Method and system to generate object image slices
    11.
    发明申请
    Method and system to generate object image slices 有权
    生成对象图像切片的方法和系统

    公开(公告)号:US20070183564A1

    公开(公告)日:2007-08-09

    申请号:US11345918

    申请日:2006-02-02

    CPC分类号: A61B6/465 A61B6/025

    摘要: A method for creating a variable slice thickness for displaying an imaged object is disclosed. The method includes acquiring a plurality of projection images from a plurality of different projection angles within a defined sweep angle, reconstructing a plurality of object images from the plurality of projection images, each object image having a first slice thickness, and applying a function rule to combine images, whole images or portions thereof or attributes thereof, of the plurality of projection images, of the plurality of object images, or of both, thereby providing for the display of the object utilizing a second slice thickness that varies from the first slice thickness.

    摘要翻译: 公开了一种用于创建用于显示成像对象的可变切片厚度的方法。 该方法包括从定义的扫描角度内的多个不同投影角度获取多个投影图像,从多个投影图像重构多个对象图像,每个对象图像具有第一切片厚度,并将功能规则应用于 组合多个投影图像中的多个对象图像或两者的图像,整个图像或其部分或其属性,从而利用从第一切片厚度变化的第二切片厚度来提供对象的显示 。

    Adaptive gradient weighting technique for detector bad cell correction
    12.
    发明授权
    Adaptive gradient weighting technique for detector bad cell correction 有权
    用于检测器坏细胞校正的自适应梯度加权技术

    公开(公告)号:US08699811B2

    公开(公告)日:2014-04-15

    申请号:US13009584

    申请日:2011-01-19

    申请人: Baojun Li Jiang Hsieh

    发明人: Baojun Li Jiang Hsieh

    IPC分类号: G06K9/40

    CPC分类号: G01T1/2985

    摘要: An imaging system includes a two-dimensional detector having a plurality of cells wherein each cell is configured to detect energy or signal passing through an object. The imaging system includes a computer programmed to acquire imaging data for the plurality of cells, identify a cell to be corrected, based on the imaging data, interpolate Ix and Iy for the identified cell based on neighbor cells, and calculate local gradients gx and gy between the identified cell and its neighbor cells based on the interpolation. The computer is further programmed to calculate weighting factors wx and wy based on the local gradients, calculate a corrected final value I(0,0) for the identified cell, and correct the identified cell with the corrected final value.

    摘要翻译: 成像系统包括具有多个单元的二维检测器,其中每个单元被配置为检测通过物体的能量或信号。 成像系统包括被编程为采集多个单元的成像数据的计算机,基于成像数据识别要校正的单元,基于相邻单元对所识别的单元插值Ix和Iy,并计算局部梯度gx和gy 基于内插,在所识别的小区及其相邻小区之间。 计算机还被编程为基于局部梯度计算加权因子wx和wy,计算所识别的单元的校正后的最终值I(0,0),并用校正的最终值校正所识别的单元。

    Systems, methods and apparatus for filtered back-projection reconstruction in digital tomosynthesis
    15.
    发明授权
    Systems, methods and apparatus for filtered back-projection reconstruction in digital tomosynthesis 有权
    用于数字断层合成过滤反投影重建的系统,方法和装置

    公开(公告)号:US07522755B2

    公开(公告)日:2009-04-21

    申请号:US11069308

    申请日:2005-03-01

    IPC分类号: G06K9/00

    摘要: Systems, methods and apparatus are provided through which a specialized back-projection process reconstructs a finely detailed and crisp three-dimensional image (3-D) from a series of two-dimensional (2-D) images by pre-filtering the 2-D images with a first group of settings before back-projecting the 2-D images into a 3-D image, and then post-filtering the 3-D image with another group of settings. In some embodiments, the first group of settings and the second group of settings are synergistically optimized in relation to each other to provide emphasis on a structure of interest in the object.

    摘要翻译: 提供了系统,方法和装置,通过该系统,方法和装置,专门的反投影处理通过对2-维图像进行预滤波来重建来自一系列二维(2-D)图像的精细细节和清晰的三维图像(3-D) D图像具有第一组设置,然后将2D图像反投影到3-D图像中,然后用另一组设置对3-D图像进行后置滤波。 在一些实施例中,第一组设置和第二组设置协同地相互优化以提供对对象中感兴趣的结构的强调。

    Systems, methods and apparatus for specialized filtered back-projection reconstruction for digital tomosynthesis
    17.
    发明申请
    Systems, methods and apparatus for specialized filtered back-projection reconstruction for digital tomosynthesis 有权
    用于数字断层合成的专门滤波反投影重建的系统,方法和装置

    公开(公告)号:US20050265590A1

    公开(公告)日:2005-12-01

    申请号:US10859423

    申请日:2004-06-01

    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. The specialized filter implements a linear ramp function, a windowing function, and/or a polynomial function. 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。 专用滤波器实现线性斜坡函数,加窗函数和/或多项式函数。 3D图像从经滤波的二维图像中反投影,产生3D图像,其改善了重叠解剖结构的视觉区别并减少了模糊。

