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    SPECTRAL IMAGING
    1.
    发明申请
    SPECTRAL IMAGING 审中-公开
    光谱成像

    公开(公告)号：WO2013128336A2

    公开(公告)日：2013-09-06

    申请号：PCT/IB2013051361

    申请日：2013-02-20

    Applicant: KONINKL PHILIPS NV ,  PHILIPS INTELLECTUAL PROPERTY

    Inventor： SCHAEFER DIRK ,  THRAN AXEL ,  KOEHLER THOMAS

    IPC: G01T1/29

    CPC classification number: A61B6/5205 ,  A61B5/0075 ,  A61B6/42 ,  G01T1/2008 ,  G01T1/2985

    Abstract: An imaging system includes radiation source (106) that emits radiation that traverses an examination region and a portion of a subject therein and a detector array (114) that detects radiation that traverses the examination region and the portion of the subject therein and generates a signal indicative thereof. A volume scan parameter recommender (120) recommends at least one spectral scan parameter value for a volume scan of the portion of the subject based on a spectral decomposition of first and second 2D projections acquired by the radiation source and detector array. The first and second 2D projections have different spectral characteristics. A console (122) employs the recommended at least one spectral scan parameter value to perform the volume scan of the portion of the subject.

    Abstract translation: 一种成像系统包括：辐射源（106），其发射穿过检查区域和其中的对象的一部分的辐射;以及检测器阵列（114），其检测穿过检查区域和其中的对象的该部分的辐射并且生成信号 指示其。 体积扫描参数推荐器（120）基于由辐射源和检测器阵列获取的第一和第二2D投影的频谱分解来推荐用于对象的该部分的体积扫描的至少一个频谱扫描参数值。 第一和第二2D投影具有不同的光谱特性。 控制台（122）采用推荐的至少一个光谱扫描参数值来执行对象的该部分的体积扫描。

    IMPROVED RECONSTRUCTION FOR CONE-BEAM COMPUTED TOMOGRAPHY IMAGING WITH OFF-CENTER FLAT PANEL DETECTOR
    6.
    发明申请
    IMPROVED RECONSTRUCTION FOR CONE-BEAM COMPUTED TOMOGRAPHY IMAGING WITH OFF-CENTER FLAT PANEL DETECTOR 审中-公开
    改进用于中心平板检测器的锥束计算机图像成像的重建

    公开(公告)号：WO2011148277A3

    公开(公告)日：2012-02-23

    申请号：PCT/IB2011051793

    申请日：2011-04-25

    Applicant: KONINKL PHILIPS ELECTRONICS NV ,  PHILIPS INTELLECTUAL PROPERTY ,  HANSIS EBERHARD S ,  SCHAEFER DIRK ,  GRASS MICHAEL

    Inventor： HANSIS EBERHARD S ,  SCHAEFER DIRK ,  GRASS MICHAEL

    IPC: G06T11/00

    CPC classification number: G06T11/008 ,  G06T11/006 ,  G06T2211/432

    Abstract: Computed tomography (CT) reconstruction includes reconstructing an axially extended reconstructed image from a measured cone beam x-ray projection data set (Pm), optionally having an off-center geometry. The reconstructing is performed for an extended volume (eFOV) comprising a reconstructable volume (rFOV) of the measured cone beam x ray data set that is extended along the axial direction. The projection data set may be weighted in the volume domain. Iterative reconstruction may be used, including initializing a constant volume and performing one or more iterations employing a first iterative update followed by one or more iterations employing a second, different iterative update. Alternatively, backprojection filtration (BPF) reconstruction may be used, including transforming the projection data set to a new geometry including finite differences between neighboring projection views and performing BPF using Hilbert filtering along a plurality of different directions and averaging the resultant reconstructed images to generate the final reconstructed image.

    Abstract translation: 计算机断层扫描（CT）重建包括从测量的锥形束X射线投影数据集（Pm）重建轴向延伸的重建图像，可选地具有偏心几何。 对包括沿轴向延伸的测量的锥形束x射线数据集的可重建体积（rFOV）的扩展体积（eFOV）进行重建。 投影数据集可以在体积域中加权。 可以使用迭代重建，包括初始化恒定体积并且使用第一迭代更新执行一个或多个迭代，随后使用第二，不同迭代更新的一个或多个迭代。 或者，可以使用反投影过滤（BPF）重建，包括将投影数据集变换为包括相邻投影视图之间的有限差异的新几何，并且使用沿着多个不同方向的希尔伯特滤波来执行BPF，并平均所得到的重建图像以产生 最终重建图像。

    APPARATUS FOR GENERATING AN IMAGE OF MOVING OBJECT
    7.
    发明申请
    APPARATUS FOR GENERATING AN IMAGE OF MOVING OBJECT 审中-公开
    用于生成移动对象的图像的装置

    公开(公告)号：WO2009136360A3

    公开(公告)日：2011-11-10

    申请号：PCT/IB2009051835

    申请日：2009-05-05

    Applicant: KONINKL PHILIPS ELECTRONICS NV ,  PHILIPS INTELLECTUAL PROPERTY ,  JANDT UWE ,  SCHAEFER DIRK ,  GRASS MICHAEL

    Inventor： JANDT UWE ,  SCHAEFER DIRK ,  GRASS MICHAEL

    IPC: G06T11/00 ,  A61B6/00 ,  G06T7/00

    CPC classification number: G06T11/005 ,  G06T7/564 ,  G06T2211/412

    Abstract: The present invention relates to an apparatus for generating an image of a moving object, wherein a movement of the object comprises a multiple of moving phases. The apparatus comprises a measured detection data providing unit (20) for providing measured detection data of the moving object, which have been detected by using a detection process and which are assigned to the moving phases. The apparatus comprises further a reconstruction unit (13) for reconstructing an image object of the object from the provided measured detection data and an adaptation unit (18) for adapting the image object for different moving phases such that simulated detection data are adapted to the measured detection data of the respective moving phase, wherein the simulated detection data are determined by simulating the detection process, which has been used for detecting the measured detection data assigned to the respective moving phase, with the image object.

