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    Imaging chain for digital tomosynthesis on a flat panel detector
    1.
    发明申请
    Imaging chain for digital tomosynthesis on a flat panel detector 审中-公开
    用于平板检测器上数字断层合成的成像链

    公开(公告)号：US20060291711A1

    公开(公告)日：2006-12-28

    申请号：US11511656

    申请日：2006-08-29

    申请人： Kadri Jabri ,  Gopal Avinash ,  Stephen Metz ,  John Sabol ,  Jeffrey Eberhard ,  Bernhard Claus ,  John Kaufhold

    发明人： Kadri Jabri ,  Gopal Avinash ,  Stephen Metz ,  John Sabol ,  Jeffrey Eberhard ,  Bernhard Claus ,  John Kaufhold

    IPC分类号： G06K9/00

    CPC分类号： G06T11/008 ,  G06T5/00 ,  G06T11/005 ,  G06T2207/10112 ,  G06T2207/30004 ,  G06T2211/436

    摘要： A method of creating and displaying images resulting from digital tomosynthesis performed on a subject using a flat panel detector is disclosed. The method includes the step of acquiring a series of x-ray images of the subject, where each x-ray image is acquired at different angles relative to the subject. The method also includes the steps of applying a first set of corrective measures to the series of images, reconstructing the series of images into a series of slices through the subject, and applying a second set of corrective measures to the slices. The method further includes the step of displaying the images or slices according to at least one of a plurality of display options.

    摘要翻译： 公开了一种创建和显示使用平板检测器对受试者进行数字断层合成所产生和显示的图像的方法。 该方法包括获取被摄物体的一系列X射线图像的步骤，其中以相对于被摄体的不同角度获取每个X射线图像。 该方法还包括以下步骤：将第一组校正措施应用于一系列图像，将该系列图像重建成通过对象的一系列切片，以及将第二组校正措施应用于切片。 该方法还包括根据多个显示选项中的至少一个显示图像或切片的步骤。

    Non-uniform view weighting tomosynthesis method and apparatus
    2.
    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

    申请人： Baojun Li ,  Bernhard Claus ,  Gopal Avinash ,  Stephen Metz ,  Jiang Hsieh

    发明人： Baojun Li ,  Bernhard Claus ,  Gopal Avinash ,  Stephen Metz ,  Jiang Hsieh

    IPC分类号： A61B6/02 ,  A61B6/03 ,  G06T11/00 ,  G21K1/12 ,  H05G1/60 ,  G01N23/00 ,  A61B6/00 ,  H05G1/00

    CPC分类号： A61B6/025 ,  G06F19/00 ,  G06T11/005 ,  G06T2211/436

    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
    4.
    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

    申请人： Baojun Li ,  Abdulrahman Al-Khalidy ,  Jeffrey Eberhard ,  Stephen Metz ,  Bernhard Claus ,  Vianney Battle

    发明人： Baojun Li ,  Abdulrahman Al-Khalidy ,  Jeffrey Eberhard ,  Stephen Metz ,  Bernhard Claus ,  Vianney Battle

    IPC分类号： A61B6/00 ,  A61B6/02 ,  G01N23/04 ,  G01T1/29 ,  G01T1/00 ,  G01N23/00

    CPC分类号： G01T1/2985 ,  A61B6/025 ,  A61B6/4464 ,  G01N23/044 ,  G01N2223/419 ,  G01N2223/612

    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。

    Methods and apparatus for reconstruction of volume data from projection data
    5.
    发明申请
    Methods and apparatus for reconstruction of volume data from projection data 有权
    用于从投影数据重建体数据的方法和装置

    公开(公告)号：US20050135664A1

    公开(公告)日：2005-06-23

    申请号：US10744882

    申请日：2003-12-23

    申请人： John Kaufhold ,  Bernhard Claus

    发明人： John Kaufhold ,  Bernhard Claus

    IPC分类号： G06K9/00 ,  G06T11/00

    CPC分类号： G06T11/006 ,  G06T2211/424 ,  G06T2211/436

    摘要： Some configurations of method for reconstructing a volumetric image of an object include obtaining a tomosynthesis projection dataset of an object. The method also includes utilizing the tomosynthesis projection dataset and additional information about the object to minimize a selected energy function or functions to satisfy a selected set of constraints. Alternatively, constraints are applied to a reconstructed volumetric image in order to obtain an updated volumetric image. A 3D volume representative of the imaged object is thereby obtained in which each voxel is reconstructed and a correspondence indicated to a single one of the component material classes.

