无吸收光栅的X射线相位衬度成像实验研究  

Experimental study of X-ray phase contrast imaging without absorbing grating

作　　者：杨强[1] 刘鑫[1] 郭金川[1] 雷耀虎[1] 黄建衡[1] 牛憨笨[1] 

机构地区：[1]深圳大学光电工程学院光电子器件与系统教育部重点实验室,深圳518060

出　　处：《物理学报》2012年第16期130-134,共5页Acta Physica Sinica

基　　金：国家重点基础研究发展计划(批准号:2012CB825802);国家自然科学基金重点项目(批准号:60532090);国家自然科学基金青年科学基金(批准号:61101175);深圳市科技局项目(批准号:JC201005280502A)资助的课题~~

摘　　要：通过对基于空间相干源和具有分析光栅功能的X射线转换屏的微分干涉X射线相位衬度成像系统的理论分析,利用线发射体阵列结构阳极X射线管和光助电化学刻蚀技术研制的相位光栅和具有分析光栅功能的X射线转换屏,组建了一种无吸收光栅的X射线微分干涉相衬成像系统.在此系统上开展了生物样品的实验研究,获得了较传统吸收成像更为清晰和更多样品结构信息的相位衬度图像.从而试验验证了该系统方案设计的可行性,为X射线相衬成像技术从实验室走向临床应用提供了有效途径.According to the theoretical analysis of X-ray differential phase-contrast imaging system based on one-dimensional spatial- coherence X-ray source with multi-line structured anode, a scintillator functioning as an absorption grating, and a phase grating fab- ricated by photo-assisted electrochemical etching technique developed by us, we construct a non-absorption grating X-ray differential phase-contrast imaging system, conduct the experiments on some biological samples prepared with the above system, and finally obtain some phase-contrast images with more structural information than the ones obtained by conventional X-ray absorption method. Consequently, out system can be considered as a feasible imaging system and can have potential applications in hospitals and laboratories.

关 键 词：X射线相衬成像 阵列结构阳极 相位光栅 具有分析光栅功能的转换屏 

分 类 号：O434.1[机械工程—光学工程]