Method and system for left ventricle detection in 2D magnetic resonance images using ranking based multi-detector aggregation
    52.
    发明授权
    Method and system for left ventricle detection in 2D magnetic resonance images using ranking based multi-detector aggregation 有权
    使用基于排序的多检测器聚合的2D磁共振图像中左心室检测的方法和系统

    公开(公告)号:US08340385B2

    公开(公告)日:2012-12-25

    申请号:US12630061

    申请日:2009-12-03

    IPC分类号: G06K9/00

    摘要: A method and system for left ventricle (LV) detection in 2D magnetic resonance imaging (MRI) images is disclosed. In order to detect the LV in a 2D MRI image, a plurality of LV candidates are detected, for example using marginal space learning (MSL) based detection. Candidates for distinctive anatomic landmarks associated with the LV are then detected in the 2D MRI image. In particular, apex candidates and base candidates are detected in the 2D MRI image. One of the LV candidates is selected as a final LV detection result by ranking the LV candidates based on the LV candidates, the apex candidates, and the base candidates using a trained ranking model.

    摘要翻译: 公开了一种用于2D磁共振成像(MRI)图像中左心室(LV)检测的方法和系统。 为了检测2D MRI图像中的LV,例如使用基于边缘空间学习(MSL)的检测来检测多个LV候选。 然后在2D MRI图像中检测与LV相关的特征性解剖学标记的候选者。 特别地,在2D MRI图像中检测到顶点候选和基础候选。 通过使用训练排名模型,基于LV候选,顶点候选和基础候选对LV候选进行排名,将LV候选者中的一个选择为最终的LV检测结果。

    Method and system for left ventricle endocardium surface segmentation using constrained optimal mesh smoothing
    55.
    发明授权
    Method and system for left ventricle endocardium surface segmentation using constrained optimal mesh smoothing 失效
    使用约束最优网格平滑的左心室心内膜表面分割的方法和系统

    公开(公告)号:US08150119B2

    公开(公告)日:2012-04-03

    申请号:US12319686

    申请日:2009-01-09

    IPC分类号: G06K9/34 G06T15/00

    摘要: A method and system for left ventricle (LV) endocardium surface segmentation using constrained optimal mesh smoothing is disclosed. The LV endocardium surface in the 3D cardiac volume is initially segmented in a 3D cardiac volume, such as a CT volume, resulting in an LV endocardium surface mesh. A smoothed LV endocardium surface mesh is generated by smoothing the LV endocardium surface mesh using constrained optimal mesh smoothing. The constrained optimal mesh smoothing determines an optimal adjustment for each point on the LV endocardium surface mesh by minimizing an objective function based at least on a smoothness measure, subject to a constraint bounding the adjustment for each point. The adjustment for each point can be constrained to prevent adjustments inward toward the blood pool in order to ensure that the smoothed LV endocardium surface mesh encloses the entire blood pool.

    摘要翻译: 公开了使用约束最优网格平滑的左心室(LV)心内膜表面分割的方法和系统。 3D心脏体积中的LV心内膜表面最初在3D心脏体积(例如CT体积)中分段,导致LV心内膜表面网。 通过使用约束最优网格平滑平滑LV心内膜表面网格来生成平滑的LV心内膜表面网格。 受约束的最优网格平滑通过使至少基于平滑度量度的目标函数最小化来限制LV心内膜表面网格上的每个点的最佳调整,受限于对每个点的调整。 可以限制每个点的调整以防止向血液向内的调节,以确保平滑的LV心内膜表面网格包围整个血液池。

    Method and System for Virtual Percutaneous Valve Implantation
    56.
    发明申请
    Method and System for Virtual Percutaneous Valve Implantation 审中-公开
    虚拟经皮瓣植入术的方法与系统

    公开(公告)号:US20110153286A1

    公开(公告)日:2011-06-23

    申请号:US12975714

    申请日:2010-12-22

    IPC分类号: G06F17/50

    摘要: A method and system for virtual percutaneous valve implantation is disclosed. A patient-specific anatomical model of a heart valve is estimated based on 3D cardiac medical image data and an implant model representing a valve implant is virtually deployed into the patient-specific anatomical model of the heart valve. A library of implant models, each modeling geometrical properties of a corresponding valve implant, is maintained. The implant models maintained in the library are virtually deployed into the patient specific anatomical model of the heart valve to select an implant type and size and deployment location and orientation for percutaneous valve implantation.

