物理学报2012，Vol.61Issue(1)：512-520,9.
相干X射线衍射成像三维重建的数字模拟研究
Digital simulation for 3D reconstruction of coherent x-ray diffractive imaging
摘要
Abstract
In coherent x-ray diffractive imaging,the oversampled far-field diffraction pattern for phase retrieval iterative algorithm is used in order to reconstruct the information about the real space.The support constraint is one of the most important steps of the 3D phase retrieval process.Here we use a small nonperiodic 2D digital image as an object for studying the algorithm of pursuing support constraint automatically and noise correction for different types of noises in the diffraction pattern.We find an efficient method of noise correction while the traditional methods do not work well in the high noise condition.The result shows that this method can be used to reduce the effect effectively for the reconstruction.We also study the 3D reconstruction for the electron density distribution of Au nano-particles.We achieve a good reconstruction separately with and without noise effect in the diffraction pattern and we find that the signal-to-noise ratio should be bigger than 27 for successful 3D reconstruction.关键词
X射线相干衍射成像/过采样/三维相位重建/显微成像Key words
coherent x-ray diffractive imaging/oversampling/3D phase retrieval/microscopy分类
数理科学引用本文复制引用
周光照,王玉丹,任玉琦,陈灿,叶琳琳,肖体乔..相干X射线衍射成像三维重建的数字模拟研究[J].物理学报,2012,61(1):512-520,9.基金项目
国家重点基础研究发展计划 （）
中国科学院对外合作重点项目 （）
国家自然科学基金（批准号：10805071 （）
10705020） （）
上海市基础研究重点项目（批准号：08JC1411900）资助的课题~~ （）
