发明名称 |
Image correction method for an X-ray detector |
摘要 |
The invention relates to an image correction method for an X-ray detector which includes a rear-mounted light source with improved correction of the after-image effects. The invention is based on the recognition of the fact that the so-called gain effects cannot be eliminated by means of known methods. The gain effects, however, give rise to an increase of the amplification by a few percents, and hence to a bright image with artefacts, already in the case of customary diagnostic X-ray doses. In accordance with the invention the gain effects are measured by acquisition of light source images by means of the build-in light source; the strength of the gain effect as well as a correction factor are determined pixel by pixel on the basis thereof. The pixel values of the bright image are corrected by means of the correction factor.
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申请公布号 |
US2002024017(A1) |
申请公布日期 |
2002.02.28 |
申请号 |
US20010925398 |
申请日期 |
2001.08.09 |
申请人 |
OVERDICK MICHAEL;RUETTEN WALTER |
发明人 |
OVERDICK MICHAEL;RUETTEN WALTER |
分类号 |
G01T1/20;A61B6/00;G01T1/00;G01T1/17;G01T1/24;G01T1/40;G06T1/00;H01L27/00;H04N3/15;H04N5/32;H04N7/18;H05G1/64;(IPC1-7):H01L27/00 |
主分类号 |
G01T1/20 |
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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