    Abstract translation: 本发明涉及一种用于生成移动物体的图像的装置，其中物体的移动包括多个移动相位。 该装置包括测量检测数据提供单元（20），用于提供已经通过使用检测处理检测并被分配给运动相位的移动物体的测量检测数据。 所述设备还包括用于根据所提供的测量的检测数据重构对象的图像对象的重建单元（13）和用于使图像对象适应不同的移动阶段的适配单元（18），使得模拟的检测数据适应于所测量的 检测数据，其中通过模拟已经用于检测分配给各个运动相位的测量检测数据的检测过程与图像对象来确定模拟检测数据。

    ITERATIVE RECONSTRUCTION OF POLYHEDRAL OBJECTS FROM FEW PROJECTIONS
    9.
    发明申请
    ITERATIVE RECONSTRUCTION OF POLYHEDRAL OBJECTS FROM FEW PROJECTIONS 审中-公开
    用多项投影迭代重建多面体物体

    公开(公告)号：WO2009083864A3

    公开(公告)日：2009-10-29

    申请号：PCT/IB2008055348

    申请日：2008-12-16

    Applicant: PHILIPS INTELLECTUAL PROPERTY ,  KONINKL PHILIPS ELECTRONICS NV ,  ERHARD KLAUS ,  SCHAEFER DIRK ,  GRASS MICHAEL

    Inventor： ERHARD KLAUS ,  SCHAEFER DIRK ,  GRASS MICHAEL

    IPC: G06T11/00 ,  G06T17/20

    CPC classification number: G06T11/006 ,  G06T17/20

    Abstract: A method for fully automatic modelling of medical structures with homogeneous attenuation function from few projections is provided. The object of interest is modelled as a polyhedron with triangular surface mesh. The optimization of both the coordinates of the polyhedral model and the attenuation value of the polyhedral model is performed during a data reconstruction. This results in an attenuation value together with a three-dimensional surface model of the physical structure imaged. Combining several polyhedral models into one compound model, the method may allow for fully automatic modelling of medical structures with piecewise constant attenuation function.

    Abstract translation: 提供了一种从少量投影的全自动建模具有均匀衰减功能的医学结构的方法。 感兴趣的对象被建模为具有三角形表面网格的多面体。 在数据重建期间执行多面体模型的坐标和多面体模型的衰减值的优化。 这导致衰减值与成像的物理结构的三维表面模型一起。 将多个多面体模型组合成一个复合模型，该方法可以允许使用分段恒定衰减功能的医学结构的全自动建模。

    PROJECTION-BASED REMOVAL OF HIGH-CONTRAST OBJECTS
    10.
    发明申请
    PROJECTION-BASED REMOVAL OF HIGH-CONTRAST OBJECTS 审中-公开
    基于投影的高对比度物体的去除

    公开(公告)号：WO2009024894A2

    公开(公告)日：2009-02-26

    申请号：PCT/IB2008053229

    申请日：2008-08-12

    Applicant: PHILIPS INTELLECTUAL PROPERTY ,  KONINKL PHILIPS ELECTRONICS NV ,  JANDT UWE ,  SCHAEFER DIRK ,  GRASS MICHAEL

    Inventor： JANDT UWE ,  SCHAEFER DIRK ,  GRASS MICHAEL

    IPC: G06T5/10

    CPC classification number: G06T5/50 ,  G06T7/12 ,  G06T7/155 ,  G06T2207/10081 ,  G06T2207/10121 ,  G06T2207/30021

    Abstract: A system (900) and method for automatic projection-based removing of high-contrast artificial objects from a medical image is provided. The method comprises performing a low-pass filtering (1100) to the two-dimensional image (100, 500, 1000) using a filter width range (1110) corresponding to structures of a line-shaped artificial object to generate a low-pass filtered intensity image and performing an evaluation of the Hessian matrix of each pixels of the low-pass filtered intensity image for locating and enhancing the structure of the line-shaped artificial object to generate a multi-scale filtered intensity image, wherein predefined scaling widths are used in order to avoid the locating and enhancing of larger structures.

    Abstract translation: 提供了一种用于从医学图像自动投影去除高对比度人造物体的系统（900）和方法。 该方法包括使用对应于线状人造物体的结构的滤波器宽度范围（1110）对二维图像（100,500,1000）进行低通滤波（1100），以生成低通滤波 强度图像，并对低通滤波强度图像的每个像素的Hessian矩阵进行评估，以定位和增强线状人造物体的结构，以生成多尺度滤波强度图像，其中使用预定义的缩放宽度 以避免更大的结构的定位和增强。

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