Post-detection analysis for grating-based ultra-small angle X-ray scattering.

Details

Serval ID
serval:BIB_82F9746922E2
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Post-detection analysis for grating-based ultra-small angle X-ray scattering.
Journal
Physica Medica
Author(s)
Scattarella F., Tangaro S., Modregger P., Stampanoni M., De Caro L., Bellotti R.
ISSN
1724-191X (Electronic)
ISSN-L
1120-1797
Publication state
Published
Issued date
2013
Peer-reviewed
Oui
Volume
29
Number
5
Pages
478-486
Language
english
Notes
Publication types: Journal Article Publication Status: ppublish
Abstract
Until recently, the hard X-ray, phase-sensitive imaging technique called grating interferometry was thought to provide information only in real space. However, by utilizing an alternative approach to data analysis we demonstrated that the angular resolved ultra-small angle X-ray scattering distribution can be retrieved from experimental data. Thus, reciprocal space information is accessible by grating interferometry in addition to real space. Naturally, the quality of the retrieved data strongly depends on the performance of the employed analysis procedure, which involves deconvolution of periodic and noisy data in this context. The aim of this article is to compare several deconvolution algorithms to retrieve the ultra-small angle X-ray scattering distribution in grating interferometry. We quantitatively compare the performance of three deconvolution procedures (i.e., Wiener, iterative Wiener and Lucy-Richardson) in case of realistically modeled, noisy and periodic input data. The simulations showed that the algorithm of Lucy-Richardson is the more reliable and more efficient as a function of the characteristics of the signals in the given context. The availability of a reliable data analysis procedure is essential for future developments in grating interferometry.
Pubmed
Web of science
Create date
21/02/2014 19:23
Last modification date
20/08/2019 15:42
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