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    23.
    发明专利
    未知

    公开(公告)号：DE602004016560D1

    公开(公告)日：2008-10-23

    申请号：DE602004016560

    申请日：2004-12-06

    Applicant: PHILIPS INTELLECTUAL PROPERTY ,  KONINKL PHILIPS ELECTRONICS NV

    Inventor： VAN STEVENDAAL UDO ,  KOEHLER THOMAS

    IPC: G01T1/164 ,  G06T11/00

    Abstract: A method for processing polychromatic attenuation values, wherein the polychromatic attenuation values are acquired by means of a polychromatic source of radiation generating a cone beam and radiation detector array with a plurality of detector rows, wherein the plurality of detector rows are arranged adjacent to each other in a first direction perpendicular to a second direction, wherein the second direction is parallel to the plurality of detector rows, the method comprising the step of: assigning the monochromatic attenuation values to polychromatic attenuation values, wherein the polychromatic attenuation values depend on the first direction and a three-dimensional look-up table is used for assigning the monochromatic attenuation values to the polychromatic attenuation values.

    DUAL -ENERGY TOMOGRAPHIC IMAGING SYSTEM
    27.
    发明申请
    DUAL -ENERGY TOMOGRAPHIC IMAGING SYSTEM 审中-公开
    双重图像成像系统

    公开(公告)号：WO2012095713A9

    公开(公告)日：2013-05-23

    申请号：PCT/IB2011056004

    申请日：2011-12-29

    Applicant: KONINKL PHILIPS ELECTRONICS NV ,  PHILIPS INTELLECTUAL PROPERTY ,  ROESSL EWALD ,  KOEHLER THOMAS ,  THRAN AXEL

    Inventor： ROESSL EWALD ,  KOEHLER THOMAS ,  THRAN AXEL

    IPC: G06T11/00

    CPC classification number: G06T11/003 ,  G06T11/006 ,  G06T2211/408 ,  G06T2211/424

    Abstract: The invention relates to an imaging system (30) for imaging an object. A projection data providing unit (31) provides acquired spectral projection data of an object comprising at least two components, and a reconstruction unit (10) iteratively reconstructs at least two final component images of the object by performing several iteration steps, in which at least two intermediate component images are updated based on the acquired spectral projection data and a penalty term, which is indicative of the correlated noise between the at least two intermediate component images. Since the at least two intermediate component images are updated based on the acquired spectral projection data and a penalty term, which is indicative of the correlated noise, correlated noise is penalized during the iterative reconstruction. The finally resulting component images of the object are therefore less corrupted by correlated noise and have an improved image quality.

    Abstract translation: 本发明涉及一种用于对物体成像的成像系统（30）。 投影数据提供单元（31）提供包括至少两个分量的对象的获取的光谱投影数据，并且重建单元（10）通过执行几个迭代步骤来迭代地重构对象的至少两个最终分量图像，其中至少 基于所获取的光谱投影数据和惩罚项来更新两个中间分量图像，所述惩罚项指示所述至少两个中间分量图像之间的相关噪声。 由于基于所获取的频谱投影数据和指示相关噪声的罚分项来更新至少两个中间分量图像，所以在迭代重建期间相关噪声被惩罚。 因此，最终产生的对象的分量图像被相关噪声较少损坏并且具有改善的图像质量。

    UNCERTAINTY MAPS FOR SEGMENTATION IN THE PRESENCE OF METAL ARTIFACTS
    28.
    发明申请
    UNCERTAINTY MAPS FOR SEGMENTATION IN THE PRESENCE OF METAL ARTIFACTS 审中-公开
    不确定性在金属制品存在下分配

    公开(公告)号：WO2009027889A3

    公开(公告)日：2010-03-25

    申请号：PCT/IB2008053236

    申请日：2008-08-12

    Applicant: KONINKL PHILIPS ELECTRONICS NV ,  PHILIPS INTELLECTUAL PROPERTY ,  KOEHLER THOMAS ,  SCHMITT HOLGER ,  SCHULZ HEINRICH

    Inventor： KOEHLER THOMAS ,  SCHMITT HOLGER ,  SCHULZ HEINRICH

    IPC: G06T5/00

    CPC classification number: A61B6/5258 ,  G06T7/11 ,  G06T7/149 ,  G06T2207/10081 ,  G06T2207/20012 ,  G06T2207/30052

    Abstract: When performing model-based segmentation on a 3D patient image (80), metal artifacts in the patient image (80), caused by metal in the patient's body, are detected, and a metal artifact reduction technique is performed to reduce the artifact(s) by interpolation projection data in the region of the artifact(s). The interpolated data is used to generate an uncertainty map for artifact- affected voxels in the image, and a mesh model (78) is conformed to the image to facilitate segmentation thereof. Internal and external energies applied to push and pull the model (78) are weighted as a function of the uncertainty associated with one or more voxels in the image (80). Iteratively, mathematical representations of the energies and respective weights are solved to describe an updated model shape that more closely aligns to the image (80).

