Open AccessReliable method for calculating the center of rotation in parallel-beam tomography
Author(s) -
Nghia T. Vo,
Michael Drakopoulos,
Robert C. Atwood,
Christina Reinhard
Publication year - 2014
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.22.019078
Subject(s) - optics , rotation (mathematics) , fourier transform , computer science , tomography , image quality , image processing , iterative reconstruction , signal to noise ratio (imaging) , beam (structure) , throughput , center (category theory) , noise (video) , instant centre of rotation , physics , computer vision , image (mathematics) , telecommunications , chemistry , quantum mechanics , crystallography , wireless
High-throughput processing of parallel-beam X-ray tomography at synchrotron facilities is lacking a reliable and robust method to determine the center of rotation in an automated fashion, i.e. without the need for a human scorer. Well-known techniques based on center of mass calculation, image registration, or reconstruction evaluation work well under favourable conditions but they fail in cases where samples are larger than field of view, when the projections show low signal-to-noise, or when optical defects dominate the contrast. Here we propose an alternative technique which is based on the Fourier analysis of the sinogram. Our technique shows excellent performance particularly on challenging data.