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41.发明申请UNIFYING RECONSTRUCTION AND MOTION ESTIMATION IN FIRST PASS CARDIAC PERFUSION IMAGING 有权第一次心脏灌注成像中的统一重建和运动估计公开(公告)号：US20120148128A1
公开(公告)日：2012-06-14
申请号：US13273410
申请日：2011-10-14
IPC分类号： G06K9/00
CPC分类号： G01R33/56366 , G01R33/5611 , G01R33/56509
摘要： Methods and a system to unify reconstruction and motion estimation steps in first pass cardiac perfusion MRI include a global objective function that meets data consistency, spatial smoothness, motion and contrast dynamics constraints. The global objective decomposed into simpler sub-problems which include low pass filtering of a deformed object, TV shrinkage, analytical Fourier replacement and an l2 minimizing problem. A registration tool based on the local cross-correlation similarity measure and enabled to perform both rigid and flexile deformations, is applied. Registration parameters are tuned by rigid, semi rigid and flexible models at different stages of iterations. A system to perform the methods is also disclosed.
摘要翻译： 在第一次心脏灌注MRI中统一重建和运动估计步骤的方法和系统包括满足数据一致性，空间平滑度，运动和对比度动力学约束的全局目标函数。 全局目标分解为更简单的子问题，包括变形对象的低通滤波，电视收缩，分析傅立叶置换和最小二乘问题。 应用基于局部互相关相似性测量并且能够执行刚性和柔性变形的注册工具。 注册参数通过刚性，半刚性和柔性模型在不同的迭代阶段进行调整。 还公开了执行方法的系统。
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42.发明授权Method and system for registration of contrast-enhanced images with volume-preserving constraint 有权使用体积保留约束的对比度增强图像配准的方法和系统公开(公告)号：US08098911B2
公开(公告)日：2012-01-17
申请号：US11945337
申请日：2007-11-27
IPC分类号： G06K9/32
CPC分类号： G06K9/32 , G06K9/6206 , G06T7/30
摘要： A method and system for registering a first image of, for example, a liver and a second image of the liver being contrast-enhanced comprises: deriving a statistical similarity measure between images; deriving a smooth divergence-free vector field derived from a gradient of the statistical similarity measure; and integrating the vector field for providing a fluid-based algorithm including a volume-preserving constraint for a transformation for registering the images.
摘要翻译： 用于登记例如肝脏的第一图像和对比度增强的肝脏的第二图像的方法和系统包括：导出图像之间的统计学相似性度量; 导出从统计相似性度量的梯度导出的平滑无差矢量场; 并且整合矢量场以提供基于流体的算法，其包括用于注册图像的变换的体积保留约束。
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43.发明申请SYSTEM AND METHOD FOR VERIFYING REGISTRATION ACCURACY IN DIGITAL MEDICAL IMAGES 有权用于在数字医学图像中验证注册精度的系统和方法公开(公告)号：US20110085716A1
公开(公告)日：2011-04-14
申请号：US12897845
申请日：2010-10-05
IPC分类号： G06K9/00
CPC分类号： G06K9/6215 , G06T7/33 , G06T2207/10072 , G06T2207/30016
摘要： A method of verifying a registration of a digital image includes receiving a reference image and a moving image registered to the reference image representing the same object, selecting one or more landmarks in the images, defining a neighborhood in the domain of each image near each selected landmark, extracting feature sets from the neighborhoods for the reference image and the registered moving image, calculating a total quality measure of the registration of the moving image from a distance metric applied to the feature sets extracted from the neighborhoods of the reference image and the registered moving image, comparing the total quality measure to a threshold determined from a reference atlas for the object represented in the image, and determining whether to accept or reject the registration of the moving image based on the comparison result.
摘要翻译： 验证数字图像的注册的方法包括接收参考图像和登记到表示相同对象的参考图像的运动图像，选择图像中的一个或多个界标，定义每个图像附近的每个图像的域中的邻域 从参考图像和注册的运动图像的邻域中提取特征集合，从施加到从参考图像的邻域提取的特征集的距离度量和注册的参考图像的附近计算运动图像的注册的总质量测量 运动图像，将总质量度量与由图像中表示的对象的参考图集确定的阈值进行比较，以及基于比较结果确定是否接受或拒绝运动图像的注册。
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公开(公告)号：US20080039706A1
公开(公告)日：2008-02-14
申请号：US11805218
申请日：2007-05-22
IPC分类号： A61B5/05
CPC分类号： A61B90/36 , A61B2090/364 , G06T7/35 , G06T2207/30016
摘要： A method of aligning image having the steps of obtaining a first image, the first image having a corresponding first data set, obtaining a second image, the second having a corresponding second data set; learning a joint intensity distribution from a pair of prealigned images, and aligning the first image and the second image by computing Earth Mover's Distance between their observed joint intensity distribution and the learned joint intensity distribution.
