利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

57 条记录 (耗时 0.034 秒)

    Method and system for image data acquisition
    4.
    发明授权
    Method and system for image data acquisition 有权
    图像数据采集方法和系统

    公开(公告)号：US08160200B2

    公开(公告)日：2012-04-17

    申请号：US12750050

    申请日：2010-03-30

    申请人： John Eric Tkaczyk ,  David Allen Langan ,  Samit Kumar Basu ,  Xiaoye Wu ,  Bruno Kristiaan Bernard De Man ,  Jeffrey Seymour Gordon

    发明人： John Eric Tkaczyk ,  David Allen Langan ,  Samit Kumar Basu ,  Xiaoye Wu ,  Bruno Kristiaan Bernard De Man ,  Jeffrey Seymour Gordon

    IPC分类号： H05G1/26

    CPC分类号： A61B6/4035 ,  A61B6/032 ,  A61B6/405 ,  A61B6/4241 ,  A61B6/482 ,  A61B6/488 ,  A61B6/542

    摘要： A technique for acquiring desired image data in an imaging system comprising at least one radiation source and a detector is described. Initially, preliminary image data corresponding to an object may be acquired. Further, at least one parameter associated with the radiation source and corresponding to a particular view angle of the radiation source may be determined based on the preliminary image data and a priori information. Similarly, at least one parameter associated with the detector and corresponding to the particular view angle may be determined based on a priori information and the preliminary image data. Efficient operating modes of the radiation source and the detector corresponding to the particular view angle may be selected based on the determined parameters to achieve a desired system performance. Subsequently, the final image data may be acquired using the selected operating modes of the radiation source and the detector.

    摘要翻译： 描述了在包括至少一个辐射源和检测器的成像系统中获取所需图像数据的技术。 首先，可以获取与对象相对应的初步图像数据。 此外，可以基于初步图像数据和先验信息来确定与辐射源相关联并且对应于辐射源的特定视角的至少一个参数。 类似地，可以基于先验信息和初步图像数据来确定与检测器相关联并且对应于特定视角的至少一个参数。 可以基于确定的参数来选择对应于特定视角的辐射源和检测器的有效操作模式以实现期望的系统性能。 随后，可以使用所选择的辐射源和检测器的操作模式来获取最终图像数据。

    Method and apparatus for calibrating volumetric computed tomography systems
    6.
    发明授权
    Method and apparatus for calibrating volumetric computed tomography systems 失效
    用于校准体积计算机断层摄影系统的方法和装置

    公开(公告)号：US07016456B2

    公开(公告)日：2006-03-21

    申请号：US10699087

    申请日：2003-10-31

    申请人： Samit Kumar Basu ,  Peter Michael Edic ,  Bruno Kristiaan Bernard De Man

    发明人： Samit Kumar Basu ,  Peter Michael Edic ,  Bruno Kristiaan Bernard De Man

    IPC分类号： A61B6/03

    CPC分类号： A61B6/583 ,  A61B6/032

    摘要： The present invention provides a method for determining a geometry of a scanning volumetric computed tomographic (CT) system having a rotation axis, a rotational plane, an x-ray source and a detector. The method includes scanning a phantom having a series of spatially separated discrete markers with the scanning volumetric computed tomographic system, wherein the markers are configured on a supporting structure of the phantom so as to permit separate identification of each marker in a collection of projection images. The method further includes locating images of the markers in each projection, using the located marker images to assign marker locations to tracks, and using the assigned tracks, determining a relative alignment between the detector, the source, and the rotation axis of the scanning volumetric computed tomographic system.

    摘要翻译： 本发明提供了一种用于确定具有旋转轴，旋转平面，x射线源和检测器的扫描体积计算机断层摄影（CT）系统的几何形状的方法。 该方法包括用扫描体积计算机断层摄影系统扫描具有一系列空间分离的离散标记的体模，其中标记被配置在体模的支撑结构上，以允许在投影图像的集合中单独识别每个标记。 该方法还包括使用定位的标记图像将标记的图像定位在每个投影中，以将标记位置分配给轨迹，并使用分配的轨迹，确定扫描体积的检测器，源和旋转轴之间的相对对准 计算机断层摄影系统。

    METHOD AND SYSTEM FOR IMAGE DATA ACQUISITION
    7.
    发明申请
    METHOD AND SYSTEM FOR IMAGE DATA ACQUISITION 有权
    用于图像数据采集的方法和系统

    公开(公告)号：US20110243413A1

    公开(公告)日：2011-10-06

    申请号：US12750050

    申请日：2010-03-30

    申请人： John Eric Tkaczyk ,  David Allen Langan ,  Samit Kumar Basu ,  Xiaoye Wu ,  Bruno Kristiaan Bernard De Man ,  Jeffrey Seymour Gordon

    发明人： John Eric Tkaczyk ,  David Allen Langan ,  Samit Kumar Basu ,  Xiaoye Wu ,  Bruno Kristiaan Bernard De Man ,  Jeffrey Seymour Gordon

