发明名称 |
COMPENSATION OF COMPUTED TOMOGRAPHY DATA FOR X-RAY DETECTOR AFTERGLOW ARTIFACTS |
摘要 |
15CT03549 An x-ray CT system has a detector which revolves about the object being imaged to acquire attenuation data from many different angles through a range of at least 180.degree.. The response of the detector has a time lag which as the detector revolves tends to blur the attenuation data. The acquired data is compensated for the resolution degradation by convolving the data with a function that is the inverse of a response function of the detector. An image can be reconstructed from this compensated data. However, this compensation process tends to reintroduce noise that was reduced by the blurring. As a result, a modified version of the detector response function is applied to the compensated data to reduce the noise without degrading the image resolution to an unacceptable level.
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申请公布号 |
CA2048782(A1) |
申请公布日期 |
1992.05.20 |
申请号 |
CA19912048782 |
申请日期 |
1991.08.08 |
申请人 |
GENERAL ELECTRIC COMPANY |
发明人 |
KING, KEVIN F.;CRAWFORD, CARL R. |
分类号 |
A61B6/03;G06F17/10;G06T1/00;G06T11/00;(IPC1-7):G01N23/04;A61B6/00 |
主分类号 |
A61B6/03 |
代理机构 |
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主权项 |
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地址 |
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