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    System and method for simultaneously subsampling fluoroscopic images and enhancing guidewire visibility
    1.
    发明授权
    System and method for simultaneously subsampling fluoroscopic images and enhancing guidewire visibility 失效
    同时对透视图像进行二次采样并提高导丝可视性的系统和方法

    公开(公告)号：US07970191B2

    公开(公告)日：2011-06-28

    申请号：US11860591

    申请日：2007-09-25

    申请人： Bogdan Georgescu ,  Peter Durlak ,  Vassilis Athitsos ,  Adrian Barbu ,  Dorin Comaniciu

    发明人： Bogdan Georgescu ,  Peter Durlak ,  Vassilis Athitsos ,  Adrian Barbu ,  Dorin Comaniciu

    IPC分类号： G06K9/00 ,  G06K9/40

    CPC分类号： G06T5/003 ,  G06T5/20 ,  G06T7/74 ,  G06T2207/10121 ,  G06T2207/20016 ,  G06T2207/30021

    摘要： A method for downsampling fluoroscopic images and enhancing guidewire visibility during coronary angioplasty includes providing a first digitized image, filtering the image with one or more steerable filters of different angular orientations, assigning a weight W and orientation O for each pixel based on the filter response for each pixel, wherein each pixel weight is assigned to a function of a maximum filter response magnitude and the pixel orientation is calculated from the angle producing the maximum filter response if the magnitude is greater than zero, wherein guidewire pixels have a higher weight than non-guidewire pixels, and downsampling the orientation and weights to calculate a second image of half the resolution of the first image, wherein the downsampling accounts for the orientation and higher weight assigned to the guidewire pixels.

    摘要翻译： 用于在冠状动脉血管成形术期间对荧光透视图像进行下采样并增强导丝线可视性的方法包括提供第一数字化图像，用一个或多个不同角取向的可转向滤光片过滤图像，基于滤波器响应为每个像素分配权重W和取向O 每个像素，其中每个像素权重被分配给最大滤波器响应幅度的函数，并且如果幅度大于零，则从产生最大滤波器响应的角度计算像素取向，其中导丝像素具有比非最大滤波器响应幅度更大的权重， 引导线像素，以及对取向和权重进行下采样以计算第一图像的分辨率的一半的第二图像，其中下采样考虑分配给导丝像素的取向和较高权重。

    System and method for detecting and tracking a guidewire in a fluoroscopic image sequence
    2.
    发明授权
    System and method for detecting and tracking a guidewire in a fluoroscopic image sequence 有权
    用于在透视图像序列中检测和跟踪导丝的系统和方法

    公开(公告)号：US07792342B2

    公开(公告)日：2010-09-07

    申请号：US11675678

    申请日：2007-02-16

    申请人： Adrian Barbu ,  Vassilis Athitsos ,  Bogdan Georgescu ,  Peter Durlak ,  Stefan Boehm ,  Dorin Comaniciu

    发明人： Adrian Barbu ,  Vassilis Athitsos ,  Bogdan Georgescu ,  Peter Durlak ,  Stefan Boehm ,  Dorin Comaniciu

    IPC分类号： G06K9/00

    CPC分类号： A61B6/12 ,  G06K9/48 ,  G06K2209/057

    摘要： A system and method for populating a database with a set of image sequences of an object is disclosed. The database is used to detect localization of a guidewire in the object. A set of images of anatomical structures is received in which each image is annotated to show a guidewire, catheter, wire tip and stent. For each given image a Probabilistic Boosting Tree (PBT) is used to detect short line segments of constant length in the image. Two segment curves are constructed from the short line segments. A discriminative joint shape and appearance model is used to classify each two segment curve. A shape of an n-segment curve is constructed by concatenating all the two segment curves. A guidewire curve model is identified that includes a start point, end point and the n-segment curve. The guidewire curve model is stored in the database.

