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1. 发明授权

US09230348B2 Imaging system for imaging a region of interest 有权
标题翻译：用于成像感兴趣区域的成像系统
公开(公告)号：US09230348B2
公开(公告)日：2016-01-05
申请号：US13994775
申请日：2011-12-15
申请人： Roland Proksa , Bernhard Johannes Brendel , Thomas Koehler
发明人： Roland Proksa , Bernhard Johannes Brendel , Thomas Koehler
IPC分类号： G06T11/00
CPC分类号： G06T11/003 , G06T11/006 , G06T2211/408 , G06T2211/424
摘要： The noise of a detection value acquired by an imaging system (30) can depend on the contributions of different components within a region of interest to be imaged, which has been traversed by radiation (4) causing the respective acquired detection value. This dependence is considered while iteratively reconstructing an image of the region of interest, wherein first component attenuation values, which correspond to elements of a first component within the region of interest, and second component attenuation values, which correspond to elements of a first component within the region of interest, are determined, wherein noise values are determined from the first component attenuation values and the second component attenuation values and wherein the noise values are used for updating the image. This consideration of the dependence of the noise of an acquired detection value on the different components improves the quality of the iteratively reconstructed image.
摘要翻译：由成像系统（30）获取的检测值的噪声可以取决于被成像的感兴趣区域内的不同部件的贡献，其已被辐射（4）穿过，导致相应的获取的检测值。在迭代地重建感兴趣区域的图像的同时考虑这种依赖性，其中对应于感兴趣区域内的第一分量的元素的第一分量衰减值和与第一分量衰减值对应的第二分量衰减值确定感兴趣区域，其中根据第一分量衰减值和第二分量衰减值确定噪声值，并且其中噪声值用于更新图像。对所获取的检测值的噪声对不同分量的依赖性的考虑改善了迭代重建图像的质量。

2. 发明申请

US20130243297A1 FORWARD PROJECTION APPARATUS 有权
标题翻译：前进投影装置
公开(公告)号：US20130243297A1
公开(公告)日：2013-09-19
申请号：US13988349
申请日：2011-11-16
申请人： Thomas Koehler , Bernhard Johannes Brendel , Holger Schmitt , Rolf Dieter Bippus
发明人： Thomas Koehler , Bernhard Johannes Brendel , Holger Schmitt , Rolf Dieter Bippus
IPC分类号： G06T11/00
CPC分类号： G06T11/005 , G06T11/008 , G06T2211/424
摘要： The invention relates to a forward projection apparatus for performing a forward projection through an image (22), wherein at least one of a number of rays (20, 21) for performing the forward projection, a ray spacing between the rays and a kernel width of an interpolation kernel for calculating interpolated values located on the rays is varied depending on the ray width relative to an effective image element spacing between image elements (24) of the image. This allows reducing artifacts in simulated projection data and, thus, in an image, which is iteratively reconstructed by using the simulated projection data. For example, if the number of provided rays and/or the ray spacing between the provided rays is varied, aliasing artifacts can be reduced. Moreover, if the ray spacing between the provided rays and/or the kernel width of the interpolation kernel is varied, artifacts caused by varying effective kernel widths may be reduced.
摘要翻译：本发明涉及一种用于通过图像（22）进行向前投影的前投影装置，其中，用于执行向前投影的多个光线（20,21）中的至少一个，光线之间的光线间隔和核宽度用于计算位于光线上的内插值的插值内核根据相对于图像的图像元素（24）之间的有效图像元素间隔的光线宽度而变化。这允许减少模拟投影数据中的伪影，并因此减少通过使用模拟投影数据迭代重建的图像。例如，如果提供的光线的数量和/或所提供的光线之间的光线间隔变化，则可以减少混叠伪影。此外，如果所提供的光线之间的光线间距和/或内插核的内核宽度发生变化，则可能会降低由变化的有效内核宽度引起的伪影。

