Open AccessA simplified approach for computed tomography with an X-ray grating interferometer
Author(s) -
Paul C. Diémoz,
Paola Coan,
Irène Zanette,
Alberto Bravin,
Sabrina Lang,
Christian Gläser,
Timm Weitkamp
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.19.001691
Subject(s) - optics , imaging phantom , interferometry , grating , refraction , tomography , sample (material) , medical imaging , physics , computer science , artificial intelligence , thermodynamics
We present a simplified acquisition and processing method for X-ray grating interferometry computed tomography (CT). The proposed approach eliminates the need to scan the gratings, thus allowing for a faster CT acquisition compared to methods presently in use. The contrast in the reconstructed images can be expressed as a linear combination of the absorption and refraction within the sample. Experimental images of a test phantom made of known materials and a human bone-cartilage sample prove the correctness of the method and show very good agreement with the theory. The here proposed approach might be highly interesting in many fields where a reduced imaging acquisition time is requested and/or where the radiation dose delivered to the sample has to be kept low, such as, for example, in in-vivo imaging.