期刊
OPTICS EXPRESS
卷 21, 期 22, 页码 25677-25684出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.21.025677
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资金
- German Ministry for Education and Research (BMBF) within the cluster of excellence Medical Valley EMN [13EX1212B]
- Deutsche Forschungsgemeinschaft
- Friedrich-Alexander-Universitat Erlangen-Nurnberg
We have carried out grating-based x-ray differential phase-contrast measurements with a hybrid pixel detector in 16 energy channels simultaneously. A method for combining the energy resolved phase-contrast images based on energy weighting is presented. An improvement in contrast-to-noise ratio by 58.2% with respect to an emulated integrating detector could be observed in the final image. The same image quality could thus be achieved with this detector and with energy weighting at 60.0% reduced dose compared to an integrating detector. The benefit of the method depends on the object, spectrum, interferometer design and the detector efficiency. (c) 2013 Optical Society of America.
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