发明名称 |
Scatter and beam hardening correctoin in computed tomography applications |
摘要 |
A method of correcting scatter includes obtaining a voxellized representation of a 3D image of an object from a plurality of projection data. A single scatter profile for the object is calculated using the voxellized representation of the 3D image of the object. A total scatter profile for the object is determined using the single scatter profile and an adjustment factor and the projection data is corrected using the total scatter profile to obtain a scatter corrected projection data. A beam hardening correction method includes simulating a number of attenuation data for an x-ray spectrum, at least one object material, and a detector spectral response. A function is fitted to the attenuation data to obtain an attenuation curve. A number of projection data for an object are corrected using the attenuation curve to obtain a number of beam hardening corrected projection data. A corrected image of the object is reconstructed from the beam hardening corrected image data.
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申请公布号 |
US2005185753(A1) |
申请公布日期 |
2005.08.25 |
申请号 |
US20040784099 |
申请日期 |
2004.02.23 |
申请人 |
GENERAL ELECTRIC COMPANY |
发明人 |
DU YANFENG;HOPKINS FORREST F. |
分类号 |
G01N23/04;G06T11/00;(IPC1-7):G21K1/12 |
主分类号 |
G01N23/04 |
代理机构 |
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