Simple and robust synchrotron and laboratory solutions for high-resolution multimodal X-ray phase-based imaging

X-Ray Microscopy Conference 2016

Endrizzi, M.^1 ; Vittoria, F.A.^1 ; Diemoz, P.C.^1 ; Kallon, G.K.^1 ; Basta, D.^1 ; Zamir, A.^1 ; Hagen, C.K.^1 ; Wagner, U.H.^2 ; Rau, C.^2 ; Robinson, I.K.^3,4 ; Olivo, A.^1,3

Department of Medical Physics and Biomedical Engineering, University College London, London

WC1E 6BT, United Kingdom^1

Diamond Light Source, Harwell Oxford Campus, Didcot

OX11 0DE, United Kingdom^2

Research Complex at Harwell, Harwell Oxford Campus, Didcot

OX11 0FA, United Kingdom^3

London Centre for Nanotechnology, London

WC1H 0AH, United Kingdom^4

关键词: Detection efficiency;    Differential phase;    High resolution;    Laboratory solution;    Simple rotation;    Simultaneous use;    Three-dimensional reconstruction;    X-ray phase-contrast imaging;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/849/1/012040/pdf
DOI  :  10.1088/1742-6596/849/1/012040

来源: IOP

【 摘 要 】

Edge illumination X-ray phase contrast imaging techniques are capable of quantitative retrieval of differential phase, absorption and X-ray scattering. We have recently developed a series of approaches enabling high-resolution implementations, both using synchrotron radiation and laboratory-based set-ups. Three-dimensional reconstruction of absorption, phase and dark-field can be achieved with a simple rotation of the sample. All these approaches share a common trait which consists in the use of an absorber that shapes the radiation field, in order to make the phase modulations introduced by the sample detectable. This enables a well-defined and high-contrast structuring of the radiation field as well as an accurate modelling of the effects that are related to the simultaneous use of a wide range of energies. Moreover, it can also be adapted for use with detectors featuring large pixel sizes, which could be desirable when a high detection efficiency is important.