| Autor: |
Georg, Pelzer, Andrea, Zang, Gisela, Anton, Florian, Bayer, Florian, Horn, Manuel, Kraus, Jens, Rieger, Andre, Ritter, Johannes, Wandner, Thomas, Weber, Alex, Fauler, Michael, Fiederle, Winnie S, Wong, Michael, Campbell, Jan, Meiser, Pascal, Meyer, Jürgen, Mohr, Thilo, Michel |
| Rok vydání: |
2014 |
| Zdroj: |
Optics express. 22(20) |
| ISSN: |
1094-4087 |
| Popis: |
The dark-field image obtained in grating-based x-ray phase-contrast imaging can provide information about the objects' microstructures on a scale smaller than the pixel size even with low geometric magnification. In this publication we demonstrate that the dark-field image quality can be enhanced with an energy-resolving pixel detector. Energy-resolved x-ray dark-field images were acquired with a 16-energy-channel photon-counting pixel detector with a 1 mm thick CdTe sensor in a Talbot-Lau x-ray interferometer. A method for contrast-noise-ratio (CNR) enhancement is proposed and validated experimentally. In measurements, a CNR improvement by a factor of 1.14 was obtained. This is equivalent to a possible radiation dose reduction of 23%. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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