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公开(公告)号:US08958660B2
公开(公告)日:2015-02-17
申请号:US13531255
申请日:2012-06-22
申请人: Debashish Pal , Donghwan Kim , Jang Hwan Cho , Jeffrey A. Fessler , Jean-Baptiste Thibault , Zhou Yu , Somesh Srivastava , Lin Fu , Bruno Kristiaan Bernard De Man
发明人: Debashish Pal , Donghwan Kim , Jang Hwan Cho , Jeffrey A. Fessler , Jean-Baptiste Thibault , Zhou Yu , Somesh Srivastava , Lin Fu , Bruno Kristiaan Bernard De Man
CPC分类号: G06T11/003 , G06T11/006 , G06T2211/408 , G06T2211/424
摘要: A method is provided for iteratively reconstructing an image of an object. The method includes accessing measurement data associated with the image, and using a simultaneous algorithm to reconstruct the image. Using the simultaneous algorithm to reconstruct the image includes determining a scaling factor that is voxel-dependent, and applying the voxel-dependent scaling factor to a gradient of an objective function to reconstruct the image.
摘要翻译: 提供了用于迭代地重建对象的图像的方法。 该方法包括访问与图像相关联的测量数据,并且使用同时的算法重建图像。 使用同时算法来重建图像包括确定与体素相关的缩放因子,以及将体素依赖缩放因子应用于目标函数的梯度以重建图像。
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公开(公告)号:US20130343673A1
公开(公告)日:2013-12-26
申请号:US13531255
申请日:2012-06-22
申请人: Debashish Pal , Donghwan Kim , Jang Hwan Cho , Jeffrey A. Fessler , Jean-Baptiste Thibault , Zhou Yu , Somesh Srivastava , Lin Fu , Bruno Kristiaan Bernard De Man
发明人: Debashish Pal , Donghwan Kim , Jang Hwan Cho , Jeffrey A. Fessler , Jean-Baptiste Thibault , Zhou Yu , Somesh Srivastava , Lin Fu , Bruno Kristiaan Bernard De Man
IPC分类号: G06T11/00
CPC分类号: G06T11/003 , G06T11/006 , G06T2211/408 , G06T2211/424
摘要: A method is provided for iteratively reconstructing an image of an object. The method includes accessing measurement data associated with the image, and using a simultaneous algorithm to reconstruct the image. Using the simultaneous algorithm to reconstruct the image includes determining a scaling factor that is voxel-dependent, and applying the voxel-dependent scaling factor to a gradient of an objective function to reconstruct the image.
摘要翻译: 提供了用于迭代地重建对象的图像的方法。 该方法包括访问与图像相关联的测量数据,并且使用同时的算法重建图像。 使用同时算法来重建图像包括确定与体素相关的缩放因子,以及将体素依赖缩放因子应用于目标函数的梯度以重建图像。
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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
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。
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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。
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