%L discovery10197178
%I Elsevier BV
%D 2024
%O © 2024 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
%T Recent developments in fly scan methods for phase and multi-contrast x-ray micro-CT based on amplitude modulated beams
%X Beam tracking and edge illumination are phase contrast imaging techniques that rely on amplitude modulated x-ray beams to generate sensitivity to refraction and scattering. While each technique has its advantage (“single shot” three-contrast imaging in beam tracking; the ability to work with relatively large pixels in edge illumination), they also share a common drawback, namely that the modulator shields parts of the sample and, thus, prevents those areas from contributing to the image (under-sampling). Sample stepping, by which frames are acquired with the sample in a different position relative to the modulator (sometimes referred to as “dithering”) can produce well-sampled images. However, in computed tomography (CT), stepping must be performed at each rotation angle, enforcing step-and-shoot acquisitions and leading to long scan times. To enable faster acquisitions, fly scan compatible scanning schemes based on “roto-translating” the sample in the modulated x-ray beam were recently developed. This article reviews these schemes and provides practical guidance for their implementation.
%K X-ray micro-computed tomography, Phase contrast imaging, Fly scans, Rapid scanning, High-throughput scanning, Methods development
%A Grammatiki Lioliou
%A Oriol Roche i Morgó
%A Alberto Astolfo
%A Amir Reza Zekavat
%A Marco Endrizzi
%A David Bate
%A Silvia Cipiccia
%A Alessandro Olivo
%A Charlotte Hagen
%V 5
%J Tomography of Materials and Structures