3. 发明申请

US20130251286A1 ITERATIVE RECONSTRUCTION ALGORITHM WITH A CONSTANT VARIANCE BASED WEIGHTING FACTOR 有权
标题翻译：基于恒定变量因子的迭代重构算法
公开(公告)号：US20130251286A1
公开(公告)日：2013-09-26
申请号：US13990450
申请日：2011-11-25
申请人： Bernhard Johannes Brendel , Thomas Koehler , Holger Schmitt , Rolf Dieter Bippus , Roland Proksa
发明人： Bernhard Johannes Brendel , Thomas Koehler , Holger Schmitt , Rolf Dieter Bippus , Roland Proksa
IPC分类号： G06T11/00
CPC分类号： G06T11/003 , G06T11/006 , G06T2211/424
摘要： A method includes reconstructing measured projection data using an iterative statistical reconstruction algorithm that reduces image artifact caused by differences in variances in projections of the measured projection data used to update a voxel of the image for one or more voxels of the image. A reconstructor includes a processor that reconstructs measured projection data using an iterative statistical reconstruction algorithm that reduces or mitigates image artifact caused by differences in variances in projections used to update a voxel of the image for one or more voxels of the image. A computer readable storage medium encoded with computer executable instructions, which, when executed by a processor of a computer, cause the processor to: reduce image artifact caused by differences in variances in projections used to update a voxel of an image for one or more voxels of the image using an iterative statistical reconstruction algorithm.
摘要翻译：一种方法包括使用迭代统计重建算法来重建测量的投影数据，所述迭代统计重构算法减少由用于更新图像的一个或多个体素的图像的体素的测量投影数据的投影方差的差异引起的图像伪像。重构器包括使用迭代统计重建算法来重建测量的投影数据的处理器，其减少或减轻由用于更新图像的一个或多个体素的图像的体素的投影方差的差异引起的图像伪像。一种用计算机可执行指令编码的计算机可读存储介质，其在由计算机的处理器执行时使处理器能够：减少由用于更新一个或多个体素的图像的体素的投影差异的差异引起的图像伪像的图像使用迭代统计重建算法。

4. 发明申请

US20130279785A1 IMAGING SYSTEM FOR IMAGING A REGION OF INTEREST 有权
标题翻译：用于成像区域的成像系统
公开(公告)号：US20130279785A1
公开(公告)日：2013-10-24
申请号：US13994775
申请日：2011-12-15
申请人： Roland Proksa , Bernhard Johannes Brendel , Thomas Koehler
发明人： Roland Proksa , Bernhard Johannes Brendel , Thomas Koehler
IPC分类号： G06T11/00
CPC分类号： G06T11/003 , G06T11/006 , G06T2211/408 , G06T2211/424
摘要： The noise of a detection value acquired by an imaging system (30) can depend on the contributions of different components within a region of interest to be imaged, which has been traversed by radiation (4) causing the respective acquired detection value. This dependence is considered while iteratively reconstructing an image of the region of interest, wherein first component attenuation values, which correspond to elements of a first component within the region of interest, and second component attenuation values, which correspond to elements of a first component within the region of interest, are determined, wherein noise values are determined from the first component attenuation values and the second component attenuation values and wherein the noise values are used for updating the image. This consideration of the dependence of the noise of an acquired detection value on the different components improves the quality of the iteratively reconstructed image.
摘要翻译：由成像系统（30）获取的检测值的噪声可以取决于被成像的感兴趣区域内的不同部件的贡献，其已被辐射（4）穿过，导致相应的获取的检测值。在迭代地重建感兴趣区域的图像的同时考虑这种依赖性，其中对应于感兴趣区域内的第一分量的元素的第一分量衰减值和与第一分量衰减值对应的第二分量衰减值确定感兴趣区域，其中根据第一分量衰减值和第二分量衰减值确定噪声值，并且其中噪声值用于更新图像。对所获取的检测值的噪声对不同分量的依赖性的考虑改善了迭代重建图像的质量。

5. 发明授权

US09299169B2 Iterative reconstruction algorithm with a constant variance based weighting factor 有权
标题翻译：具有恒定方差加权因子的迭代重建算法
公开(公告)号：US09299169B2
公开(公告)日：2016-03-29
申请号：US13990450
申请日：2011-11-25
申请人： Bernhard Johannes Brendel , Thomas Koehler , Holger Schmitt , Rolf Dieter Bippus , Roland Proksa
发明人： Bernhard Johannes Brendel , Thomas Koehler , Holger Schmitt , Rolf Dieter Bippus , Roland Proksa
IPC分类号： G06T11/00
CPC分类号： G06T11/003 , G06T11/006 , G06T2211/424
摘要： A method includes reconstructing measured projection data using an iterative statistical reconstruction algorithm that reduces image artifact caused by differences in variances in projections of the measured projection data used to update a voxel of the image for one or more voxels of the image. A reconstructor includes a processor that reconstructs measured projection data using an iterative statistical reconstruction algorithm that reduces or mitigates image artifact caused by differences in variances in projections used to update a voxel of the image for one or more voxels of the image. A computer readable storage medium encoded with computer executable instructions, which, when executed by a processor of a computer, cause the processor to: reduce image artifact caused by differences in variances in projections used to update a voxel of an image for one or more voxels of the image using an iterative statistical reconstruction algorithm.
摘要翻译：一种方法包括使用迭代统计重建算法来重建测量的投影数据，所述迭代统计重构算法减少由用于更新图像的一个或多个体素的图像的体素的测量投影数据的投影方差的差异引起的图像伪像。重构器包括使用迭代统计重建算法来重建测量的投影数据的处理器，其减少或减轻由用于更新图像的一个或多个体素的图像的体素的投影方差的差异引起的图像伪像。一种用计算机可执行指令编码的计算机可读存储介质，其在由计算机的处理器执行时使处理器能够：减少由用于更新一个或多个体素的图像的体素的投影差异的差异引起的图像伪像的图像使用迭代统计重建算法。

