Repositorio de producción científica de la Universidad de Sevilla

Removing the effects of the “dark matter” in tomography

Opened Access Removing the effects of the “dark matter” in tomography


buscar en

Exportar a
Autor: Cervera Gontard, Lionel
Fecha: 2015
Publicado en: Ultramicroscopy, 154, 64-72.
Tipo de documento: Artículo
Resumen: Electron tomography (ET) using different imaging modes has been progressively consolidating its position as a key tool in materials science. The fidelity of a tomographic reconstruction, or tomogram, is affected by several experimental factors. Most often, an unrealistic cloud of intensity that does not correspond to a real material phase of the specimen (“dark matter”) blurs the tomograms and enhances artefacts arising from the missing wedge (MW). Here we show that by simple preprocessing of the background level of any tomographic tilt series, it is possible to minimise the negative effects of that “dark matter”. Iterative reconstruction algorithms converge better, leading to tomograms with fewer streaking artefacts from the MW, more contrast, and increased accuracy. The conclusions are valid irrespective of the imaging mode used, and the methodology improves the segmentation and visualisation of tomograms of both crystalline and amorphous materials. We show examples of HAADF STEM an...
[Ver más]
Cita: Cervera Gontard, L. (2015). Removing the effects of the “dark matter” in tomography. Ultramicroscopy, 154, 64-72.
Tamaño: 6.388Mb
Formato: PDF


DOI: 10.1016/j.ultramic.2015.03.017

Ver versión del editor

Mostrar el registro completo del ítem

Esta obra está bajo una Licencia Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 Internacional

Este registro aparece en las siguientes colecciones