发明名称 |
Method and device for automatically differentiating bones or other calcium-containing materials and contrast agent in soft tissue |
摘要 |
In at least one embodiment, two image data records of two computed tomography pictures of the object are provided that have been recorded in the context of a different spectral distribution of the X-radiation. For voxels of at least one interesting slice, there is calculated from the two image data records a ratio r that is yielded from measured or averaged X-ray attenuation values of the respective voxel or its environment in the context of the different spectral distributions of the X-radiation and prescribed X-ray attenuation values of soft tissue in the context of the different spectral distributions of the X-radiation according to a prescribed calculation rule. Upon overshooting of a threshold value for the ratio r the respective voxel is assigned either contrast agent or calcium-containing material as a function of the magnitude of r.
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申请公布号 |
US7920735(B2) |
申请公布日期 |
2011.04.05 |
申请号 |
US20070730271 |
申请日期 |
2007.03.30 |
申请人 |
SIEMENS AKTIENGESELLSCHAFT |
发明人 |
KRAUSS BERNHARD;GRASRUCK MICHAEL |
分类号 |
G06K9/00 |
主分类号 |
G06K9/00 |
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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