CPPM PhD days 2 : ImXgam

jeudi 6 oct. 2016, 13:30 → 15:00 Europe/Paris

Amphithéâtre (CPPM)

13:30 - 13:45 Overview of the imXgam activities (Christian Morel)

13:45 - 14:15 PhD Student présentation

Simultaneous reconstruction and separation in a spectral CT framework.

Souhil Tairi

We propose a method to simultaneously separate and reconstruct the physical components of an object observed in the context of spectral Computed Tomography (CT). Spectral CT has been made possible by the technological breakthrough of X-ray hybrid pixel detectors in the last years and brings CT imaging from an anatomic to a functional biomedical imaging modality. Our paper considers the polychromatic model and combines it with a low-rank prior on the components. The simultaneous separation and reconstruction of the components is done by solving a non-convex ill-posed inverse problem. Promising results are shown on synthetic data with a simple regularization.