Open AccessX-ray phase tomography of a moving object
Author(s) -
Yongjin Sung,
Rajiv Gupta
Publication year - 2013
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.21.023671
Subject(s) - paraxial approximation , optics , tomography , tomographic reconstruction , ray tracing (physics) , smoothness , projection (relational algebra) , iterative reconstruction , computer science , refractive index , computer vision , piecewise , phase (matter) , object (grammar) , physics , artificial intelligence , algorithm , mathematics , beam (structure) , mathematical analysis , quantum mechanics
We propose an algorithm for tomographic reconstruction of the refractive index map of an object translated across a fan-shaped X-ray beam. We adopt a forward image model valid under the non-paraxial condition, and use a unique mapping of the acquired projection images to reduce the computational cost. Even though the imaging setup affords only a limited angular coverage, our algorithm provides accurate refractive index values by employing the positivity and piecewise-smoothness constraints.