摘要翻译： 一种对准具有获得第一图像的步骤的图像的方法，所述第一图像具有对应的第一数据集，获得第二图像，所述第二图像具有对应的第二数据集; 从一对预对准图像学习联合强度分布，并通过计算地球移动器的观察到的关节强度分布与学习的关节强度分布之间的距离来对准第一图像和第二图像。
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45.发明申请公开(公告)号：US20070086678A1
公开(公告)日：2007-04-19
申请号：US11580670
申请日：2006-10-13
申请人： Christophe Chefd'hotel , Wanmei Ou
发明人： Christophe Chefd'hotel , Wanmei Ou
CPC分类号： G06K9/6289 , G06T5/50 , G06T7/30 , G06T2207/30016
摘要： A method for multimodal image registration includes providing a pair of images acquired from differing imaging modalities, defining an intensity correction function that corrects the intensities of a first image in terms of the intensities of the second image, defining a registration transformation function that registers the second image with the first image, wherein said intensity correction function and transformation function are functions of a plurality of parameters, obtaining corrections to the plurality of parameters by minimizing an energy functional of a square difference of the intensity corrected first image and the registration transformed second image, and updating the intensity correction function and the registration transformation function based on the corrected plurality of parameters.
摘要翻译： 一种用于多模式图像配准的方法包括提供从不同成像模态获得的一对图像，其定义强度校正功能，该强度校正功能根据第二图像的强度来校正第一图像的强度，定义登记变换功能， 具有第一图像的图像，其中所述强度校正函数和变换函数是多个参数的函数，通过最小化强度校正的第一图像和注册变换的第二图像的平方差的能量函数来获得对多个参数的校正 并且基于校正的多个参数来更新强度校正功能和登记变换功能。
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公开(公告)号：US20060045366A1
公开(公告)日：2006-03-02
申请号：US11205569
申请日：2005-08-17
IPC分类号： G06K9/36
摘要： A method for motion compensation between first and second images in a temporal sequence includes processing the first and second images in a reduction process for providing respective reduced resolution first and second images; deriving respective first and second feature maps from the respective reduced resolution first and second images, the feature maps including deriving the respective Laplacian of image data in the respective reduced resolution first and second images; deriving a displacement field by processing the first and second feature maps in accordance with a registration algorithm, the registration algorithm comprising solving, for each picture element or voxel, a local Gaussian weighted least mean square problem so as to derive respective vectors forming the displacement field; and warping the second image with the displacement field.
摘要翻译： 一种用于在时间序列中的第一和第二图像之间的运动补偿的方法包括在缩小处理中处理第一和第二图像以提供相应的缩小分辨率的第一和第二图像; 从相应的减小分辨率的第一和第二图像中导出相应的第一和第二特征图，所述特征图包括导出相应的缩小分辨率的第一和第二图像中的各个拉普拉斯算子的图像数据; 通过根据注册算法处理第一和第二特征图来导出位移场，该注册算法包括针对每个像素或体元求解局部高斯加权最小均方问题，以便导出形成位移场的各向量 ; 并用位移场来扭曲第二个图像。
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公开(公告)号：US20050190189A1
公开(公告)日：2005-09-01
申请号：US11062962
申请日：2005-02-22
CPC分类号： G06T15/04 , G06T7/30 , G06T15/005
摘要： A method of registering two images using a graphics processing unit includes providing a pair of images with a first and second image, calculating a gradient of the second image, initializing a displacement field on the grid point domain of the pair of images, generating textures for the first image, the second image, the gradient, and the displacement field, and loading said textures into the graphics processing unit. A pixel buffer is created and initialized with the texture containing the displacement field. The displacement field is updated from the first image, the second image, and the gradient for one or more iterations in one or more rendering passes performed by the graphics processing unit.
