TY  - JOUR
TI  - Compact and cost effective lab-based edge-illumination X-ray phase contrast imaging with a structured focal spot
AV  - public
VL  - 108
Y1  - 2016/06/03/
IS  - 22
N1  - © 2016 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
N2  - We present a different implementation of the Edge Illumination (EI) X-ray Phase Contrast imaging method based on the use of multiple focal spots created through an additional x-ray mask. While this resembles directly inspired by the Talbot-Lau implementation of grating interferometry, the aim of the source mask and its effect on the acquired images are different. The individual ?sourcelets? are much larger than in grating methods, and then still spatially incoherent; however their use allows a) exploiting cheap and large focal spot sources and b) reducing the source spot size from the usual 70-100 ?m typically used in EI to few tens of ?m, which enables the realisation of more compact setups. However, in EI, multiple sources create images shifted by one detector pixel with respect to the other, imposing the use of an image restoration algorithm. Here we show that the approach is feasible by deconvolving differential phase-contrast image profiles acquired with three separate sources, and comparing results with simulation predictions for equivalent profiles generated by a single source. We also show that this enables reducing the system length from the 2 m used so far to 1 m.
ID  - discovery1493236
UR  - http://dx.doi.org/10.1063/1.4953459
SN  - 1077-3118
JF  - Applied Physics Letters
A1  - Basta, D
A1  - Endrizzi, M
A1  - Vittoria, FA
A1  - Astolfo, A
A1  - Olivo, A
KW  - Key Topics
Diffraction gratings
Illumination
Image sensors
X-ray imaging
Interferometry
ER  -