| X射线荧光层析成像中消除散射光的方法 |
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| 引用本文： | 谢红兰,高鸿奕,陈建文,陆培祥,徐至展. X射线荧光层析成像中消除散射光的方法[J]. 光学学报, 2003, 23(4): 85-389 |
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| 作者姓名： | 谢红兰 高鸿奕 陈建文 陆培祥 徐至展 |
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| 作者单位： | 中国科学院上海光学精密机械研究所,上海,201800;中国科学院上海光学精密机械研究所,上海,201800;中国科学院上海光学精密机械研究所,上海,201800;中国科学院上海光学精密机械研究所,上海,201800;中国科学院上海光学精密机械研究所,上海,201800 |
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| 基金项目： | 国家 973项目,国家自然科学基金 ( 6 0 2 780 30 )资助课题。 |
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| 摘 要： | 介绍了X射线荧光层析成像技术的成像原理及其在微量分析领域中的应用。针对X射线与物质相互作用时,不仅产生荧光,而且会产生各种散射光,为消除这些散射光对成像结果的影响,提出采用在与入射X射线垂直方向放置一个圆环状的晶体单色器,即双聚焦模式晶体单色器,使荧光与各种散射光分离,并聚焦在探测器上。这样不仅大大增强了荧光信号的强度,而且可使荧光探测器小型化。
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| 关 键 词： | X射线光学 X射线荧光层析 晶体单色器 同步辐射 |
| 收稿时间： | 2002-04-09 |
A Method of Eliminating Scattered Light in X-Ray Fluorescent Tomography |
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| Xie Honglan Gao Hongyi Chen Jianwen Lu Peixiang Xu Zhizhan. A Method of Eliminating Scattered Light in X-Ray Fluorescent Tomography[J]. Acta Optica Sinica, 2003, 23(4): 85-389 |
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| Authors: | Xie Honglan Gao Hongyi Chen Jianwen Lu Peixiang Xu Zhizhan |
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| Abstract: | The imaging principle of X-ray fluorescent tomography and its application in microanalysis field are introduced simply . Not only fluorescence but also various scattered light are produced while high energy X rays interact with substance. In order to eliminate the influence of these scattered light to imaging result, a method is proposed in which a doubly focusing crystal monochromator is placed normal to the accident X rays to separate X-ray fluorescence from the background and focuse it to a point on the detector surface. The method not only enhances the intensity of X-ray fluorescence but also permits the use of a smaller detector. |
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| Keywords: | X-ray optics X-ray fluorescent tomography crystal monochromator synchrotron radiation |
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