title: Three-dimensional propagation in near-field tomographic X-ray phase retrieval.
abstract: This paper presents an extension of phase retrieval algorithms for near-field X-ray (propagation) imaging to three dimensions, enhancing the quality of the reconstruction by exploiting previously unused three-dimensional consistency constraints. The approach is based on a novel three-dimensional propagator and is derived for the case of optically weak objects. It can be easily implemented in current phase retrieval architectures, is computationally efficient and reduces the need for restrictive prior assumptions, resulting in superior reconstruction quality.
authors.affiliation: Institut für Röntgenphysik, Georg-August-Universität Göttingen, Friedrich-Hund-Platz 1, Göttingen, Germany.
authors.forename: Aike
authors.initials: A
authors.lastname: Ruhlandt
authors.affiliation: Institut für Röntgenphysik, Georg-August-Universität Göttingen, Friedrich-Hund-Platz 1, Göttingen, Germany.
authors.forename: Tim
authors.initials: T
authors.lastname: Salditt
keywords: X-ray imaging; phase retrieval; tomography