Quantitative edge illumination x-ray phase contrast tomographyDevelopments in X-Ray Tomography

摘要

This article discusses two experimental setups of edge illumination (EI) x-ray phase contrast imaging (XPCi) as well asthe theory that is required to reconstruct quantitative tomographic maps using established methods, e.g. filtered backprojection (FBP). Tomographic EI XPCi provides the option to reconstruct volumetric maps of different physicalquantities, amongst which are the refractive index decrement from unity and the absorption coefficient, which can beused for dual-mode imaging. EI XPCi scans of a custom-built wire phantom using synchrotron and x-ray tube generatedradiation were carried out, and tomographic maps of both parameters were reconstructed. This article further discussesthe theoretical basis for the tomographic reconstruction of images showing combined phase and attenuation contrast.Corresponding experimental results are presented.