Hybrid dark-field and attenuation contrast retrieval for laboratory-based X-ray tomography.

ABSTRACT: X-ray dark-field imaging highlights sample structures through contrast generated by sub-resolution features within the inspected volume. Quantifying dark-field signals generally involves multiple exposures for phase retrieval, separating contributions from scattering, refraction, and attenuation. Here, we introduce an approach for non-interferometric X-ray dark-field imaging that presents a single-parameter representation of the sample. This fuses attenuation and dark-field signals, enabling the reconstruction of a unified three-dimensional volume. Notably, our method can obtain dark-field contrast from a single exposure and employs conventional back projection algorithms for reconstruction. Our approach is based on the assumption of a macroscopically homogeneous material, which we validat

SUBMITTER: Doherty A 

PROVIDER: S-EPMC11674740 | biostudies-literature | 2024 Dec

REPOSITORIES: biostudies-literature