Fast implicit diffusive dark-field retrieval for single-exposure, single-mask x-ray imaging

Mario A. Beltran, David M. Paganin, Michelle K. Croughan, Kaye S. Morgan

Research output: Contribution to journalArticleResearchpeer-review

5 Citations (Scopus)

Abstract

Complementary to conventional and phase x-ray radiography, dark-field imaging has become central in visualizing diffusive scattering signals that come from 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 noniterative. 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.

Original languageEnglish
Pages (from-to)422-429
Number of pages8
JournalOptica
Volume10
Issue number4
DOIs
Publication statusPublished - 20 Apr 2023

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