Berlin 2018 – wissenschaftliches Programm

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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur

KFM 10: Spectroscopy and Microscopy I with X-rays and Ions

KFM 10.3: Vortrag

Dienstag, 13. März 2018, 10:20–10:40, EMH 225

Tomography with extended sources — •Leon Merten Lohse, Malte Vassholz, and Tim Salditt — Institut für Röntgenphysik, Friedrich-Hund-Platz 1, 37077 Göttingen, Deutschland

X-ray computed tomography (CT) is widely used today for nondestructive 3D imaging. In practice, the achievable resolution for analytical CT in the laboratory is still limited by the low brilliance of table top sources. One way to overcome this limitation is the use of a line source, as has been demonstrated recently [2]. The larger x-ray source spot allows more photons to contribute to image formation. It has been shown that a reconstruction scheme based on the 3D Radon transform is in fact compatible with a line source and the impact on the resolution can be controlled to be minor [1]. As the method allows to increase the flux at constant resolution, it promises to overcome the trade-off between acquisition time and resolution, and ultimately to allow higher resolutions in laboratory-based analytical CT.

[1] L. M. Lohse et al. "Tomography with extended sources: ...", Phys. Rev. A (accepted 11/2017) [2] M. Vassholz et al. "New X-Ray Tomography Method ... ", Phys. Rev. Lett. (2016)