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    • 5. 发明申请
    • REDUCTION OF HEART MOTION ARTIFACTS IN THORACIC CT IMAGING
    • 减少心脏CT成像中心脏运动的影响
    • WO2008026141A2
    • 2008-03-06
    • PCT/IB2007/053403
    • 2007-08-27
    • KONINKLIJKE PHILIPS ELECTRONICS N.V.PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBHBARSCHDORF, HansVON BERG, JensKUHN, Michael, H.LORENZ, CristianBLAFFERT, Thomas
    • BARSCHDORF, HansVON BERG, JensKUHN, Michael, H.LORENZ, CristianBLAFFERT, Thomas
    • G06T7/20A61B5/00
    • G06T7/251G06T7/149G06T7/33G06T2200/04G06T2207/10081G06T2207/30048G06T2207/30061G06T2211/412
    • The invention relates to a system (100) for adapting a plurality of model meshes to a plurality of image data, the system comprising a registration unit (110) for registering the plurality of model meshes with the plurality of image data on the basis of a computation of a registration transformation for transforming the plurality of model meshes, and an adaptation unit (120) for adapting the plurality of registered model meshes to the plurality of image data on the basis of a computation of locations of mesh vertices of the plurality of model meshes. The system (100) may further comprise a computing unit (130) for computing sparse vector fields comprising vectors of displacements of vertices of the adapted model meshes, an approximation unit (140) for computing dense vector fields on the basis of the sparse vector fields, a merge unit (150) for merging image data sets by means of the computed dense vector fields, and a reconstruction unit (155) for reconstructing a motion-compensated image data from the computed dense vector fields. The described system (100) is capable of reducing motion artifacts in tomographic images computed from data acquired at a plurality of different cardiac cycle phases.
    • 本发明涉及一种用于将多个模型网格适配到多个图像数据的系统(100),该系统包括登记单元(110),用于基于多个图像数据向多个图像数据登记多个模型网格 用于变换多个模型网格的注册变换的计算;以及适应单元,用于根据多个模型的网格顶点的位置的计算来将多个注册模型网格适配到多个图像数据 网格。 系统(100)还可以包括计算单元(130),用于计算包括适应模型网格的顶点位移矢量的稀疏矢量场,用于基于稀疏矢量场计算密集矢量场的近似单元(140) ,用于通过所计算的密集矢量场合并图像数据组的合并单元(150),以及用于从所计算的密集矢量场重构运动补偿图像数据的重建单元(155)。 所描述的系统(100)能够减少从在多个不同的心动周期阶段获取的数据计算的断层图像中的运动伪影。