发明名称 |
Reduced partial volume artifacts in image reconstruction, with application to X-ray computed tomography |
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.
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申请公布号 |
US5412703(A) |
申请公布日期 |
1995.05.02 |
申请号 |
US19930013589 |
申请日期 |
1993.02.04 |
申请人 |
INSTITUTE FOR RADIOLOGICAL IMAGE SCIENCE, INC. |
发明人 |
GOODENOUGH, DAVIL J.;EDWARDS, WARREN S. |
分类号 |
G01N23/04;G06T11/00;(IPC1-7):G01N23/083 |
主分类号 |
G01N23/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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