| CT重构中射线硬化的校正研究 |
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| 引用本文： | 杨民,路宏年,路远.CT重构中射线硬化的校正研究[J].光学技术,2003,29(2):177-178. |
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| 作者姓名： | 杨民 路宏年 路远 |
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| 作者单位： | 北京航空航天大学,机械工程及自动化学院,北京,100083 |
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| 摘 要： | 在工业CT(ComputedTomography)重构中,由于射束硬化使得重建图像中出现"杯状"伪影。为了消除这种影响,提出了一种校正方法。该方法基于Beer理论,根据多色射束和数据,首先拟合出等效单色射束和数据,然后进行卷积反投影重构。这种方法不仅较好地消除了射线硬化的影响,同时也使重构图像的信息损失不大。
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| 关 键 词： | X射线检测 射束硬化 计算机断层扫描 |
| 文章编号： | 1002-1582(2003)02-0177-02 |
| 修稿时间： | 2002年5月21日 |
Method of beam hardening correction for CT reconstruction |
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| Abstract: | In order to eliminate the affects of beam hardening which causes the cup like artifacts in ICT(Industrial Computed Tomography) reconstruction, a method of beam hardening correction is introduced. This method is based on Beer's law. According to the polychromatic data, it results in equivalent monochromatic data through data fitting, then the filtering back projection is performed and the negative affects of beam hardening are decreased considerably,and at the same time, the useful information of the image is not lost. |
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| Keywords: | X-rays testing beam-hardening CT(Computed Tomography) |
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