title: X-ray phase imaging with a grating interferometer.
abstract: Using a high-efficiency grating interferometer for hard X rays (10-30 keV) and a phase-stepping technique, separate radiographs of the phase and absorption profiles of bulk samples can be obtained from a single set of measurements. Tomographic reconstruction yields quantitative three-dimensional maps of the X-ray refractive index, with a spatial resolution down to a few microns. The method is mechanically robust, requires little spatial coherence and monochromaticity, and can be scaled up to large fields of view, with a detector of correspondingly moderate spatial resolution. These are important prerequisites for use with laboratory X-ray sources.
authors.forename: Timm
authors.initials: T
authors.lastname: Weitkamp
authors.forename: Ana
authors.initials: A
authors.lastname: Diaz
authors.forename: Christian
authors.initials: C
authors.lastname: David
authors.forename: Franz
authors.initials: F
authors.lastname: Pfeiffer
authors.forename: Marco
authors.initials: M
authors.lastname: Stampanoni
authors.forename: Peter
authors.initials: P
authors.lastname: Cloetens
authors.forename: Eric
authors.initials: E
authors.lastname: Ziegler