    Abstract translation: 当在3D患者图像（80）上执行基于模型的分割时，检测由患者身体中的金属引起的患者图像（80）中的金属伪像，并且执行金属伪像减少技术以减少伪像 ）通过伪像区域内的插值投影数据。 内插数据用于为图像中的假象影响的体素生成不确定性图，并且网格模型（78）符合图像以便于其分割。 作为与图像（80）中的一个或多个体素相关联的不确定度的函数，加权用于推动和拉动模型（78）的内部和外部能量。 迭代地，解决能量和相应权重的数学表示以描述与图像更接近地对准的更新的模型形状（80）。

    METHOD FOR CALIBRATING A DEVICE FOR IMAGING THE INTERIOR OF TURBID MEDIA AND METHOD FOR CORRECTING MEASURED INTENSITIES IN SUCH A DEVICE
    29.
    发明申请
    METHOD FOR CALIBRATING A DEVICE FOR IMAGING THE INTERIOR OF TURBID MEDIA AND METHOD FOR CORRECTING MEASURED INTENSITIES IN SUCH A DEVICE 审中-公开
    用于校准用于成像涡轮介质的内部的装置的方法和用于校正这种装置中的测量强度的方法

    公开(公告)号：WO2009060383A3

    公开(公告)日：2009-07-30

    申请号：PCT/IB2008054583

    申请日：2008-11-04

    Applicant: KONINKL PHILIPS ELECTRONICS NV ,  PHILIPS INTELLECTUAL PROPERTY ,  KOEHLER THOMAS ,  NIELSEN TIM ,  BAKKER LEVINUS P

    Inventor： KOEHLER THOMAS ,  NIELSEN TIM ,  BAKKER LEVINUS P

    IPC: G01N21/47 ,  A61B5/00 ,  A61B6/00

    CPC classification number: G01N21/4795 ,  A61B5/0091 ,  A61B5/4312 ,  A61B2560/0233

    Abstract: A method for calibrating a device for imaging the interior of turbid media is provided. The device for imaging the interior of turbid media uses a fluorescent contrast agent emitting fluorescence light and comprises a receptacle (2) for receiving a turbid medium (1 ) during examination; at least one light source optically connected to the receptacle (2) for irradiating the interior of the receptacle with light of a predetermined wavelength (?L); at least one detector optically connected to the receptacle (2) for detecting light emanating from the interior of the receptacle; and at least one filter introducible in the detection light path from the receptacle (2) to the at least one detector. The method for calibrating comprises the steps: - performing a first reference measurement with the receptacle (2) filled with an optically matching medium (4); - performing a second reference measurement with the receptacle (2) filled with a mixture of the optically matching medium and a fluorescent contrast agent; - calibrating the device based on the results of the first reference measurement and the second reference measurement.

    Abstract translation: 提供了一种用于校准用于对浑浊介质内部进行成像的装置的方法。 用于对混浊介质内部进行成像的装置使用发射荧光的荧光对比剂，并且包括用于在检查期间接收混浊介质（1）的容器（2） 至少一个光源，其光学连接到所述插座（2），用于用预定波长（λL）的光照射所述插座的内部; 至少一个检测器，其光学连接到所述容器（2），用于检测从所述容器的内部发出的光; 以及至少一个滤光器，其引导到从所述插座（2）到所述至少一个检测器的检测光路中。 用于校准的方法包括以下步骤： - 用填充有光学匹配介质（4）的容器（2）执行第一参考测量; - 用所述光学匹配介质和荧光对比剂的混合物填充的所述容器（2）执行第二参考测量; - 根据第一个参考测量结果和第二个参考测量结果校准设备。

    EXACT FBP TYPE ALGORITHM FOR ARBITRARY TRAJECTORIES
    30.
    发明申请
    EXACT FBP TYPE ALGORITHM FOR ARBITRARY TRAJECTORIES 审中-公开
    用于仲裁TRAJECTORIES的精确FBP类型算法

    公开(公告)号：WO2007004196A3

    公开(公告)日：2007-05-03

    申请号：PCT/IB2006052248

    申请日：2006-07-04

    Applicant: PHILIPS INTELLECTUAL PROPERTY ,  KONINKL PHILIPS ELECTRONICS NV ,  KOEHLER THOMAS ,  BONTUS CLAAS ,  PROKSA ROLAND

    Inventor： KOEHLER THOMAS ,  BONTUS CLAAS ,  PROKSA ROLAND

    IPC: A61B6/03 ,  G01N23/04 ,  G06T11/00

    CPC classification number: A61B6/032 ,  A61B6/027 ,  A61B6/4085 ,  G06T11/006 ,  G06T2211/416 ,  G06T2211/421

    Abstract: Exact methods of FBP reconstruction may have the restriction that the object point to be reconstructed and the first and last source position used for back- projection must lie on a line. According to an exemplary embodiment of the present invention, a method of FBP reconstruction is provided, comprising a filtering of the projection data along a projected M-line and a back-projecting of the filtered projection data over an interval larger than the PI interval of the object point. This may provide for an exact FBP type algorithm for arbitrary trajectories.

    Abstract translation: FBP重建的精确方法可能具有要重构的对象点的限制，并且用于反投影的第一和最后一个源位置必须位于一行上。 根据本发明的示例性实施例，提供了一种FBP重构的方法，包括沿着投影M线对投影数据进行滤波，并且在大于PI间隔的间隔上对经过滤的投影数据进行反投影 对象点。 这可以为任意轨迹提供精确的FBP类型算法。

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