruction methods for multi-slice computed tomography 有权
    多层计算机断层扫描的迭代重建方法

    公开(公告)号：US06907102B1

    公开(公告)日：2005-06-14

    申请号：US10319674

    申请日：2002-12-16

    申请人： Ken Sauer ,  Charles A. Bouman ,  Jean-Baptiste Thibault ,  Jiang Hsieh

    发明人： Ken Sauer ,  Charles A. Bouman ,  Jean-Baptiste Thibault ,  Jiang Hsieh

    IPC分类号： A61B6/03 ,  G06T11/00 ,  A61B6/00

    CPC分类号： G06T11/006 ,  A61B6/027 ,  A61B6/032 ,  A61B6/4085 ,  G06T2211/424 ,  Y10S378/901

    摘要： A multi-slice computed tomography imaging system is provided including a source that generates an x-ray beam and a detector array that receives the x-ray beam and generates projection data. A translatable table has an object thereon and is operable to translate in relation to the source and the detector array. The source and the detector array rotate about the translatable table to helically scan the object. An image reconstructor is electrically coupled to the detector array and reconstructs an image in response to the projection data using a computed tomography modeled iterative reconstruction technique. The iterative reconstruction technique includes determining a cross-section reconstruction vector, which approximately matches the projection data via a computed tomography model. Methods for performing the same are also provided including accounting for extended boundary regions.

    摘要翻译： 提供了一种多切片计算机断层摄影成像系统，其包括产生X射线束的源和接收X射线束并产生投影数据的检测器阵列。 一个可翻译的桌子上有一个物体，它可以相对于源和检测器阵列进行平移。 源和检测器阵列绕可翻译表旋转以螺旋扫描对象。 图像重构器电耦合到检测器阵列，并且使用计算机断层摄影建模的迭代重建技术来响应于投影数据重建图像。 迭代重建技术包括确定通过计算机断层摄影模型近似匹配投影数据的横截面重建矢量。 还提供了用于执行该方法的方法，包括扩展边界区域的计算。

    Iterative method for region-of-interest reconstruction
    2.
    发明授权
    Iterative method for region-of-interest reconstruction 有权
    用于重建区域的迭代法

    公开(公告)号：US06768782B1

    公开(公告)日：2004-07-27

    申请号：US10319689

    申请日：2002-12-16

    申请人： Jiang Hsieh ,  Jean-Baptiste Thibault ,  Charles A. Bouman ,  Ken Sauer

    发明人： Jiang Hsieh ,  Jean-Baptiste Thibault ,  Charles A. Bouman ,  Ken Sauer

    IPC分类号： A61B603

    CPC分类号： A61B6/032 ,  A61B6/4085 ,  A61B6/469 ,  Y10S378/901

    摘要： An imaging system is provided including a source generating an x-ray beam and a detector array receiving the x-ray beam and generating projection data corresponding to at least a scanned portion of an object. An image reconstructor is electrically coupled to said detector array and reconstructs an image of the scanned portion of the object for a full field-of-view in response to said projection data using a dual iterative reconstruction technique. The dual iterative reconstruction technique includes reconstructing the full field-of-view using a first resolution and reconstructing a region-of-interest within the full FOV using a second resolution. A method is also provided for reconstructing an image using projection data from such an imaging system.

    摘要翻译： 提供了一种成像系统，包括产生x射线束的源和接收x射线束的检测器阵列，并且产生与至少对象的扫描部分对应的投影数据。 图像重构器电耦合到所述检测器阵列，并且使用双重迭代重建技术来响应于所述投影数据重建对象的扫描部分的图像以获得完整的视野。 双重迭代重建技术包括使用第一分辨率重构全视野并且使用第二分辨率来重构全FOV内的感兴趣区域。 还提供了一种用于使用来自这种成像系统的投影数据来重建图像的方法。

    Method and apparatus for iterative reconstruction
    3.
    发明授权
    Method and apparatus for iterative reconstruction 有权
    迭代重建的方法和装置

    公开(公告)号：US08885975B2

    公开(公告)日：2014-11-11

    申请号：US13531082

    申请日：2012-06-22

    申请人： Zhou Yu ,  Bruno Kristiaan Bernard De Man ,  Jean-Baptiste Thibault ,  Debashish Pal ,  Lin Fu ,  Charles A. Bouman ,  Ken Sauer ,  Sathish Ramani ,  Jeffrey A. Fessler ,  Somesh Srivastava

