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

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

    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
    6.
    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

    IPC分类号: G06T11/00

    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。

    System and method for iterative image reconstruction
    7.
    发明授权
    System and method for iterative image reconstruction 有权
    迭代图像重建的系统和方法

    公开(公告)号:US08897528B2

    公开(公告)日:2014-11-25

    申请号:US13174461

    申请日:2011-06-30

    摘要: Methods are provided for iteratively reconstructing an image signal to generate a reconstructed image signal. In one embodiment, sub-iterations of each iteration are performed on pixel or voxel subsets. The subsets may be composed of neighboring or spatially separated pixel or voxels and may extend in the z-direction. In one embodiment, an update step of the iterative reconstruction involves the direct inversion of an approximation of a Hessian matrix associated with the respective subsets. In further embodiments, non-negativity or other limitations or constraints on update values may be enforced.

    摘要翻译: 提供了用于迭代重建图像信号以产生重建图像信号的方法。 在一个实施例中,对像素或体素子集执行每次迭代的子迭代。 子集可以由相邻或空间上分离的像素或体元组成,并且可以在z方向上延伸。 在一个实施例中,迭代重建的更新步骤包括与相应子集相关联的Hessian矩阵的近似的直接反转。 在另外的实施例中,可以执行非消极性或对更新值的其他限制或限制。

    Tomographic iterative reconstruction
    10.
    发明授权
    Tomographic iterative reconstruction 有权
    层析迭代重建

    公开(公告)号:US08971599B2

    公开(公告)日:2015-03-03

    申请号:US12973649

    申请日:2010-12-20

    IPC分类号: G06K9/00 G06T11/00

    CPC分类号: G06T11/006 G06T2211/424

    摘要: The present disclosure relates to iterative reconstruction of images. In certain embodiments, a deconvolution filter is used to approximate the inversion of a Hessian matrix associated with the reconstruction. In one such embodiment, the desired image is not reconstructed directly in the iterative process. Instead, an image is reconstructed that yields the desired image when filtered by the deconvolution filter.

    摘要翻译: 本公开涉及图像的迭代重建。 在某些实施例中,使用去卷积滤波器近似与重建相关联的赫西矩阵的反演。 在一个这样的实施例中,期望的图像不是在迭代过程中直接重构。 相反,重构图像,其通过去卷积滤波器滤波时产生期望的图像。