Abstract
Analyzer-based phase-contrast computed tomography (CT) can image biological soft tissues and soft materials at a high contrast, which cannot be clearly depicted by contemporary CT based on absorption contrast. It reconstructs a distribution of refractive index from projections, whose data each is an angular deviation from incident direction due to refraction by an object, and is acquired by imaging methods using an angular analyzer, e.g., DEI (diffraction enhance imaging), or DFI (dark field imaging). So far, some kinds of reconstruction algorithms to obtain a refractive-index distribution have been proposed. In this talk, we introduce the outline of their fundamental concepts.
