| 衍射增强成像折射衬度的应用 |
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| 引用本文： | 胡春红,李辉,赵新颜,罗述谦. 衍射增强成像折射衬度的应用[J]. 光电子．激光, 2009, 20(4): 559-562 |
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| 作者姓名： | 胡春红 李辉 赵新颜 罗述谦 |
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| 作者单位： | 天津医科大学生物医学丁程系,天津,300070;首都医科大学生物医学工程学院,北京,100069;中国科学院自动化所模式识别国家重点实验室,北京,100080;首都医科大学生物医学工程学院,北京,100069;首都医科大学附属北京友谊医院肝病研究中心,北京,100050 |
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| 基金项目： | 国家自然科学基金重点项目，国家自然科学基金，中国科学院自动化研究所模式识别国家重点实验室资助项目 |
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| 摘 要： | 折射衬度是衍射增强成像(diffraction enhanced imaging,DEI)中的一种重要衬度,在弱吸收物质的成像中,折射衬度远超过吸收衬度.折射衬度应用的关键是提取出样品的折射信息,折射信息由相应的折射图像表示.根据生物样品和材料样品的特点,研究和比较了两种折射信息提取方法.利用样品的折射图像,对聚苯乙烯样品进行了简单的定量分析,比较了正常肝组织和肝血管瘤组织.实验结果表明,折射衬度清楚地描述了肝组织的微细结构和血管瘤损伤,精确地显示了无法在传统X射线成像技术中获得的聚苯乙烯样品的清晰结构.
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| 关 键 词： | 折射衬度 衍射增强成像(DEI) 相位衬度 弱吸收物质 |
The applications of refraction contrast based on diffraction enhanced imaging |
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| HU Chun-hong,LI Hui,ZHAO Xin-yan,LUO Shu-qian. The applications of refraction contrast based on diffraction enhanced imaging[J]. Journal of Optoelectronics·laser, 2009, 20(4): 559-562 |
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| Authors: | HU Chun-hong LI Hui ZHAO Xin-yan LUO Shu-qian |
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| Affiliation: | 1.Department of Biomedical Engineering;Tianjin Medical University;Tianjin 300070;China;2.College of Biomedical Engineering;Capital Medical University;Beijing 100069;3.National Laboratory of Pattern Recognition;Institute of Automation;Chinese Academy of Sciences;Beijing 100080;4.Liver Research Center;Beijing Friendship Hospital;Beijing 100050;China |
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| Abstract: | As an important contrast in diffraction enhanced imaging(DEI),the refraction contrast vastly exceeds the absorption contrast for weakly absorbing objects imaging.In order to effectively utilize the refraction contrast,the key procedure is first to obtain the refraction information expressed as the refraction image.In this paper,two refraction information extraction methods are investigated and compared according to the characteristics of the biological and material samples.The quantitative analysis of polys... |
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| Keywords: | refraction contrast diffraction enhanced imaging(DEI) phase-contrast weakly absorbing objects |
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