ArticleProceedings of the National Academy of Sciences of the United States of America2021
Hard X-ray omnidirectional differential phase and dark-field imaging.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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6 citing papers in PubMed, 10 citations in OpenAlex.
- Speckle-based curvature optical metrology.Light, science & applications · 2026Article
- Development of a nanometre scale X-ray speckle-based CT technique through the 3-D histological assessment of an acute respiratory distress syndrome model.Scientific reports · 2024Article
- Article
- On the definition, utility, and practical implementation of X-ray omnidirectional differential phase contrast and dark-field imaging.Proceedings of the National Academy of Sciences of the United States of America · 2021Article
- Reply to Kagias and Stampanoni: High-sensitivity hard X-ray directional differential phase imaging.Proceedings of the National Academy of Sciences of the United States of America · 2021Article
- Nano-precision metrology of X-ray mirrors with laser speckle angular measurement.Light, science & applications · 2021Article
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Authors and funding
2 authors at 1 institution in 1 country.
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No grant is acknowledged in the PubMed record.
Abstract
Ever since the discovery of X-rays, tremendous efforts have been made to develop new imaging techniques for unlocking the hidden secrets of our world and enriching our understanding of it. X-ray differential phase contrast imaging, which measures the gradient of a sample's phase shift, can reveal more detail in a weakly absorbing sample than conventional absorption contrast. However, normally only the gradient's component in two mutually orthogonal directions is measurable. In this article, omnidirectional differential phase images, which record the gradient of phase shifts in all directions of the imaging plane, are efficiently generated by scanning an easily obtainable, randomly structured modulator along a spiral path. The retrieved amplitude and main orientation images for differential phase yield more information than the existing imaging methods. Importantly, the omnidirectional dark-field images can be simultaneously extracted to study strongly ordered scattering structures. The proposed method can open up new possibilities for studying a wide range of complicated samples composed of both heavy, strongly scattering atoms and light, weakly scattering atoms.
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