Method and apparatus of radiographic imaging with an energy beam tailored for a subject to be scanned
    91.
    发明授权
    Method and apparatus of radiographic imaging with an energy beam tailored for a subject to be scanned 有权
    使用针对待扫描的被摄体定制的能量束的放射照相成像的方法和装置

    公开(公告)号:US07630477B2

    公开(公告)日:2009-12-08

    申请号:US11831034

    申请日:2007-07-31

    IPC分类号: G21K3/00 A61B6/03

    摘要: A method and apparatus for tailoring the profile of an x-ray beam for radiographic imaging for a specific subject is disclosed. The invention includes a filter assembly having a pair of filters, each of which may be dynamically controlled by a motor assembly during data acquisition. The filters are positionable in the x-ray beam so as to shape the intensity profile of the x-ray beam. In one exemplary embodiment, the filters are dynamically positioned during CT data acquisition based on the shape of the subject. A method of determining the shape of the subject prior to CT data acquisition is also disclosed.

    摘要翻译: 公开了一种用于定制用于特定对象的X射线成像的X射线束的轮廓的方法和装置。 本发明包括具有一对滤波器的滤波器组件,每个滤波器可以在数据采集期间由电机组件动态地控制。 过滤器可以定位在x射线束中,以便形成x射线束的强度分布。 在一个示例性实施例中,基于对象的形状,在CT数据采集期间,滤波器被动态地定位。 还公开了在CT数据采集之前确定对象的形状的方法。

    Method and apparatus for reducing cone beam artifacts using spatially varying weighting functions
    92.
    发明授权
    Method and apparatus for reducing cone beam artifacts using spatially varying weighting functions 有权
    使用空间变化的加权函数减少锥束伪像的方法和装置

    公开(公告)号:US07613275B2

    公开(公告)日:2009-11-03

    申请号:US11305929

    申请日:2005-12-19

    IPC分类号: A61B6/00

    摘要: A method for combining images acquired using helical half-scan imaging comprises identifying an image plane within an overlap region comprising data from first and second view streams representative of first and second cycles of acquired image data. The image plane comprises the same anatomical structure. First and second weighting functions are calculated for first and second images based on first and second tube positions of an x-ray tube. The first and second images correspond to the image plane and are from the first and second view streams, respectively. The first and second tube positions also correspond to the image plane. A weighted image is then formed based on the first and second weighting functions and the first and second images.

    摘要翻译: 一种用于组合使用螺旋半扫描成像获取的图像的方法包括在包括表示所获取的图像数据的第一和第二周期的第一和第二视图流的数据的重叠区域内识别图像平面。 图像平面包括相同的解剖结构。 基于X射线管的第一和第二管位置对第一和第二图像计算第一和第二加权函数。 第一和第二图像分别对应于图像平面并且分别来自第一和第二视图流。 第一和第二管位置也对应于图像平面。 然后基于第一和第二加权函数以及第一和第二图像形成加权图像。

    Correlation-based motion estimation of object to be imaged
    93.
    发明授权
    Correlation-based motion estimation of object to be imaged 有权
    要成像的物体的相关运动估计

    公开(公告)号:US07587022B1

    公开(公告)日:2009-09-08

    申请号:US11277243

    申请日:2006-03-23

    IPC分类号: A61B6/00

    摘要: An imaging system in an example comprises an x-ray source, a detector, a data acquisition system (DAS), and a computer. The x-ray source emits a beam of x-rays toward an object to be imaged. The detector receives x-rays emitted by the x-ray source. The DAS is operably connected to the detector. The computer is operably connected to the DAS and programmed to estimate motion of the object on a correlation-basis and through employment of earlier-collected data.

    摘要翻译: 示例中的成像系统包括x射线源,检测器,数据采集系统(DAS)和计算机。 x射线源向待成像的物体发射一束x射线。 检测器接收x射线源发射的X射线。 DAS可操作地连接到检测器。 计算机可操作地连接到DAS,并被编程以基于相关性估计对象的运动并且通过使用早期收集的数据。

    CT image reconstruction through employment of function that describes interpreted movement of source around particular point of object
    95.
    发明授权
    CT image reconstruction through employment of function that describes interpreted movement of source around particular point of object 有权
    通过使用功能描述CT图像重建,其描述围绕特定物体点的源的解释移动

    公开(公告)号:US07376213B1

    公开(公告)日:2008-05-20

    申请号:US11276301

    申请日:2006-02-23

    IPC分类号: G01N23/00

    摘要: A CT system in an example comprises an x-ray source, a detector, a data acquisition system (DAS), and a computer. The x-ray source emits a beam of x-rays toward an object to be imaged. The detector receives x-rays emitted by the x-ray source. The DAS is operably connected to the detector. The computer is operably connected to the DAS. The computer is programmed to reconstruct a CT image of the object to comprise a plurality of CT images, of a respective plurality of points of the object, through employment of a function that describes how many times a trajectory curve, of an interpretation of relative movement between the x-ray source and the object as that of the x-ray source, goes around each of the plurality of points of the object.