    摘要翻译： 公开了一种使用一组对象的图像序列填充数据库的系统和方法。 数据库用于检测对象中导丝的定位。 接收一组解剖结构的图像，其中每个图像被注释以示出导丝，导管，线尖和支架。 对于每个给定的图像，使用概率增强树（PBT）来检测图像中恒定长度的短线段。 从短线段构建两段曲线。 使用歧视关节形状和外观模型对每个两段曲线进行分类。 通过连接所有两个段曲线构建n段曲线的形状。 识别出导线曲线模型，其包括起始点，终点和n段曲线。 导丝曲线模型存储在数据库中。

    System and Method For Simultaneously Subsampling Fluoroscopic Images and Enhancing Guidewire Visibility
    5.
    发明申请
    System and Method For Simultaneously Subsampling Fluoroscopic Images and Enhancing Guidewire Visibility 失效
    同时采样荧光图像和提高导丝可视性的系统和方法

    公开(公告)号：US20080107314A1

    公开(公告)日：2008-05-08

    申请号：US11860591

    申请日：2007-09-25

    申请人： Bogdan Georgescu ,  Peter Durlak ,  Vassilis Athitsos ,  Adrian Barbu ,  Dorin Comaniciu

    发明人： Bogdan Georgescu ,  Peter Durlak ,  Vassilis Athitsos ,  Adrian Barbu ,  Dorin Comaniciu

    IPC分类号： G06K9/00 ,  G06K9/40

    CPC分类号： G06T5/003 ,  G06T5/20 ,  G06T7/74 ,  G06T2207/10121 ,  G06T2207/20016 ,  G06T2207/30021

    摘要： A method for downsampling fluoroscopic images and enhancing guidewire visibility during coronary angioplasty includes providing a first digitized image, filtering the image with one or more steerable filters of different angular orientations, assigning a weight W and orientation O for each pixel based on the filter response for each pixel, wherein each pixel weight is assigned to a function of a maximum filter response magnitude and the pixel orientation is calculated from the angle producing the maximum filter response if the magnitude is greater than zero, wherein guidewire pixels have a higher weight than non-guidewire pixels, and downsampling the orientation and weights to calculate a second image of half the resolution of the first image, wherein the downsampling accounts for the orientation and higher weight assigned to the guidewire pixels.

    摘要翻译： 用于在冠状动脉血管成形术期间对荧光透视图像进行下采样并增强导丝线可视性的方法包括提供第一数字化图像，用一个或多个不同角取向的可转向滤光片过滤图像，基于滤波器响应为每个像素分配权重W和取向O 每个像素，其中每个像素权重被分配给最大滤波器响应幅度的函数，并且如果幅度大于零，则从产生最大滤波器响应的角度计算像素取向，其中导丝像素具有比非最大滤波器响应幅度更大的权重， 引导线像素，以及对取向和权重进行下采样以计算第一图像的分辨率的一半的第二图像，其中下采样考虑分配给导丝像素的取向和较高权重。

    System and Method For Detecting and Tracking A Guidewire In A Fluoroscopic Image Sequence
    6.
    发明申请
    System and Method For Detecting and Tracking A Guidewire In A Fluoroscopic Image Sequence 有权
    用于检测和跟踪荧光透视图像序列中的导丝的系统和方法

    公开(公告)号：US20070270692A1

    公开(公告)日：2007-11-22

    申请号：US11675678

    申请日：2007-02-16

    申请人： Adrian Barbu ,  Vassilis Athitsos ,  Bogdan Georgescu ,  Stefan Boehm ,  Peter Durlak ,  Dorin Comaniciu

    发明人： Adrian Barbu ,  Vassilis Athitsos ,  Bogdan Georgescu ,  Stefan Boehm ,  Peter Durlak ,  Dorin Comaniciu

    IPC分类号： A61B6/00

    CPC分类号： A61B6/12 ,  G06K9/48 ,  G06K2209/057

    摘要： A system and method for populating a database with a set of image sequences of an object is disclosed. The database is used to detect localization of a guidewire in the object. A set of images of anatomical structures is received in which each image is annotated to show a guidewire, catheter, wire tip and stent. For each given image a Probabilistic Boosting Tree (PBT) is used to detect short line segments of constant length in the image. Two segment curves are constructed from the short line segments. A discriminative joint shape and appearance model is used to classify each two segment curve. A shape of an n-segment curve is constructed by concatenating all the two segment curves. A guidewire curve model is identified that includes a start point, end point and the n-segment curve. The guidewire curve model is stored in the database.

    摘要翻译： 公开了一种使用一组对象的图像序列填充数据库的系统和方法。 数据库用于检测对象中导丝的定位。 接收一组解剖结构的图像，其中每个图像被注释以示出导丝，导管，线尖和支架。 对于每个给定的图像，使用概率增强树（PBT）来检测图像中恒定长度的短线段。 从短线段构建两段曲线。 使用歧视关节形状和外观模型对每个两段曲线进行分类。 通过连接所有两个段曲线构建n段曲线的形状。 识别出导线曲线模型，其包括起始点，终点和n段曲线。 导丝曲线模型存储在数据库中。