    发明人： Zhou Yu ,  Bruno Kristiaan Bernard De Man ,  Jean-Baptiste Thibault ,  Debashish Pal ,  Lin Fu ,  Charles A. Bouman ,  Ken Sauer ,  Sathish Ramani ,  Jeffrey A. Fessler ,  Somesh Srivastava

    IPC分类号： G06K9/36 ,  G06K9/00 ,  G06T11/00

    CPC分类号： G06T11/003 ,  G06T11/006 ,  G06T2211/424

    摘要： A method is provided for reconstructing an image of an object that includes image elements. The method includes accessing measurement data associated with the image elements, introducing an auxiliary variable to transform an original problem of reconstructing the image to a constrained optimization problem, and solving the constrained optimization problem using a method of multipliers to create a sequence of sub-problems and solve the sequence of sub-problems. Solving the sequence of sub-problems includes reconstructing the image by optimizing a first objective function. The first objective function is optimized by iteratively solving a nested sequence of approximate optimization problems. An inner loop iteratively optimizes a second objective function approximating the first objective function. An outer loop utilizes the solution of the second objective function to optimize the first objective function.

    摘要翻译： 提供了一种用于重构包括图像元素的对象的图像的方法。 该方法包括访问与图像元素相关联的测量数据，引入辅助变量以将原始图像重建问题转换为约束优化问题，以及使用乘法器的方法来解决约束优化问题以创建子问题序列 并解决子问题的顺序。 解决子问题的顺序包括通过优化第一目标函数重建图像。 通过迭代求解近似优化问题的嵌套序列，优化了第一个目标函数。 内循环迭代地优化接近于第一目标函数的第二目标函数。 外环利用第二目标函数的解来优化第一目标函数。

    METHOD AND APPARATUS FOR ITERATIVE RECONSTRUCTION
    4.
    发明申请
    METHOD AND APPARATUS FOR ITERATIVE RECONSTRUCTION 有权
    用于迭代重建的方法和装置

    公开(公告)号：US20130343672A1

    公开(公告)日：2013-12-26

    申请号：US13531082

    申请日：2012-06-22

    申请人： ZHOU YU ,  Bruno Kristiaan Bernard De Man ,  Jean-Baptiste Thibault ,  Debashish Pal ,  Lin Fu ,  Charles A. Bouman ,  Ken Sauer ,  Sathish Ramani ,  Jeffrey A. Fessler ,  Somesh Srivastava

    发明人： ZHOU YU ,  Bruno Kristiaan Bernard De Man ,  Jean-Baptiste Thibault ,  Debashish Pal ,  Lin Fu ,  Charles A. Bouman ,  Ken Sauer ,  Sathish Ramani ,  Jeffrey A. Fessler ,  Somesh Srivastava

    IPC分类号： G06T11/00

    CPC分类号： G06T11/003 ,  G06T11/006 ,  G06T2211/424

    摘要： A method is provided for reconstructing an image of an object that includes image elements. The method includes accessing measurement data associated with the image elements, introducing an auxiliary variable to transform an original problem of reconstructing the image to a constrained optimization problem, and solving the constrained optimization problem using a method of multipliers to create a sequence of sub-problems and solve the sequence of sub-problems. Solving the sequence of sub-problems includes reconstructing the image by optimizing a first objective function. The first objective function is optimized by iteratively solving a nested sequence of approximate optimization problems. An inner loop iteratively optimizes a second objective function approximating the first objective function. An outer loop utilizes the solution of the second objective function to optimize the first objective function.

    摘要翻译： 提供了一种用于重构包括图像元素的对象的图像的方法。 该方法包括访问与图像元素相关联的测量数据，引入辅助变量以将原始图像重建问题转换为约束优化问题，以及使用乘法器的方法来解决约束优化问题以创建子问题序列 并解决子问题的顺序。 解决子问题的顺序包括通过优化第一目标函数重建图像。 通过迭代求解近似优化问题的嵌套序列，优化了第一个目标函数。 内循环迭代地优化接近于第一目标函数的第二目标函数。 外环利用第二目标函数的解来优化第一目标函数。