Combining SART and CTF for 3D phase retrieval in X-ray in-line phase tomography

Loriane Weber (1, 2) , Max Langer (1, 2) , Peter Cloetens (1) , Francoise Peyrin (1, 2)

1 ESRF - European Synchrotron Radiation Facility
2 Imagerie Tomographique et Radiothérapie

This paper presents a new iterative algorithm for X-ray in-line phase tomography. It combines the phase retrieval and the tomographic reconstruction, previously regarded and solved as two distinct problems, in a single step. The Contrast Transfer Function (CTF), a linear phase contrast model, is coupled to the simultaneous algebraic reconstruction technique. The aim is to reduce the a priori assumptions about the imaged sample used in conventional approaches. We have derived an analytical expression for this framework for two different types of samples: pure phase objects and weakly absorbing objects. In a first step, the resulting algorithm has been tested on simulated data.

Domaines: Imagerie

Loriane Weber, Max Langer, Peter Cloetens, Francoise Peyrin. Combining SART and CTF for 3D phase retrieval in X-ray in-line phase tomography. 2015 IEEE 12th International Symposium on Biomedical Imaging (ISBI), Apr 2015, New-York, United States. ⟨hal-01274028⟩