Improving the visibility of phase gratings for Talbot-Lau X-ray imaging
- Talbot-Lau interferometry provides X-ray imaging techniques with significant enhancement of the radiographic contrast of weakly absorbing objects. The grating based technique allows separation of absorption, refraction and small angle scattering effects. The different efficiency of rectangular and triangular shaped phase gratings at varying detector distances is investigated. The interference patterns (Talbot carpets) are modeled for parallel monochromatic radiation and measured by synchrotron radiation. In comparison to rectangular shapes of phase gratings much higher visibility is obtained for triangular shapes which yield enhanced contrast of a glass capillary test specimen.
| Author details: | Yury Shashev, Andreas KupschORCiD, Axel Lange, Bernd R. Müller, Giovanni BrunoORCiDGND |
|---|---|
| DOI: | https://doi.org/10.3139/120.110948 |
| ISSN: | 0025-5300 |
| Title of parent work (English): | Materials testing : Materialprüfung ; materials and components, technology and application |
| Publisher: | Hanser |
| Place of publishing: | München |
| Publication type: | Article |
| Language: | English |
| Year of first publication: | 2016 |
| Publication year: | 2016 |
| Release date: | 2020/03/22 |
| Tag: | Talbot-Lau interferometry; X-ray refraction; phase grating; synchrotron imaging; visibility |
| Volume: | 58 |
| Number of pages: | 5 |
| First page: | 970 |
| Last Page: | 974 |
| Funding institution: | Federal Institute for Materials Research and Testing within the MIS program |
| Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie |
| Peer review: | Referiert |
