VIRTUAL ENDOSCOPY METHODS AND SYSTEMS
    5.
    发明申请
    VIRTUAL ENDOSCOPY METHODS AND SYSTEMS 审中-公开
    虚拟内镜方法和系统

    公开(公告)号:WO2005036457A3

    公开(公告)日:2008-11-20

    申请号:PCT/US2004033888

    申请日:2004-10-12

    Abstract: Imaging systems and methods for processing and rendering volumetric images of a selected organ for virtual endoscopy applications are provided, which enable visualization and navigation of the imaged organ from within a lumen/cavity of the organ. For example, methods are provided for preparing 3D volumetric images of colons for virtual endoscopy application which do not require administration of oral laxatives or suppositories for patient bowel preparation. In particular, an imaging method which can be implemented for virtual colonoscopy applications, includes a process of obtaining an image dataset comprising image data of a colon (step 11) that is prepared (step 10) to tag regions of colonic residue in a manner that enhances a contrast between tagged regions of colonic residue in a lumen of the colon and a colon wall; segmenting (step 12) a region of interest in the image dataset, the region of interest comprising the colon lumen, the colon wall, and regions of tagged residue in the colon lumen; electronically cleaning (step 13) the tagged residue in the colon lumen using a gradient feature data obtained from the image dataset using a maximum directional gradient feature analysis; and rendering (step 14) a volumetric image comprising an endoluminal view at a region within the imaged colon.

    Abstract translation: 提供用于处理和渲染用于虚拟内窥镜检查应用的所选器官的体积图像的成像系统和方法,其使得能够从器官的腔/腔内可视化和导航成像的器官。 例如,提供了用于制备用于虚拟内窥镜检查应用的冒烟的3D体积图像的方法,其不需要口服泻药或栓剂用于患者肠道准备。 特别地,可以实现用于虚拟结肠镜检查应用的成像方法包括获得包括结肠图像数据(步骤11)的图像数据集的处理(步骤11),其被制备(步骤10),以以下方式标记结肠残基的区域: 增加结肠腔中结肠残留的标记区域与结肠壁之间的对比度; 分割(步骤12)图像数据集中的感兴趣区域,感兴趣区域包括结肠腔,结肠壁和结肠腔中标记残基的区域; 使用最大方向梯度特征分析从图像数据集获得的梯度特征数据电子清洗(步骤13)结肠腔中的标记残基; 以及渲染(步骤14)包括在成像的结肠内的区域的腔内视图的体积图像。

    SYSTEM AND METHOD FOR COMPUTER AIDED POLYP DETECTION
    7.
    发明申请
    SYSTEM AND METHOD FOR COMPUTER AIDED POLYP DETECTION 审中-公开
    用于计算机辅助多边形检测的系统和方法

    公开(公告)号:WO2007002146A3

    公开(公告)日:2007-05-03

    申请号:PCT/US2006024072

    申请日:2006-06-21

    Abstract: In the present methods, the automatic detection of polyps is converted into a 2D pattern recognition problem using conformal mapping and direct volume rendering. The colon surface is first segmented and extracted from the CT data set of the abdomen, which is then mapped to a 2D plane using conformal mapping. Ray casting is used to determine sub-surface density values and the flattened image is rendered using a volume rendering technique with a translucent electronic biopsy transfer function. Polyp candidates are detected by a clustering method which identifies regions of elevated sub-surface density. The potential for false positives is reduced by analyzing the volumetric shape and texture features of the polyp candidate regions.

    Abstract translation: 在目前的方法中,使用共形映射和直接体绘制将息肉的自动检测转换成2D模式识别问题。 首先分割并从腹部的CT数据集中提取结肠表面,然后使用共形映射将其映射到2D平面。 光线投射用于确定亚表面密度值,并且使用具有半透明电子活检传递函数的体积渲染技术来渲染平坦图像。 通过聚类方法来检测候选方案,该方法识别高于地下表面密度的区域。 通过分析息肉候选区域的体积形状和纹理特征来减少假阳性的可能性。

    SYSTEM AND METHOD FOR COMPUTER AIDED POLYP DETECTION
    10.
    发明申请
    SYSTEM AND METHOD FOR COMPUTER AIDED POLYP DETECTION 审中-公开
    计算机辅助聚合物检测系统和方法

    公开(公告)号:WO2007002146A2

    公开(公告)日:2007-01-04

    申请号:PCT/US2006/024072

    申请日:2006-06-21

    Abstract: In the present methods, the automatic detection of polyps is converted into a 2D pattern recognition problem using conformal mapping and direct volume rendering. The colon surface is first segmented and extracted from the CT data set of the abdomen, which is then mapped to a 2D plane using conformal mapping. Ray casting is used to determine sub-surface density values and the flattened image is rendered using a volume rendering technique with a translucent electronic biopsy transfer function. Polyp candidates are detected by a clustering method which identifies regions of elevated sub-surface density. The potential for false positives is reduced by analyzing the volumetric shape and texture features of the polyp candidate regions.

    Abstract translation: 在本方法中,使用保形映射和直接体绘制,将息肉的自动检测转换为2D模式识别问题。 首先将结肠表面分割并从腹部的CT数据集中提取,然后使用保形图映射到2D平面。 Ray铸造用于确定亚表面密度值,并且使用具有半透明电子活检传递函数的体绘制技术来渲染平坦化图像。 通过聚类方法检测Polyp候选物,其识别升高的亚表面密度的区域。 通过分析息肉候选区域的体积形状和纹理特征来减少假阳性的潜力。

Patent Agency Ranking