    Non-uniform view weighting tomosynthesis method and apparatus
    18.
    发明申请
    Non-uniform view weighting tomosynthesis method and apparatus 有权
    非均匀视图加权层析合成方法和装置

    公开(公告)号:US20050111616A1

    公开(公告)日:2005-05-26

    申请号:US10723034

    申请日:2003-11-26

    摘要: A technique is provided for non-uniform weighting in back-projection calculations in tomosythesis. The non-uniform weighting may include weighting based on a count map of the number of times pixels of individual slices are traversed by radiation in different projections. Weighting may also include non-uniform functions for contributions of features at different slice level to the sensed X-ray attenuation system response inconsistencies are accounted for by further weighting based upon projection maps which may be created in separate system calibration or configuration routines.

    摘要翻译: 提供了一种技术,用于在重构运算中的反投影计算中的不均匀加权。 不均匀加权可以包括基于不同投影中的辐射遍历各个切片的像素的次数的计数图的加权。 加权还可以包括用于在不同切片级别对感测的X射线衰减系统的特征贡献的不均匀的功能。通过基于可以在单独的系统校准或配置例程中创建的投影图进一步加权来解决不一致性。

    Radiographic tomosynthesis image acquisition utilizing asymmetric geometry
    19.
    发明申请
    Radiographic tomosynthesis image acquisition utilizing asymmetric geometry 有权
    使用不对称几何的射线照相断层合成图像采集

    公开(公告)号:US20050041768A1

    公开(公告)日:2005-02-24

    申请号:US10646023

    申请日:2003-08-22

    摘要: Systems and methods that utilize asymmetric geometry to acquire radiographic tomosynthesis images are described. Embodiments comprise tomosynthesis systems and methods for creating a reconstructed image of an object from a plurality of two-dimensional x-ray projection images. These systems comprise: an x-ray detector; and an x-ray source capable of emitting x-rays directed at the x-ray detector; wherein the tomosynthesis system utilizes asymmetric image acquisition geometry, where θ1≠θ0, during image acquisition, wherein θ1 is a sweep angle on one side of a center line of the x-ray detector, and θ0 is a sweep angle on an opposite side of the center line of the x-ray detector, and wherein the total sweep angle, φasym, is φasym=θ1+θ0. Reconstruction algorithms may be utilized to produce reconstructed images of the object from the plurality of two-dimensional x-ray projection images.

    摘要翻译: 描述了利用不对称几何来获取放射照相断层合成图像的系统和方法。 实施例包括用于从多个二维X射线投影图像创建对象的重建图像的层析合成系统和方法。 这些系统包括:x射线检测器; 以及能够发射针对x射线检测器的x射线的x射线源; 其中所述断层合成系统在图像采集期间利用不对称图像获取几何形状,其中θ1<θ0,其中θ1是在x射线检测器的中心线的一侧上的扫掠角,θ0是相对侧上的扫掠角 的X射线检测器的中心线,并且其中总扫掠角Phiasym是phiasym = theta1 + theta0。 可以利用重建算法从多个二维x射线投影图像中产生物体的重建图像。

    Multiple X-ray tube system and method of making same
    20.
    发明授权
    Multiple X-ray tube system and method of making same 有权
    多种X射线管系统及其制作方法

    公开(公告)号:US08270562B2

    公开(公告)日:2012-09-18

    申请号:US12642965

    申请日:2009-12-21

    IPC分类号: A61B6/00

    CPC分类号: A61B6/4429 G01T1/2985

    摘要: An imaging system includes a rotatable gantry having an opening therein to receive a subject to be scanned and configured to rotate about a central axis in a rotation direction. The imaging system also includes a first x-ray source coupled to the rotatable gantry at a first position, wherein the first position is offset from the central axis of the rotatable gantry by a first distance. Further, the imaging system includes a second x-ray source coupled to the rotatable gantry at a second position, wherein the second position is offset from the central axis of the rotatable gantry by a second distance, wherein the second position is offset from the first position in a direction coincident with the rotation direction, and wherein the second position is offset from the first position in a direction parallel to the central axis.

    摘要翻译: 成像系统包括可旋转机架,其中具有开口,用于接收被扫描的物体并构造为围绕旋转方向的中心轴线旋转。 成像系统还包括在第一位置处联接到可旋转机架的第一x射线源,其中第一位置从可旋转机架的中心轴线偏移第一距离。 此外,成像系统包括在第二位置处联接到可旋转机架的第二x射线源,其中第二位置从可旋转机架的中心轴线偏移第二距离,其中第二位置偏离第一位置 位置在与旋转方向一致的方向上,并且其中第二位置在平行于中心轴线的方向上偏离第一位置。