    摘要翻译: 示例中的CT系统包括x射线源,检测器,数据采集系统(DAS)和计算机。 x射线源向待成像的物体发射一束x射线。 检测器接收x射线源发射的X射线。 DAS可操作地连接到检测器。 计算机可操作地连接到DAS。 计算机被编程为通过使用描述相对运动的解释的轨迹曲线的函数的函数来重构对象的CT图像以包括对象的相应多个点的多个CT图像 在X射线源和与X射线源的对象之间,绕过物体的多个点中的每一个。

    SYSTEMS, METHODS AND APPARATUS FOR SPECIALIZED FILTERED BACK-PROJECTION RECONSTRUCTION FOR DIGITAL TOMOSYNTHESIS
    96.
    发明申请
    SYSTEMS, METHODS AND APPARATUS FOR SPECIALIZED FILTERED BACK-PROJECTION RECONSTRUCTION FOR DIGITAL TOMOSYNTHESIS 有权
    用于数字化硅胶的专用过滤后置投影重建的系统,方法和装置

    公开(公告)号:US20080107324A1

    公开(公告)日:2008-05-08

    申请号:US11950418

    申请日:2007-12-04

    IPC分类号: G06K9/00

    摘要: Systems, methods and apparatus are provided through which in one aspect, a three-dimensional (3D) image of an object is constructed from a plurality of two-dimensional (2D) images of the object using a specialized filter. In some embodiments, the specialized filter implements a linear ramp function, a windowing function, and/or a polynomial function. In some embodiments, the 3D image is back-projected from the filtered two-dimensional images, yielding a 3D image that has improved visual distinction of overlapping anatomic structures and reduced blurring.

    摘要翻译: 提供了一种系统,方法和装置,通过该系统,方法和装置,在一个方面,使用专用滤波器从对象的多个二维(2D)图像构建对象的三维(3D)图像。 在一些实施例中,专用滤波器实现线性斜坡函数,加窗函数和/或多项式函数。 在一些实施例中,3D图像从经过滤的二维图像反投影,产生3D重建解剖结构改善的视觉区别并减少模糊。

    Systems and methods for compensating for table sag
    97.
    发明授权
    Systems and methods for compensating for table sag 有权
    用于补偿工作台下垂的系统和方法

    公开(公告)号:US07344306B2

    公开(公告)日:2008-03-18

    申请号:US11172067

    申请日:2005-06-30

    IPC分类号: G01D18/00

    摘要: A method for compensating for table sag is described. The method includes receiving a first dimension of a table, scanning a patient placed on the table to obtain a first data set, generating an image of the table by performing the scanning with the patient on the table, and determining a difference between the first dimension and a second dimension of the table in the image.

    摘要翻译: 描述了一种用于补偿工作台下垂的方法。 该方法包括:接收桌子的第一维度,扫描放置在桌子上的患者以获得第一数据集,通过与患者在桌子上执行扫描来生成桌子的图像,以及确定第一维度之间的差异 以及图像中的表的第二维度。

    Method and apparatus of radiographic imaging with an energy beam tailored for a subject to be scanned
    100.
    发明授权
    Method and apparatus of radiographic imaging with an energy beam tailored for a subject to be scanned 有权
    使用针对待扫描的被摄体定制的能量束的放射照相成像的方法和装置

    公开(公告)号:US07260182B2

    公开(公告)日:2007-08-21

    申请号:US11419851

    申请日:2006-05-23

    IPC分类号: G21K3/00 A61B6/03

    摘要: A method and apparatus for tailoring the profile of an x-ray beam for radiographic imaging for a specific subject is disclosed. The invention includes a filter assembly having a pair of filters, each of which may be dynamically controlled by a motor assembly during data acquisition. The filters are positionable in the x-ray beam so as to shape the intensity profile of the x-ray beam. In one exemplary embodiment, the filters are dynamically positioned during CT data acquisition based on the shape of the subject. A method of determining the shape of the subject prior to CT data acquisition is also disclosed.

    摘要翻译: 公开了一种用于定制用于特定对象的X射线成像的X射线束的轮廓的方法和装置。 本发明包括具有一对滤波器的滤波器组件,每个滤波器可以在数据采集期间由电机组件动态地控制。 过滤器可以定位在x射线束中,以便形成x射线束的强度分布。 在一个示例性实施例中,基于对象的形状,在CT数据采集期间,滤波器被动态地定位。 还公开了在CT数据采集之前确定对象的形状的方法。