title: Comparison of two single-image phase-retrieval algorithms for in-line x-ray phase-contrast imaging.
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 (μCT), 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.
authors: Ghent University, Department of Physics and Astronomy Proeftuinstraat 86, Gent B-9000, Belgium. Matthieu.Boone@UGent.be
authors: Matthieu N
authors: MN
authors: Boone
authors: Wouter
authors: W
authors: Devulder
authors: Manuel
authors: M
authors: Dierick
authors: Loes
authors: L
authors: Brabant
authors: Elin
authors: E
authors: Pauwels
authors: Luc
authors: L
authors: Van Hoorebeke