| 转换屏背底散射对图像对比度的影响研究 |
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| 引用本文： | 江孝国,谭肇,王婉丽,李泽仁,祁双喜,王伟.转换屏背底散射对图像对比度的影响研究[J].强激光与粒子束,2003,15(1):29-32. |
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| 作者姓名： | 江孝国 谭肇 王婉丽 李泽仁 祁双喜 王伟 |
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| 作者单位： | 中国工程物理研究院 流体物理研究所, 四川 绵阳 621900 |
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| 基金项目： | 国防科技基础研究基金资助课题 |
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| 摘 要： | 分析了高能X光照相中转换屏的背底散射（对可见光的散射）对图像对比度的影响，建立了相应散射影响的计算模型；同时还通过计算模拟给出了相应的结果，理论和实验研究表明对转换屏背底的处理是极为重要的。
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| 关 键 词： | X光辐射照相 转换屏 散射 图像对比度 |
| 文章编号： | 1001-4322(2003)01-0029-04 |
| 收稿时间： | 2002/3/18 |
| 修稿时间： | 2002年3月18日 |
Study on image contrast affected by scattering from the back side of a convertor |
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| jiang xiao-guo,tan zhao,wang wan-li,li ze-ren,qi shuang-xi,wang wei.Study on image contrast affected by scattering from the back side of a convertor[J].High Power Laser and Particle Beams,2003,15(1):29-32. |
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| Authors: | jiang xiao-guo tan zhao wang wan-li li ze-ren qi shuang-xi wang wei |
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| Institution: | Institute of Fluid Physics, CAEP, P.O.Box 919-109, Mianyang 621900, China |
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| Abstract: | In high energy X ray radiography system , CsI convertor is usually used to convert the X ray image into a visible image which can be recorded by other high sensitive image system . The scattering light from the inner side of the convertor can reduce the image contrast and the spacial resolution will degrade. In the paper ,one evaluation method about the influence on the image contrast is set up and some calculated results are given to show this . The tests have proved that the process on the back side of the convertor is the most important thing and that the scattering coefficient of the back side must be reduced to a very small level to keep the image contrast. |
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| Keywords: | X-ray radiography CsI convertor Scatterance Image contrast |
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