25 September 2017 High energy near- and far-field ptychographic tomography at the ESRF
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In high-resolution tomography, one needs high-resolved projections in order to reconstruct a high-quality 3D map of a sample. X-ray ptychography is a robust technique which can provide such high-resolution 2D projections taking advantage of coherent X-rays. This technique was used in the far-field regime for a fair amount of time, but it can now also be implemented in the near-field regime. In both regimes, the technique enables not only high-resolution imaging, but also high sensitivity to the electron density of the sample. The combination with tomography makes 3D imaging possible via ptychographic X-ray computed tomography (PXCT), which can provide a 3D map of the complex-valued refractive index of the sample. The extension of PXCT to X-ray energies above 15 keV is challenging, but it can allow the imaging of object opaque to lower energy. We present here the implementation and developments of high-energy near- and far-field PXCT at the ESRF.
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Julio C. da Silva, Julio C. da Silva, Jan Haubrich, Jan Haubrich, Guillermo Requena, Guillermo Requena, Maxime Hubert, Maxime Hubert, Alexandra Pacureanu, Alexandra Pacureanu, Leonid Bloch, Leonid Bloch, Yang Yang, Yang Yang, Peter Cloetens, Peter Cloetens, } "High energy near- and far-field ptychographic tomography at the ESRF", Proc. SPIE 10391, Developments in X-Ray Tomography XI, 1039106 (25 September 2017); doi: 10.1117/12.2272971; https://doi.org/10.1117/12.2272971

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