Phase-and-amplitude recovery from a single phase-contrast image using partially spatially coherent x-ray radiation

Beltran, M, Paganin, D and Pelliccia, D 2018, 'Phase-and-amplitude recovery from a single phase-contrast image using partially spatially coherent x-ray radiation', Journal of Optics, vol. 20, no. 5, pp. 1-5.


Document type: Journal Article
Collection: Journal Articles

Title Phase-and-amplitude recovery from a single phase-contrast image using partially spatially coherent x-ray radiation
Author(s) Beltran, M
Paganin, D
Pelliccia, D
Year 2018
Journal name Journal of Optics
Volume number 20
Issue number 5
Start page 1
End page 5
Total pages 5
Publisher Institute of Physics
Abstract A simple method of phase-and-amplitude extraction is derived that corrects for image blurring induced by partially spatially coherent incident illumination using only a single intensity image as input. The method is based on Fresnel diffraction theory for the case of high Fresnel number, merged with the space-frequency description formalism used to quantify partially coherent fields and assumes the object under study is composed of a single-material. A priori knowledge of the object's complex refractive index and information obtained by characterizing the spatial coherence of the source is required. The algorithm was applied to propagation-based phase-contrast data measured with a laboratory-based micro-focus x-ray source. The blurring due to the finite spatial extent of the source is embedded within the algorithm as a simple correction term to the so-called Paganin algorithm and is also numerically stable in the presence of noise.
Subject Optical Physics not elsewhere classified
Electrical and Electronic Engineering not elsewhere classified
Quantum Physics not elsewhere classified
Keyword(s) coherence theory
imaging systems
x-ray optics
DOI - identifier 10.1088/2040-8986/aabbdd
Copyright notice © 2018 IOP Publishing Ltd
ISSN 2040-8978
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