Glancing angle Talbot-Lau grating interferometers for phase contrast imaging at high x-ray energy

D. Stutman*, M. Finkenthal

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

A Talbot-Lau interferometer is demonstrated using micro-periodic gratings inclined at a glancing angle along the light propagation direction. Due to the increase in the effective thickness of the absorption gratings, the device enables differential phase contrast imaging at high x-ray energy, with improved fringe visibility (contrast). For instance, at 28° glancing angle, we obtain up to ∼35 overall interferometer contrast with a spectrum having ∼43 keV mean energy, suitable for medical applications. In addition, glancing angle interferometers could provide high contrast at energies above 100 keV, enabling industrial and security applications of phase contrast imaging.

Original languageEnglish
Article number091108
JournalApplied Physics Letters
Volume101
Issue number9
DOIs
StatePublished - 27 Aug 2012
Externally publishedYes

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