Open AccessReduction of phase artifacts in differential phase contrast computed tomography
Author(s) -
Iwan Jerjen,
Vincent Revol,
Philipp Schuetz,
Christian Kottler,
R. Kaufmann,
Thomas Luethi,
Konstantins Jefimovs,
Claus Urban,
U. Sennhauser
Publication year - 2011
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.19.013604
Subject(s) - optics , differential phase , differential interference contrast microscopy , phase (matter) , interferometry , attenuation , refractive index , tomography , interference (communication) , phase contrast imaging , artifact (error) , physics , signal (programming language) , phase retrieval , differential (mechanical device) , phase contrast microscopy , fourier transform , computer science , artificial intelligence , microscopy , computer network , channel (broadcasting) , programming language , quantum mechanics , thermodynamics
X-ray differential phase contrast computed tomography (DPC CT) with a Talbot-Lau interferometer setup allows visualizing the three-dimensional distribution of the refractive index by measuring the shifts of an interference pattern due to phase variations of the X-ray beam. Unfortunately, severe reconstruction artifacts appear in the presence of differential phase wrapping and clipping. In this paper, we propose to use the attenuation contrast, which is obtained from the same measurement, for correcting the DPC signal. Using the example of a DPC CT measurement with pronounced phase artifacts, we will discuss the efficiency of our phase artifact correction method.