公开(公告)号：US5412703A

公开(公告)日：1995-05-02

申请号：US13589

申请日：1993-02-04

申请人： Davil J. Goodenough ,  Warren S. Edwards

发明人： Davil J. Goodenough ,  Warren S. Edwards

IPC分类号： G01N23/04 ,  G06T11/00 ,  G01N23/083

CPC分类号： G06T11/005 ,  G01N23/046 ,  G01N2223/419 ,  G01N2223/612 ,  Y10S378/901

摘要： An apparatus for correcting an X-ray tomographic image is presented, where the tomographic image is created by measuring an X-ray transmission coefficient at each of a plurality of X-ray beam paths through an object to enable reconstructing a tomographic image of the object. There is a device for selecting a plurality of volume averaged voxels along at least one of the X-ray beam ray paths, and for placing contiguous volume averaged voxels in a run length of volume averaged voxels, to make a plurality of run lengths of volume averaged voxels. There is a device for dividing the plurality of run lengths of volume averaged voxels into a plurality of subslices. There is a device, responsive to the plurality of subslices and responsive to the plurality of run lengths of volume averaged voxels, for computing a corrected value of X-ray attenuation coefficient for the X-ray beam ray path. There is a device for reconstructing a correction image using the corrected X-ray attenuation coefficient for each X-ray beam ray path. Finally, there is a device for obtaining an improved image by combining the tomographic image with the correction image.

摘要翻译： 提出了一种用于校正X射线断层图像的装置，其中通过测量通过物体的多个X射线束路径中的每一个处的X射线透射系数来创建断层图像，以能够重构物体的断层图像 。 存在用于沿着X射线束射线路径中的至少一个选择多个体积平均体元并且用于将体积平均体素的游程长度中的连续体积平均体素设置为体积平均体素的游程长度的装置 平均体素。 存在用于将体积平均体素的多个游程长度分成多个子部分的装置。 存在响应于多个子部分并响应于体积平均体元的多个游程长度的装置，用于计算X射线束射线路径的X射线衰减系数的校正值。 存在用于使用针对每个X射线束射线路径的校正的X射线衰减系数来重建校正图像的装置。 最后，存在通过将断层图像与校正图像组合来获得改进图像的装置。