An improved phase retrieval algorithm for X-ray in-line phase-contrast imaging
Phase contrast imaging technique has been improved promptly in recent years.Among these techniques in-line phase contrast imaging is widely used.Various algorithms for in-line phase retrieval have been proposed so far such as TIE (transport of intensity equation),CTF (contrast transfer function),first Born-approximations,GSF (Gerchberg-Saxton-Fienup) and etc.Bronnikov’s algorithm (BA) is a type of linear algorithm that is simple and efficient.But it can only be used for no absorption situations.In this paper an improved algorithm based on BA is presented.The approach adds a Δ(γ)(x,y) to the phase map (γ)b(x,y) retrieved by BA to make the reconstructed phase map more precise.Further,the approach is evaluated on simulated images and confirmed to be accurate at higher absorption rates.
in-line phase contrast imaging phase retrieval improved algorithm
Yunfeng Guo Tiange Zhuang Jianqi Sun
School of Biomedical Engineering and Med-X Research Institute, Shanghai Jiao Tong University, Shanghai, Peoples Republic of China,
国际会议
World Congress on Medical Physics and Biomedical Engineering (2012年医学物理及生物医学工程国际会议(IFMBE))
北京
英文
1034-1037
2012-05-26(万方平台首次上网日期,不代表论文的发表时间)