Synchrotron X-ray imaging is constantly achieving higher spatial resolution. In the field of grating-based phase- contrast imaging, these developments allow to directly resolve the interference patterns created by a phase grating without need for a analyzer grating. In this study we analyzed the performance of a single-grating interferometer and compared it to a conventional double-grating interferometer. Based on simulations and measurements of a test phantom we evaluated the sensitivity, resolution and signal to noise ratios of different setup configurations.
In this article we present the quantitative characterization of CCD and CMOS sensors which are used at the experiments
for microtomography operated by HZG at PETRA III at DESY in Hamburg, Germany. A standard commercial CCD
camera is compared to a camera based on a CMOS sensor. This CMOS camera is modified for grating-based differential
The main goal of the project is to quantify and to optimize the statistical parameters of this camera system. These key
performance parameters such as readout noise, conversion gain and full-well capacity are used to define an optimized
measurement for grating-based phase-contrast. First results will be shown.
Conventional absorption-based imaging often lacks in good contrast at special applications like visualization of
soft tissue or weak absorbing material in general. To overcome this limitation, several new X-ray phase-contrast
imaging methods have been developed at synchrotron radiation facilities. Our aim was to establish the possibility
of different phase-contrast imaging modalities at the Imaging Beamline (IBL, P05) and the High Energy
Material Science beamline (HEMS, P07) at Petra III (DESY, Germany). Here we present the instrumentation
and the status of the currently successfully established phase-contrast imaging techniques. First results from
measurements of biomedical samples will be presented as demonstration.