System and method for detecting an object
    2.
    发明申请
    System and method for detecting an object 有权
    用于检测物体的系统和方法

    公开(公告)号:US20050031075A1

    公开(公告)日:2005-02-10

    申请号:US10743195

    申请日:2003-12-22

    IPC分类号: G01V5/00 G01N23/04

    摘要: A system and method for ascertaining the identity of an object within an enclosed article. The system includes an acquisition subsystem utilizing a stationary radiation source and detector, a reconstruction subsystem, a computer-aided detection (CAD) subsystem, and a 2D/3D visualization subsystem. The detector may be an energy discriminating detector. The acquisition subsystem communicates view data to the reconstruction subsystem, which reconstructs it into image data and communicates it to the CAD subsystem. The CAD subsystem analyzes the image data to ascertain whether it contains any area of interest. Any such area of interest data is sent to the reconstruction subsystem for further reconstruction, using more rigorous algorithms and further analyzed by the CAD subsystem. Other information, such as risk variables or trace chemical detection information may be communicated to the CAD subsystem to be included in its analysis.

    摘要翻译: 用于确定封闭物品内物体的身份的系统和方法。 该系统包括利用固定辐射源和检测器,重建子系统,计算机辅助检测(CAD)子系统和2D / 3D可视化子系统的采集子系统。 检测器可以是能量识别检测器。 采集子系统将视图数据传送到重建子系统,将其重建为图像数据并将其传送到CAD子系统。 CAD子系统分析图像数据,以确定它是否包含任何感兴趣的区域。 任何这样的感兴趣的数据区域被发送到重建子系统以进一步重建,使用更严格的算法并由CAD子系统进一步分析。 其他信息,例如风险变量或痕量化学检测信息可以传达给CAD子系统以包含在其分析中。

    System and method for computing volumetric perfusion
    5.
    发明申请
    System and method for computing volumetric perfusion 有权
    计算体积灌注的系统和方法

    公开(公告)号:US20050169420A1

    公开(公告)日:2005-08-04

    申请号:US11095437

    申请日:2005-03-31

    摘要: A method for computing volumetric perfusion using a computed tomography imaging (CT) system is presented. The method includes irradiating a spatially dynamic object within a field of view of the computed tomography imaging system for requisite view angle positions of the gantry. Furthermore, the method includes operating the computed tomography imaging system in a continuous data acquisition mode to acquire projection data representative of the spatially dynamic object. In addition, the method includes processing the projection data to generate time-resolved projection data. Reconstructions are generated using the time-resolved projection data. Additionally, the method includes computing the volumetric perfusion in the spatially dynamic object using the reconstructed data. Computer-readable medium that afford functionality of the type defined by this method is also contemplated in conjunction with the present technique.

    摘要翻译: 提出了一种使用计算机断层摄影(CT)系统计算体积灌注的方法。 该方法包括在计算机断层摄影成像系统的视场内照射台架的必要视角位置照射空间动态物体。 此外,该方法包括以连续数据获取模式操作计算机断层成像系统以获取表示空间动态对象的投影数据。 此外,该方法包括处理投影数据以产生时间分辨投影数据。 使用时间分辨投影数据生成重建。 此外,该方法包括使用重建的数据来计算空间动态对象中的体积灌注。 提供由该方法定义的类型的功能的计算机可读介质也结合本技术考虑。

    Method and apparatus for correcting motion in image reconstruction
    6.
    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

    IPC分类号: A61B6/00

    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。

    System and method for image reconstruction
    8.
    发明申请
    System and method for image reconstruction 有权
    图像重建系统和方法

    公开(公告)号:US20050286749A1

    公开(公告)日:2005-12-29

    申请号:US10874976

    申请日:2004-06-23

    IPC分类号: G06K9/00 G06K9/40

    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。

    Method and apparatus for calibrating volumetric computed tomography systems
    9.
    发明申请
    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:US20050094771A1

    公开(公告)日:2005-05-05

    申请号:US10699087

    申请日:2003-10-31

    IPC分类号: A61B6/00 A61B6/03 G01D18/00

    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。

    Apparatus and method for hybrid computed tomography imaging
    10.
    发明申请
    Apparatus and method for hybrid computed tomography imaging 审中-公开
    混合计算机断层成像的装置和方法

    公开(公告)号:US20070205367A1

    公开(公告)日:2007-09-06

    申请号:US11365791

    申请日:2006-03-01

    IPC分类号: G01T1/161

    摘要: A system is presented. The system includes a plurality of energy integrating detector elements configured to acquire energy integrating data. Further, the system includes a plurality of energy discriminating detector elements configured to acquire energy discriminating data, where the plurality of energy integrating detector elements and the plurality of energy discriminating detector elements are arranged in a spatial relationship to form a hybrid detector, and where the plurality of energy integrating detector elements and the plurality of energy discriminating detector elements are configured to obtain respective sets of energy integrating data and energy discriminating data for use in generating an image.

    摘要翻译: 提出了一个系统。 该系统包括被配置为获取能量积分数据的多个能量积分检测器元件。 此外,该系统包括多个能量鉴别检测器元件,其被配置为获取能量鉴别数据,其中多个能量积分检测器元件和多个能量鉴别检测器元件以空间关系排列以形成混合检测器,并且其中 多个能量积分检测器元件和多个能量鉴别检测器元件被配置为获得积分数据的能量集合和用于生成图像的能量鉴别数据。