| 衍射增强成像原理 |
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| 引用本文： | 朱佩平,袁清习,黄万霞,王寯越,舒航,吴自玉,冼鼎昌. 衍射增强成像原理[J]. 物理学报, 2006, 55(3): 1089-1098 |
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| 作者姓名： | 朱佩平 袁清习 黄万霞 王寯越 舒航 吴自玉 冼鼎昌 |
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| 作者单位： | (1)中国科学院高能物理研究所同步辐射室,北京 100049; (2)中国科学院高能物理研究所同步辐射室,北京 100049;国家纳米科学中心协作实验室,北京 100049 |
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| 基金项目： | 教育部科学技术研究项目;中国科学院高能物理研究所创新项目 |
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| 摘 要： | 研究了衍射增强成像过程中X射线与样品和晶体的相互作用,重点分析了小角散射对衍射增强成像的影响,为衍射增强成像方程补充了小角散射噪声项,建立了更普遍的衍射增强成像方程.根据新的衍射增强成像方程,推导出峰位像和腰位像的吸收衬度,消光衬度和折射衬度的数学表达,并讨论了两种合成像(表观吸收像和折射像)的衬度问题.关键词：相位衬度成像同步辐射晶体衍射X射线照相术
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| 关 键 词： | 相位衬度成像 同步辐射 晶体衍射 X射线照相术 |
| 收稿时间： | 2005-03-29 |
| 修稿时间： | 2005-06-01 |
Principles of X-ray diffraction enhanced imaging |
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| Zhu Pei-Ping,Yuan Qing-Xi,Huang Wan-Xia,Wang Jun-Yue,Shu Hang,Wu Zi-Yu,Xian Ding-Chang. Principles of X-ray diffraction enhanced imaging[J]. Acta Physica Sinica, 2006, 55(3): 1089-1098 |
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| Authors: | Zhu Pei-Ping Yuan Qing-Xi Huang Wan-Xia Wang Jun-Yue Shu Hang Wu Zi-Yu Xian Ding-Chang |
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| Affiliation: | 1. Belling Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China ; 2.National Center for Nano Scienee and Technology, Beijing 100049, China |
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| Abstract: | The interactions between X-ray and the sample and crystals were investigated, and the influence of small angle scattering on images was emphatically analyzed in diffraction enhanced imaging in this paper. Not only were the additional noise term caused by small angle scattering introduced, and more general DEI equation established, but also expressions of absorption contrast, extinction contrast and refraction contrast were given for the peak image and the middle slope image. With the new DEI equation, the contrasts of two kinds of resultant images (apparent absorption image and refraction image) were discussed. |
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| Keywords: | phase contrast imaging synchrotron radiation crystal diffraction radiography |
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