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    • 3. 发明授权
    • System and method for lesion detection using locally adjustable priors
    • 使用局部可调节先验的病变检测系统和方法
    • US07876943B2
    • 2011-01-25
    • US12241183
    • 2008-09-30
    • Anna JerebkoMarcos SalganicoffManeesh DewanHarald Steck
    • Anna JerebkoMarcos SalganicoffManeesh DewanHarald Steck
    • G06K9/00A61B5/00
    • G06K9/6278G06K2209/05G06K2209/053G06T7/0012G06T7/11G06T7/143G06T2207/30028G06T2207/30061
    • According to an aspect of the invention, a method for training a classifier for classifying candidate regions in computer aided diagnosis of digital medical images includes providing a training set of annotated images, each image including one or more candidate regions that have been identified as suspicious, deriving a set of descriptive feature vectors, where each candidate region is associated with a feature vector. A subset of the features are conditionally dependent, and the remaining features are conditionally independent. The conditionally independent features are used to train a naïve Bayes classifier that classifies the candidate regions as lesion or non-lesion. A joint probability distribution that models the conditionally dependent features, and a prior-odds probability ratio of a candidate region being associated with a lesion are determined from the training images. A new classifier is formed from the naïve Bayes classifier, the joint probability distribution, and the prior-odds probability ratio.
    • 根据本发明的一个方面,一种训练分类器的方法,用于对数字医学图像的计算机辅助诊断中的候选区域进行分类,包括提供注释图像的训练集,每个图像包括已被识别为可疑的一个或多个候选区域, 导出一组描述性特征向量,其中每个候选区域与特征向量相关联。 特征的子集有条件依赖,其余的特征是有条件的独立的。 条件独立的特征用于训练将候选区域分类为病变或非损伤的朴素贝叶斯分类器。 从训练图像确定与条件相关特征建模的联合概率分布以及与病变相关联的候选区域的先验概率概率。 从初始贝叶斯分类器,联合概率分布和先验概率概率比构成新的分类器。
    • 4. 发明申请
    • System and Method for Lesion Detection Using Locally Adjustable Priors
    • 使用局部可调节的病变检测系统和方法
    • US20090092300A1
    • 2009-04-09
    • US12241183
    • 2008-09-30
    • Anna JerebkoMarcos SalganicoffManeesh DewanHarald Steck
    • Anna JerebkoMarcos SalganicoffManeesh DewanHarald Steck
    • G06K9/00
    • G06K9/6278G06K2209/05G06K2209/053G06T7/0012G06T7/11G06T7/143G06T2207/30028G06T2207/30061
    • According to an aspect of the invention, a method for training a classifier for classifying candidate regions in computer aided diagnosis of digital medical images includes providing a training set of annotated images, each image including one or more candidate regions that have been identified as suspicious, deriving a set of descriptive feature vectors, where each candidate region is associated with a feature vector. A subset of the features are conditionally dependent, and the remaining features are conditionally independent. The conditionally independent features are used to train a naïve Bayes classifier that classifies the candidate regions as lesion or non-lesion. A joint probability distribution that models the conditionally dependent features, and a prior-odds probability ratio of a candidate region being associated with a lesion are determined from the training images. A new classifier is formed from the naïve Bayes classifier, the joint probability distribution, and the prior-odds probability ratio.
    • 根据本发明的一个方面,一种训练分类器的方法,用于对数字医学图像的计算机辅助诊断中的候选区域进行分类,包括提供注释图像的训练集,每个图像包括已被识别为可疑的一个或多个候选区域, 导出一组描述性特征向量,其中每个候选区域与特征向量相关联。 特征的子集有条件依赖,其余的特征是有条件的独立的。 条件独立的特征用于训练将候选区域分类为病变或非损伤的朴素贝叶斯分类器。 从训练图像确定与条件相关特征建模的联合概率分布以及与病变相关联的候选区域的先验概率概率。 从初始贝叶斯分类器,联合概率分布和先验概率概率比构成新的分类器。
    • 9. 发明授权
    • Plane-by-plane iterative reconstruction for digital breast tomosynthesis
    • 用于数字乳房断层合成的平面迭代重建
    • US08594407B2
    • 2013-11-26
    • US13365451
    • 2012-02-03
    • Anna JerebkoKoen MichielsenJohan Nuyts
    • Anna JerebkoKoen MichielsenJohan Nuyts
    • G06K9/00A61B6/00
    • G06T11/006G06T2211/424G06T2211/436
    • A method for digitally reconstructing a 3-dimensional tomosynthesis image by iterative reconstruction, a reconstructor, and a computer program product method are capable of plane-by-plane iterative reconstruction for digital breast tomosynthesis. The reconstruction process is based on a grouped coordinate ascent algorithm where the volume is split into a plurality of patches, wherein all patches are parallel to a surface of a detector. Splitting the volume allows implementing a modified model for image acquisition where the physical movement of the x-ray source is taken into account because each of the patches is updated separately and sequentially. In addition the splitting allows an efficient implementation on a graphical processing unit by reducing memory requirements.
    • 通过迭代重建数字重建三维断层合成图像的方法,重建器和计算机程序产品方法能够进行数字乳房层析合成的平面迭代重建。 重建过程基于分组的坐标上升算法,其中体积被分成多个斑块,其中所有斑块平行于检测器的表面。 拆分音量允许实现用于图像采集的修改模型,其中考虑x射线源的物理移动,因为每个补丁被单独和顺序地更新。 此外,拆分允许通过减少内存要求在图形处理单元上有效地实现。
    • 10. 发明授权
    • System and method for organ segmentation using surface patch classification in 2D and 3D images
    • 在2D和3D图像中使用表面贴片分类进行器官分割的系统和方法
    • US08135189B2
    • 2012-03-13
    • US12243327
    • 2008-10-01
    • Anna JerebkoMatthias Wolf
    • Anna JerebkoMatthias Wolf
    • G06K9/00
    • G06T17/20G06T7/12G06T7/149G06T2207/10072G06T2207/20081G06T2207/20124G06T2207/30004
    • A method for segmenting organs in digitized medical images includes providing a set of segmented training images of an organ, computing a surface mesh having a plurality of mesh cells that approximates a border of the organ, extracting positive examples of all mesh cells and negative examples in the neighborhood of each mesh cell which do not belong to the organ surface, training from the positive examples and negative examples a plurality of classifiers for outputting a probability of a point being a center of a particular mesh cell, computing an active shape model using a subset of center points in the mesh cells, generating a new shape by iteratively deforming the active shape model to fit a test image, and using the classifiers to calculate a probability of each center point of the new shape being a center of a mesh cell which the classifier was trained to recognize.
    • 用于在数字化医学图像中分割器官的方法包括提供一组器官的分割训练图像,计算具有近似器官边界的多个网格细胞的表面网格,提取所有网孔细胞的阳性实例和阴性实例 不属于器官表面的每个网格单元的邻域,从正面示例和负面示例中训练多个分类器,用于输出点是特定网格单元格的中心的概率,使用 网格单元中的中心点的子集,通过迭代地使活动形状模型变形以拟合测试图像来生成新形状,并且使用分类器来计算新形状的每个中心点是网格单元格的中心的概率, 分类器被训练认识。