title: Two-shot X-ray dark-field imaging.
abstract: In this article, we report on a novel acquisition scheme for time- and dose-saving retrieval of dark-field data in grating-based phase-contrast imaging. In comparison to currently available techniques, the proposed approach only requires two phase steps. More importantly, our method is capable of accurately retrieving the dark-field signal where conventional approaches fail, for instance in the case of very low photon statistics. Finally, we successfully extend two-shot dark-field imaging to tomographic investigations, by implementing an iterative reconstruction with appropriate weights. Our results indicate an important progression towards the clinical feasibility of dark-field tomography.
authors.forename: M
authors.initials: M
authors.lastname: Marschner
authors.forename: L
authors.initials: L
authors.lastname: Birnbacher
authors.forename: K
authors.initials: K
authors.lastname: Mechlem
authors.forename: W
authors.initials: W
authors.lastname: Noichl
authors.forename: A
authors.initials: A
authors.lastname: Fehringer
authors.forename: M
authors.initials: M
authors.lastname: Willner
authors.forename: K
authors.initials: K
authors.lastname: Scherer
authors.forename: J
authors.initials: J
authors.lastname: Herzen
authors.forename: P B
authors.initials: PB
authors.lastname: Noël
authors.forename: F
authors.initials: F
authors.lastname: Pfeiffer