摘要翻译： 使用图形处理单元登记两个图像的方法包括：提供一对具有第一和第二图像的图像，计算第二图像的梯度，初始化该对图像的网格点域上的位移场，生成纹理 第一图像，第二图像，渐变和位移场，并将所述纹理加载到图形处理单元中。 使用包含位移字段的纹理创建和初始化像素缓冲区。 从图形处理单元执行的一个或多个渲染通过中的一个或多个迭代的第一图像，第二图像和梯度更新位移场。
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48.发明授权Multilevel thresholding for mutual information based registration and image registration using a GPU 有权用于基于互信息的注册和使用GPU的图像注册的多级阈值公开(公告)号：US08731334B2
公开(公告)日：2014-05-20
申请号：US12509740
申请日：2009-07-27
CPC分类号： G06K9/6212 , G06K9/00986 , G06T3/0068 , G06T7/35 , G06T2200/28 , G06T2207/30004
摘要： An exemplary embodiment of the present invention includes a method of registering images. The method includes: for each image, determining an optimum intensity threshold set from a plurality of intensity threshold sets that maximizes a variance between classes of each set, segmenting each image using the corresponding determined optimum intensity threshold set, generating mutual information from a joint histogram of at least two of the segmented images, and registering the at least two images using the mutual information. The joint histogram may be generated using a geometry shader of a graphical processing unit.
摘要翻译： 本发明的示例性实施例包括一种登记图像的方法。 该方法包括：对于每个图像，确定从多个强度阈值集合确定的最佳强度阈值集合，其使每组的类别之间的方差最大化，使用相应的确定的最佳强度阈值集分割每个图像，从联合直方图生成相互信息 的至少两个分割图像，以及使用所述相互信息登记所述至少两个图像。 联合直方图可以使用图形处理单元的几何着色器生成。
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49.发明申请公开(公告)号：US20130266198A1
公开(公告)日：2013-10-10
申请号：US13717988
申请日：2012-12-18
IPC分类号： G06T7/00
CPC分类号： G06T7/0012 , G06T5/008 , G06T5/50 , G06T2207/10088 , G06T2207/10104 , G06T2207/30016
摘要： A method (100) that generates attenuation correction maps for the reconstruction of PET data using MR images, such as, MR ultra-fast TE (UTE) images, Dixon MR images, as well as MR images obtained using other MR imaging methods.
摘要翻译： 一种方法（100），其使用诸如MR超快TE（UTE）图像，Dixon MR图像的MR图像以及使用其他MR成像方法获得的MR图像来生成用于重建PET数据的衰减校正图。
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50.发明授权Method for segmenting an image using constrained graph partitioning of watershed adjacency graphs 有权使用分水岭邻接图的约束图分割来分割图像的方法公开(公告)号：US08411952B2
公开(公告)日：2013-04-02
申请号：US11923868
申请日：2007-10-25
IPC分类号： G06K9/34
CPC分类号： G06T7/162 , G06T7/11 , G06T7/155 , G06T2207/10081 , G06T2207/30061
摘要： A method for segmenting at least a pair of regions of an image, such method comprising: obtaining data of the image; computing watersheds of the image from intensity gradients of such image data; extracting a watershed region adjacency graph from the computed watersheds, such graph comprising a plurality of nodes corresponding to the watersheds and node interconnecting edges; assigning weights to the interconnecting edges; identifying each of the pair of regions in the image; identifying the nodes corresponding to the pair of identified regions in the adjacency graph; applying constrained graph-partitioning in the adjacency graph using the edge-weights to label unmarked nodes corresponding to each one of the pair of regions; and extrapolating the obtained label nodes on the graph to the image to segment each one of the pair of regions of the image.
摘要翻译： 一种用于分割图像的至少一对区域的方法，所述方法包括：获得图像的数据; 从图像数据的强度梯度计算图像的流域; 从所计算的流域中提取分水岭区域邻接图，所述图包括对应于流域和节点互连边缘的多个节点; 为互连边缘分配权重; 识别图像中的该对区域中的每一个; 识别与邻接图中的所述一对识别的区域相对应的节点; 使用边缘权重在邻接图中应用约束图划分来标记对应于该对区域中的每一个的未标记节点; 并且将获得的图上的标签节点外推到图像上以分割图像的该对区域中的每一个。
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