Abstract
The attenuation of x-rays in a material forms the basis of x-ray radiography and tomography. By measuring the transmission of the x-rays over a large amount of raypaths, the three-dimensional (3D) distribution of the x-ray linear attenuation coefficient can be reconstructed in a 3D volume. In x-ray microtomography (), however, the x-ray refraction yields a significant signal in the transmission image and the 3D distribution of the refractive index can be reconstructed in a 3D volume. To do so, several methods exist, on both a hardware and software level. In this paper, we compare two similar software methods, the modified Bronnikov algorithm and the simultaneous phase-and-amplitude retrieval. The first method assumes a pure phase object, whereas the latter assumes a homogeneous object. Although these assumptions seem very restrictive, both methods have proven to yield good results on experimental data.
© 2012 Optical Society of America
Full Article | PDF ArticleMore Like This
R. C. Chen, L. Rigon, and R. Longo
Opt. Express 21(6) 7384-7399 (2013)
Xizeng Wu and Aimin Yan
Opt. Express 17(13) 11187-11196 (2009)
Ilian Häggmark, William Vågberg, Hans M. Hertz, and Anna Burvall
Opt. Express 25(26) 33543-33558 (2017)