Hard-X-ray directional dark-field imaging using the speckle scanning technique.
TLDR
A novel approach to generate high-quality dark-field images using a simple membrane by applying a cross-correlation algorithm to a stack of speckle images collected by scanning a membrane in a transverse direction to the incident x-ray beam.Abstract:
X-ray dark-field imaging can provide inaccessible and complementary information compared to conventional absorption contrast imaging. However, extraction of the dark-field signal is difficult, and sophisticated optics are often required. In this Letter, we report a novel approach to generate high-quality dark-field images using a simple membrane. The dark-field image is extracted from the maximum correlation coefficient by applying a cross-correlation algorithm to a stack of speckle images collected by scanning a membrane in a transverse direction to the incident x-ray beam. The new method can also provide directional dark-field information, which is extremely useful for the study of strongly ordered systems. The potential of the proposed technique for nondestructive x-ray imaging is demonstrated by imaging representative samples.read more
Citations
More filters
Journal ArticleDOI
State of the Art of X-ray Speckle-Based Phase-Contrast and Dark-Field Imaging
TL;DR: An overview of the state of the art of the X-ray speckle-based technique is provided, its basic principles and different experimental implementations as well as the the latest advances and applications are illustrated.
Journal ArticleDOI
From synchrotron radiation to lab source: advanced speckle-based X-ray imaging using abrasive paper.
TL;DR: This report demonstrates that absorption, dark-field, phase contrast, and two orthogonal differential phase contrast images can simultaneously be generated by scanning a piece of abrasive paper in only one direction and proposes a novel theoretical approach to quantitatively extract the above five images by utilising the remarkable properties of speckles.
Journal ArticleDOI
X-ray Phase-Contrast Radiography and Tomography with a Multiaperture Analyzer.
Marco Endrizzi,Fabio A. Vittoria,Luigi Rigon,Luigi Rigon,Diego Dreossi,Francesco Iacoviello,Paul R. Shearing,Alessandro Olivo +7 more
TL;DR: The method is tested on custom-built phantoms with synchrotron radiation: sample absorption and phase can be reliably retrieved also in combination with strong scatterers, simultaneously attaining high sensitivity and dynamic range.
Journal ArticleDOI
High energy X-ray phase and dark-field imaging using a random absorption mask.
TL;DR: This work presents an alternative X-ray imaging approach to produce transmission, phase and scattering signals at highX-ray energies by using a random absorption mask, and has been demonstrated for practical imaging application with a laboratory-based microfocus X-rays source.
Journal ArticleDOI
Quantitative X-ray dark-field and phase tomography using single directional speckle scanning technique
TL;DR: In this article, the authors deduce a relationship between the second moment of scattering angle distribution and cross-correlation degradation of speckle and establish a quantitative basis of X-ray dark-field contrast tomography using single-directional laser scanning technique.