Fast implicit diffusive dark-field retrieval for single-exposure, single-mask x-ray imaging
Abstract
Complementary to conventional and phase X-ray radiography, dark-field imaging has become central in visualizing diffusive scattering signal due to the spatially-unresolved texture within an object. To date most diffusive-dark-field retrieval methods require either the acquisition of multiple images at the cost of higher radiation dose or significant amounts of computational memory and time. In this work, a simple method of X-ray diffusive dark-field retrieval is presented, applicable to any single-mask imaging setup, with only one exposure of the sample. The approach, which is based on a model of geometric and diffusive reverse-flow conservation, is implicit and non-iterative. This numerically fast methodology is applied to experimental X-ray images acquired using both a random mask and a grid mask, giving high quality reconstructions that are very stable in the presence of noise. The method should be useful for high-speed imaging and/or imaging with low-flux sources.
Cite
@article{arxiv.2211.07399,
title = {Fast implicit diffusive dark-field retrieval for single-exposure, single-mask x-ray imaging},
author = {Mario A. Beltran and David M. Paganin and Michelle K. Croughan and Kaye S. Morgan},
journal= {arXiv preprint arXiv:2211.07399},
year = {2023}
}