title: Multiple-beam X-ray interferometry for phase-contrast microtomography.
abstract: The first successful operation of an X-ray interferometer under conditions of non-planar three-beam diffraction for phase-contrast X-ray microtomography is reported. Intrinsic phase differences of the reflections used cancel from the three-dimensional phase image of the specimen. With simultaneous hkl and hkl reflections of a synchrotron radiation beam in a side-by-side geometry, the size of the usable field of view is doubled and the investigated specimen volume is increased by a factor of four. As an example, the reconstructed slice of a mouse kidney is shown in phase contrast at 71 keV. Optimized choices of three-beam reflections and matching interferometer geometries useful for applications are presented.
authors.affiliation: Institute of Physics, University of Dortmund, D-44221 Dortmund, Germany. bonse@physik.uni-dortmund.de
authors.forename: U
authors.initials: U
authors.lastname: Bonse
authors.forename: F
authors.initials: F
authors.lastname: Beckmann
mesh_terms: D000818:Animals; D007368:Interferometry; D007668:Kidney / Q000000981:diagnostic imaging; D051379:Mice; D017356:Synchrotrons; D014056:Tomography, X-Ray / Q000295:instrumentation / Q000379:methods*