Dark-field signal extraction in propagation-based phase-contrast imaging
Abstract
A method for extracting the dark-field signal in propagation-based phase-contrast imaging is proposed. In the case of objects consisting predominantly of a single material, or several different materials with similar ratios of the real decrement to the imaginary part of the complex refractive index, the proposed method requires a single image for extraction of the dark-field signal in two-dimensional projection imaging. In the case of three-dimensional tomographic imaging, the method needs only one image to be collected at each projection angle. A preliminary example demonstrates that this method can improve the visualization of microcalcifications in propagation-based X-ray breast cancer imaging. It is suggested that the proposed approach may be useful in other forms of biomedical imaging, where it can help one to obtain additional small-angle scattering information without increasing the radiation dose to the sample.
Cite
@article{arxiv.2003.12248,
title = {Dark-field signal extraction in propagation-based phase-contrast imaging},
author = {T. E. Gureyev and D. M. Paganin and B. Arhatari and S. T. Taba and S. Lewis and P. C. Brennan and H. M. Quiney},
journal= {arXiv preprint arXiv:2003.12248},
year = {2021}
}