同轴X射线位相衬度成像实验研究  

Experimental researches of in-line X-ray phase contrast imaging

作　　者：蒋诗平[1] 陈阳[1] 李妹芳[1] 陈亮[1] 熊壮[2] 余永强[2] 

机构地区：[1]中国科学技术大学国家同步辐射实验室,安徽合肥230029 [2]安徽医科大学附属医院放射科,安徽合肥230022

出　　处：《中国医学影像技术》2007年第11期1721-1723,共3页Chinese Journal of Medical Imaging Technology

基　　金：国家自然科学基金资助(60477001)

摘　　要：目的研究利用类点光源的同轴X射线位相衬度成像技术。方法在北京同步光源4W1A光束线上,分别利用白光束X射线和14keV单色X射线,采用同轴方式开展生物样品的位相衬度成像实验。结果位相衬度图像比吸收衬度的图像分辨率更高、衬度更好。结论对于X射线吸收很弱的样品,位相衬度成像能够得到更好衬度和更高分辨率的图像。利用类点源X射线同轴相位衬度成像技术相对比较容易地被用于临床。Objective To develop in-line X-ray phase contrast imaging technique using point-like source.Methods In-line phase contrast imaging experiments of biological samples were made on the beamline 4W1A at BSRF.The experiments employed white beam X-rays and 14 keV monochromatic X-ray,respectively.Results Images of phase contrast have better contrast and higher resolution than ones of absorption contrast do.Conclusion The X-ray images of the objects of weak absorption have better contrast and higher resolution using phase contrast imaging technique.In-line phase contrast imaging technique using point-like X-rays sources is comparatively easily applied to clinic.

关 键 词：X射线成像 位相衬度 同步辐射 

分 类 号：R814[医药卫生—影像医学与核医学]