    IPC分类号： G06K9/00 ,  G01N23/04 ,  H05G1/60

    CPC分类号： A61B6/4035 ,  A61B6/032 ,  A61B6/405 ,  A61B6/4241 ,  A61B6/482 ,  A61B6/488 ,  A61B6/542

    摘要： A technique for acquiring desired image data in an imaging system comprising at least one radiation source and a detector is described. Initially, preliminary image data corresponding to an object may be acquired. Further, at least one parameter associated with the radiation source and corresponding to a particular view angle of the radiation source may be determined based on the preliminary image data and a priori information. Similarly, at least one parameter associated with the detector and corresponding to the particular view angle may be determined based on a priori information and the preliminary image data. Efficient operating modes of the radiation source and the detector corresponding to the particular view angle may be selected based on the determined parameters to achieve a desired system performance. Subsequently, the final image data may be acquired using the selected operating modes of the radiation source and the detector.

    摘要翻译： 描述了在包括至少一个辐射源和检测器的成像系统中获取所需图像数据的技术。 首先，可以获取与对象相对应的初步图像数据。 此外，可以基于初步图像数据和先验信息来确定与辐射源相关联并且对应于辐射源的特定视角的至少一个参数。 类似地，可以基于先验信息和初步图像数据来确定与检测器相关联并且对应于特定视角的至少一个参数。 可以基于确定的参数来选择对应于特定视角的辐射源和检测器的有效操作模式以实现期望的系统性能。 随后，可以使用所选择的辐射源和检测器的操作模式来获取最终图像数据。

    Method and system for efficient helical cone-beam reconstruction
    8.
    发明授权
    Method and system for efficient helical cone-beam reconstruction 有权
    高效螺旋锥束重建方法与系统

    公开(公告)号：US07379525B2

    公开(公告)日：2008-05-27

    申请号：US11011358

    申请日：2004-12-15

    申请人： Samit Kumar Basu ,  Bruno Kristiaan Bernard De Man

    发明人： Samit Kumar Basu ,  Bruno Kristiaan Bernard De Man

    IPC分类号： A61B6/03

    CPC分类号： A61B6/032 ,  A61B6/027 ,  G01N23/046 ,  G01N2223/3304 ,  G01N2223/419 ,  Y10S378/901

    摘要： A method for reconstructing cone-beam projection data is provided. The method comprises scanning an object in helical mode, wherein the scanning comprises obtaining cone-beam projection data. The method further comprises processing the cone-beam projection data along a plurality of data filtering curves. The processing includes processing the cone-beam projection data along a portion of the data filtering curves that extends outside of a physical detector area to a virtual detector area. Then, the method comprises using the processed cone-beam projection data in the generation of a reconstructed image of the object.

    摘要翻译： 提供了一种重建锥束投影数据的方法。 该方法包括以螺旋模式扫描物体，其中扫描包括获得锥束投影数据。 该方法还包括沿多个数据滤波曲线处理锥形束投影数据。 该处理包括沿着在物理检测器区域外延伸到虚拟检测器区域的数据滤波曲线的一部分处理锥形束投影数据。 然后，该方法包括在生成对象的重建图像时使用经处理的锥束投影数据。

    System and method for image reconstruction
    10.
    发明授权
    System and method for image reconstruction 有权
    图像重建系统和方法

    公开(公告)号：US07376255B2

    公开(公告)日：2008-05-20

    申请号：US10874976

    申请日：2004-06-23

    申请人： Bruno Kristiaan Bernard De Man ,  Peter Michael Edic ,  Samit Kumar Basu

    发明人： Bruno Kristiaan Bernard De Man ,  Peter Michael Edic ,  Samit Kumar Basu

    IPC分类号： G06K9/00 ,  G06K9/40

    CPC分类号： G06T11/005 ,  G06T2211/416 ,  G06T2211/421 ,  Y10S378/901

    摘要： A method for reconstructing image data acquired by a computed tomography system is provided. The method comprises selecting a portion of image data to be reconstructed and determining a corresponding portion of projection data. An adaptive filter is computed and applied to the portion of projection data to generate a portion of adaptively-filtered projection data. The adaptive filter is computed based upon desired quality properties of the portion of image data. Finally, the portion of image data is reconstructed based upon the portion of adaptively-filtered projection data. The step of selecting, computing and reconstructing is repeated for every pixel or group of pixels comprising the image data.

    摘要翻译： 提供了一种重建由计算机断层摄影系统获取的图像数据的方法。 该方法包括选择要重建的图像数据的一部分并确定投影数据的对应部分。 计算自适应滤波器并将其应用于投影数据的一部分以生成自适应滤波投影数据的一部分。 基于图像数据部分的期望质量特性来计算自适应滤波器。 最后，基于自适应滤波投影数据的部分重建图像数据的部分。 对于包括图像数据的每个像素或像素组重复选择，计算和重建的步骤。