    摘要翻译： 用于重建对象的体积图像的方法的一些配置包括获得对象的断层合成投影数据集。 该方法还包括利用断层合成投影数据集和关于对象的附加信息来最小化所选择的能量函数或满足选定的约束集合的函数。 或者，将约束应用于重建的体积图像，以便获得更新的体积图像。 由此获得代表成像对象的3D体积，其中每个体素被重建，并且对应于对于组件材料类别中的单个元素的对应。

    Tomographic mammography method
    7.
    发明申请
    Tomographic mammography method 有权
    断层摄影术

    公开(公告)号：US20060291618A1

    公开(公告)日：2006-12-28

    申请号：US11511644

    申请日：2006-08-29

    申请人： Jeffrey Eberhard ,  Bernhard Claus ,  Cynthia Landberg ,  Serge Muller ,  Yann Delmas ,  Reinhold Wirth ,  James Morrow

    发明人： Jeffrey Eberhard ,  Bernhard Claus ,  Cynthia Landberg ,  Serge Muller ,  Yann Delmas ,  Reinhold Wirth ,  James Morrow

    IPC分类号： H05G1/60 ,  A61B6/00 ,  G01N23/00 ,  G21K1/12

    CPC分类号： A61B6/025 ,  A61B6/032 ,  A61B6/4014 ,  A61B6/4028 ,  A61B6/4266 ,  A61B6/4429 ,  A61B6/502

    摘要： A tomosynthesis system for forming a three dimensional image of an object is provided. The system includes an X-ray source adapted to irradiate the object with a beam of X-rays from a plurality of positions in a sector, an X-ray detector positioned relative to the X-ray source to detect X-rays transmitted through the object and a processor which is adapted to generate a three dimensional image of the object based on X-rays detected by the detector. The detector is adapted to move relative to the object and/or the X-ray source is adapted to irradiate the object with the beam of X-rays such that the beam of X-rays follows in a non arc shaped path and/or a center of the beam of X-rays impinges substantially on the same location on the detector from different X-ray source positions in the sector.

    摘要翻译： 提供了一种用于形成物体的三维图像的断层合成系统。 该系统包括适于从扇区中的多个位置用X射线照射物体的X射线源，相对于X射线源定位的X射线检测器，以检测通过X射线透射的X射线 对象和处理器，其适于基于由检测器检测到的X射线来生成对象的三维图像。 检测器适于相对于物体移动和/或X射线源适于用X射线束照射物体，使得X射线束在非弧形路径和/或 X射线束的中心基本上在扇区中的不同X射线源位置撞击检测器上的相同位置。

    Method and apparatus for direct reconstuction in tomosynthesis imaging
    8.
    发明申请
    Method and apparatus for direct reconstuction in tomosynthesis imaging 有权
    断层成像成像直接重建的方法和装置

    公开(公告)号：US20060002509A1

    公开(公告)日：2006-01-05

    申请号：US10881649

    申请日：2004-06-30

    申请人： Bernhard Claus ,  Jeffrey Eberhard

    发明人： Bernhard Claus ,  Jeffrey Eberhard

    IPC分类号： A61B6/00

    CPC分类号： G06T11/008 ,  G06T11/005 ,  G06T2211/424 ,  G06T2211/436

    摘要： A technique for directly reconstructing three-dimensional images acquired in tomosynthesis imaging is provided. The method allows for pre-processing a set of projection images based upon the acquisition geometry prior to direct reconstruction of the projection images. Furthermore, the technique allows for post-processing the reconstructed image data as desired to improve image quality. If desired the direct reconstruction process may be iterated a set number of times or until a desired threshold criteria is met, such as regarding image quality.

    摘要翻译： 提供了一种用于直接重建在层析合成成像中获取的三维图像的技术。 该方法允许在直接重建投影图像之前基于采集几何来预处理一组投影图像。 此外，该技术允许根据需要对重建的图像数据进行后处理以提高图像质量。 如果需要，直接重建过程可以迭代一定次数，或者直到满足期望的阈值标准，例如关于图像质量。

    Method and apparatus for correcting motion in image reconstruction
    9.
    发明授权
    Method and apparatus for correcting motion in image reconstruction 有权
    用于校正图像重建中运动的方法和装置

    公开(公告)号：US07782998B2

    公开(公告)日：2010-08-24

    申请号：US11018030

    申请日：2004-12-21

    申请人： David Langan ,  Peter Edic ,  Abdalmajeid Alyassin ,  Bernhard Claus ,  Joseph Manak ,  James V. Miller

    发明人： David Langan ,  Peter Edic ,  Abdalmajeid Alyassin ,  Bernhard Claus ,  Joseph Manak ,  James V. Miller

    IPC分类号： A61B6/00

    CPC分类号： G06T11/005 ,  A61B6/5258 ,  G01N23/046 ,  G01N2223/419 ,  G01N2223/612 ,  G06T7/20 ,  G06T2211/412 ,  G06T2211/436

    摘要： A plurality of projection images are acquired over an angular range during the slow rotation of a C-arm gantry having a source and detector. Phase-specific reconstructions are generated from the plurality of projections, wherein each phase-specific reconstruction is generated generally from projections acquired at or near the respective phase. In one embodiment, a plurality of motion estimates are generated based upon the phase-specific reconstructions. One or more motion-corrected reconstructions may be generated using the respective motion estimates and projections. The motion-corrected reconstructions may be associated to form motion-corrected volume renderings.

    摘要翻译： 在具有源和检测器的C臂架的慢旋转期间，在角度范围内获取多个投影图像。 从多个投影产生相位特定的重建，其中每个相位特定的重建通常来自于在各个相位处或附近获取的投影。 在一个实施例中，基于相位特定重建产生多个运动估计。 可以使用相应的运动估计和投影来生成一个或多个运动校正重建。 可以将运动校正的重建相关联以形成运动校正的体积渲染。