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    • 1. 发明申请
    • IMAGE RECONSTRUCTION DEVICE AND METHOD
    • 图像重建装置及方法
    • WO2006056942A1
    • 2006-06-01
    • PCT/IB2005/053861
    • 2005-11-22
    • PHILIPS INTELLECTUAL PROPERTY & STANDARDS GMBHKONINKLIJKE PHILIPS ELECTRONICS N. V.BERTRAM, MatthiasAACH, TilROSE, GeorgSCHAEFER, Dirk
    • BERTRAM, MatthiasAACH, TilROSE, GeorgSCHAEFER, Dirk
    • G06T11/00
    • G06T11/005
    • The present invention relates to an image reconstruction device and a corresponding method for reconstructing a 3D image of an object (7) from projection data of said object (7). In order to obtain 3D images having sharp high-contrast structures and almost no image blur, and in which streak artifacts (and noise in tissue-like regions) are strongly reduced, an image reconstruction device is proposed comprising: a first reconstruction unit (30) for reconstructing a first 3D image of said object (7) using the original projection data, an interpolation unit (31) for calculating interpolated projection data from said original projection data, - a second reconstruction unit (32) for reconstructing a second 3D image of said object (7) using at least the interpolated projection data, a segmentation unit (33) for segmentation of the first or second 3D image into high-contrast and low-contrast areas, a third reconstruction unit (34) for reconstructing a third 3D image from selected areas of said first and said second 3D image, wherein said segmented 3D image is used to select image values from said first 3D image for high-contrast areas and image values from said second 3D image for low-contrast areas.
    • 本发明涉及一种从所述物体(7)的投影数据重建物体(7)的3D图像的图像重建装置和相应的方法。 为了获得具有锐利的高对比度结构并且几乎没有图像模糊的3D图像,并且其中强烈减少了条纹伪影(和组织样区域中的噪声),提出了一种图像重建装置,包括:第一重建单元 ),用于使用原始投影数据重建所述对象(7)的第一3D图像;内插单元(31),用于从所述原始投影数据计算内插投影数据;第二重建单元(32),用于重建第二3D图像 所述物体(7)至少使用所述内插投影数据;分割单元(33),用于将所述第一或第二3D图像分割为高对比度和低对比度区域;第三重建单元(34),用于重建第三 所述第一和第二3D图像的所选区域的3D图像,其中所述分割3D图像用于从所述第一3D图像中选择用于高对比度区域的图像值,并且来自所述第二3D图像的图像值 低对比度区域的3D图像。