16 June 2014 Performance of X-ray grating interferometry at high energy
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A theoretical description of the performance of a Talbot and Talbot-Lau type interferometers is developed, providing a framework for the optimization of the geometry for monochromatic and polychromatic beams. Analytical formulas for the smallest detectable refraction angle and the visibility of the setup are derived. The polychromatic visibility of the interference fringes is particularly relevant for the design of setups with conventional X-ray tubes, and it is described in terms of the spectrum of the source and the type of beamsplitter grating. We show the practical realization of such a design by imaging a metallic screw at 100 keV.
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Matteo Abis, Matteo Abis, Thomas Thüring, Thomas Thüring, Marco Stampanoni, Marco Stampanoni, "Performance of X-ray grating interferometry at high energy", Proc. SPIE 9033, Medical Imaging 2014: Physics of Medical Imaging, 903354 (16 June 2014); doi: 10.1117/12.2041270; https://doi.org/10.1117/12.2041270


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