    摘要翻译: 公开了一种用于虚拟经皮瓣植入的方法和系统。 基于3D心脏医学图像数据估计心脏瓣膜的患者特异性解剖模型,并且代表瓣膜植入物的植入模型实际上部署到心脏瓣膜的患者特异性解剖模型中。 植入物模型库,每个建模相应的阀门植入物的几何特性被维持。 维护在库中的植入物模型实际上部署到心脏瓣膜的患者特异性解剖模型中,以选择用于经皮瓣膜植入的植入物类型和尺寸以及部署位置和取向。

    Method and System for Detecting 3D Anatomical Structures Using Constrained Marginal Space Learning
    57.
    发明申请
    Method and System for Detecting 3D Anatomical Structures Using Constrained Marginal Space Learning 有权
    使用约束边际空间学习检测3D解剖结构的方法和系统

    公开(公告)号:US20090304251A1

    公开(公告)日:2009-12-10

    申请号:US12471761

    申请日:2009-05-26

    IPC分类号: G06K9/00

    摘要: A method and apparatus for detecting 3D anatomical objects in medical images using constrained marginal space learning (MSL) is disclosed. A constrained search range is determined for an input medical image volume based on training data. A first trained classifier is used to detect position candidates in the constrained search range. Position-orientation hypotheses are generated from the position candidates using orientation examples in the training data. A second trained classifier is used to detect position-orientation candidates from the position-orientation hypotheses. Similarity transformation hypotheses are generated from the position-orientation candidates based on scale examples in the training data. A third trained classifier is used to detect similarity transformation candidates from the similarity transformation hypotheses, and the similarity transformation candidates define the position, translation, and scale of the 3D anatomic object in the medical image volume.

    摘要翻译: 公开了一种使用受限边际空间学习(MSL)检测医学图像中3D解剖学对象的方法和装置。 基于训练数据确定输入医学图像体积的约束搜索范围。 第一训练分类器用于检测约束搜索范围内的位置候选。 使用训练数据中的取向示例从位置候选者生成位置取向假设。 第二训练分类器用于从位置定向假设检测位置方向候选。 基于训练数据中的比例示例,从位置定位候选生成相似度转换假设。 第三训练分类器用于从相似变换假设检测相似变换候选,并且相似变换候选定义医学图像体积中的3D解剖对象的位置,平移和比例。

    Method and system for generating a four-chamber heart model
    59.
    发明申请
    Method and system for generating a four-chamber heart model 有权
    用于产生四室心脏模型的方法和系统

    公开(公告)号:US20080262814A1

    公开(公告)日:2008-10-23

    申请号:US12082143

    申请日:2008-04-09

    IPC分类号: G06G7/60

    摘要: A method and system for building a statistical four-chamber heart model from 3D volumes is disclosed. In order to generate the four-chamber heart model, each chamber is modeled using an open mesh, with holes at the valves. Based on the image data in one or more 3D volumes, meshes are generated and edited for the left ventricle (LV), left atrium (LA), right ventricle (RV), and right atrium (RA). Resampling to enforce point correspondence is performed during mesh editing. Important anatomic landmarks in the heart are explicitly represented in the four-chamber heart model of the present invention.

    摘要翻译: 公开了一种用于从3D体积构建统计四室心脏模型的方法和系统。 为了产生四腔心脏模型,每个腔室都使用开放的网格进行建模,在阀门处有孔。 基于一个或多个3D体积中的图像数据,为左心室(LV),左心房(LA),右心室(RV)和右心房(RA)生成并编辑网格。 在网格编辑期间执行重新采样以强制点对应。 在本发明的四腔心脏模型中明确地表示心脏中的重要解剖学标志。

    SYSTEM AND METHOD FOR LEARNING RELATIVE DISTANCE IN A SHAPE SPACE USING IMAGE BASED FEATURES
    60.
    发明申请
    SYSTEM AND METHOD FOR LEARNING RELATIVE DISTANCE IN A SHAPE SPACE USING IMAGE BASED FEATURES 有权
    使用基于图像的特征在形状空间中学习相对距离的系统和方法

    公开(公告)号:US20070046696A1

    公开(公告)日:2007-03-01

    申请号:US11464851

    申请日:2006-08-16

    IPC分类号: G09G5/00

    摘要: A system and method for identifying a shape of an anatomical structure in an input image is disclosed. An input image is received and warped using a set of warping templates resulting in a set of warped images. An integral image is calculated for each warped image. Selected features are extracted based on the integral image. A boosted feature score is calculated for the combined selected features for each warped image. The warped images are ranked based on the boosted feature scores. A predetermined number of warped images are selected that have the largest feature scores. Each selected warped image is associated with its corresponding warping template. The corresponding warping templates are associated with stored shape models. The shape of the input image is identified based on the weighted average of the shapes models.

    摘要翻译: 公开了一种用于识别输入图像中的解剖结构的形状的系统和方法。 使用一组翘曲模板接收和扭曲输入图像,产生一组翘曲图像。 为每个弯曲图像计算整体图像。 基于积分图像提取所选特征。 对于每个弯曲图像的组合选定特征,计算提升的特征分数。 翘曲的图像根据提升的特征得分进行排名。 选择具有最大特征分数的预定数量的翘曲图像。 每个选择的变形图像与其相应的翘曲模板相关联。 相应的变形模板与存储的形状模型相关联。 基于形状模型的加权平均值来识别输入图像的形状。