[en] The X-ray fluorescence microtomography method is presented, which is capable of virtually slicing samples to obtain cross-sections of their inner structure. High precision experimental results of fluo-tomography in 'pencil-beam' geometry with up to 1.2 μm resolution are described. Image reconstructions are based on either a simplified algebraic reconstruction method (ART) or the filtered back-projection method (FBP). Phantoms of inhomogeneous test objects as well as biological samples are successfully analyzed

[en] We combined grating-based phase contrast imaging with projection magnification using a high-brilliance microfocus x-ray source. This geometry offers increased detection efficiency even at higher energies for quantitative high-resolution phase contrast imaging. By systematic methodical investigations, it is shown, how the primary measurement signal is affected by the magnification factor. Furthermore, the influences of different physical parameters, as the size or the energy spectrum of the x-ray source, on the measurement results are discussed using numerical simulations. Based on these investigations, the phase shift can be determined quantitatively with high precision. Finally, experimental results demonstrate feasible applications like quality inspection of refractive x-ray lenses and high-resolution phase contrast tomography. (authors)

[en] First experimental results of fluorescence microtomography in 'pencil-beam' geometry with 6 μm resolution obtained at the ESRF/1D 22 are described. Image reconstructions are based on either a simplified algebraic reconstruction method (ART) or the filtered back-projection method (FBT). Simple cylindrical test objects are accurately reconstructed