A novel setup for phase contrast imaging and a new method for imaging the intensity distribution of the focal spot of a microfocus x-ray tube are presented. By combination of a grating interferometer with projection magnification, high resolution phase contrast images were recorded under the application of thick scintillators, which are also efficient at higher photon energies. The influence of the source size and the photon energy spectrum is discussed by means of numerical simulations. Furthermore it is shown how the setup can be used for quality validation of refractive x-ray lenses. By the application of a coded mask, the focal spot intensity distribution of a microfocus x-ray tube was imaged, with a spatial resolution of a few microns. With the aid of this method, it is shown that the intensity distribution of the focal spot of a microfocus x-ray tube can be modified by structuring the anode.
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A novel setup for phase contrast imaging and a new method for imaging the intensity distribution of the focal spot of a microfocus x-ray tube are presented. By combination of a grating interferometer with projection magnification, high resolution phase contrast images were recorded under the application of thick scintillators, which are also efficient at higher photon energies. The influence of the source size and the photon energy spectrum is discussed by means of numerical simulations. Further...
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