6. 发明授权

US09002090B2 Forward projection apparatus 有权
标题翻译：前投投影仪
公开(公告)号：US09002090B2
公开(公告)日：2015-04-07
申请号：US13988349
申请日：2011-11-16
申请人： Thomas Koehler , Bernhard Johannes Brendel , Holger Schmitt , Rolf Dieter Bippus
发明人： Thomas Koehler , Bernhard Johannes Brendel , Holger Schmitt , Rolf Dieter Bippus
IPC分类号： G06K9/00 , G06T11/00
CPC分类号： G06T11/005 , G06T11/008 , G06T2211/424
摘要： The invention relates to a forward projection apparatus for performing a forward projection through an image (22), wherein at least one of a number of rays (20, 21) for performing the forward projection, a ray spacing between the rays and a kernel width of an interpolation kernel for calculating interpolated values located on the rays is varied depending on the ray width relative to an effective image element spacing between image elements (24) of the image. This allows reducing artifacts in simulated projection data and, thus, in an image, which is iteratively reconstructed by using the simulated projection data. For example, if the number of provided rays and/or the ray spacing between the provided rays is varied, aliasing artifacts can be reduced. Moreover, if the ray spacing between the provided rays and/or the kernel width of the interpolation kernel is varied, artifacts caused by varying effective kernel widths may be reduced.
摘要翻译：本发明涉及一种用于通过图像（22）进行向前投影的前投影装置，其中，用于执行向前投影的多个光线（20,21）中的至少一个，光线之间的光线间隔和核宽度用于计算位于光线上的内插值的插值内核根据相对于图像的图像元素（24）之间的有效图像元素间隔的光线宽度而变化。这允许减少模拟投影数据中的伪影，并因此减少通过使用模拟投影数据迭代重建的图像。例如，如果提供的光线的数量和/或所提供的光线之间的光线间隔变化，则可以减少混叠伪影。此外，如果所提供的光线之间的光线间距和/或内插核的内核宽度发生变化，则可能会降低由变化的有效内核宽度引起的伪影。

7. 发明申请

US20100272331A1 METHOD FOR ASSESSING MEASUREMENT QUALITY AND DEVICE FOR IMAGING THE INTERIOR OF MEDIA 审中-公开
标题翻译：评估测量质量的方法和用于成像媒体内部的装置
公开(公告)号：US20100272331A1
公开(公告)日：2010-10-28
申请号：US12747177
申请日：2008-12-10
申请人： Bernhard Johannes Brendel , Tim Nielsen , Levinus Pieter Bakker , Henricus Wilhelm Peter Van Der Heijden
发明人： Bernhard Johannes Brendel , Tim Nielsen , Levinus Pieter Bakker , Henricus Wilhelm Peter Van Der Heijden
IPC分类号： G06T7/00
CPC分类号： A61B5/4312 , A61B5/0091
摘要： A method for assessing measurement quality in acquisition of an image of the interior of a medium (1) is provided. The method comprises the steps: subsequently irradiating the medium (1) with light from a plurality of different source positions (s) and, for each source position, detecting light emanating from the medium in a plurality of different detection positions (d) for acquisition of an image of the interior of the medium (1). The method further comprises the step: providing information about whether the measurement quality is deteriorated by exploiting signal symmetry under reversal of the light path.
摘要翻译：提供了一种评估介质内部图像的测量质量的方法（1）。该方法包括以下步骤：随后对来自多个不同源位置的光照射介质（1），并且对于每个源位置，在多个不同检测位置（d）中检测从介质发出的光以进行采集介质（1）的内部的图像。该方法还包括以下步骤：通过在光路反转下利用信号对称来提供关于测量质量是否劣化的信息。

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