Tomographic reconstruction using tilted Laue analyser-based X-ray phase-contrast imaging

Type of content
Journal Article
Thesis discipline
Degree name
Publisher
International Union of Crystallography (IUCr)
Journal Title
Journal ISSN
Volume Title
Language
eng
Date
2021
Authors
Chalmers MC
Kitchen MJ
Uesugi K
Falzon G
Quine P
Pavlov, Konstantin
Abstract

Analyser-based phase-contrast imaging (ABPCI) is a highly sensitive phase-contrast imaging method that produces high-contrast images of weakly absorbing materials. However, it is only sensitive to phase gradient components lying in the diffraction plane of the analyser crystal [i.e. in one dimension (1-D)]. In order to accurately account for and measure phase effects produced by the wavefield-sample interaction, ABPCI and other 1-D phase-sensitive methods must achieve 2-D phase gradient sensitivity. An inclined geometry method was applied to a Laue geometry setup for X-ray ABPCI through rotation of the detector and object about the optical axis. This allowed this traditionally 1-D phase-sensitive phase-contrast method to possess 2-D phase gradient sensitivity. Tomographic datasets were acquired over 360° of a multi-material phantom with the detector and sample tilted by 8°. The real and imaginary parts of the refractive index were reconstructed for the phantom.

Description
Citation
Chalmers MC, Kitchen MJ, Uesugi K, Falzon G, Quine P, Pavlova KM (2021). Tomographic reconstruction using tilted Laue analyser-based X-ray phase-contrast imaging. Journal of Synchrotron Radiation. 28(Pt 1). 283-291.
Keywords
analyser-based imaging, phase retrieval, phase-contrast imaging, phase-contrast tomography
Ngā upoko tukutuku/Māori subject headings
ANZSRC fields of research
0204 Condensed Matter Physics
0205 Optical Physics
0306 Physical Chemistry (incl. Structural)
Fields of Research::51 - Physical sciences::5105 - Medical and biological physics
Fields of Research::51 - Physical sciences::5102 - Atomic, molecular and optical physics
Fields of Research::40 - Engineering::4003 - Biomedical engineering
Rights
All rights reserved unless otherwise stated