X-ray phase imaging with a grating interferometer.
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.
Weitkamp
Timm
T
Diaz
Ana
A
David
Christian
C
Pfeiffer
Franz
F
Stampanoni
Marco
M
Cloetens
Peter
P
Ziegler
Eric
E