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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Absorption and Phase Contrast X-Ray Imaging in Paleontology Using Laboratory and Synchrotron Sources

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Author(s):
Bidola, Pidassa [1] ; Stockmar, Marco [1] ; Achterhold, Klaus [1] ; Pfeiffer, Franz [1] ; Pacheco, Mirian L. A. F. [2] ; Soriano, Carmen [3] ; Beckmann, Felix [4] ; Herzen, Julia [1]
Total Authors: 8
Affiliation:
[1] Tech Univ Munich, Dept Phys, D-85748 Garching - Germany
[2] Univ Fed Sao Carlos, Dept Biol, BR-18052780 Sorocaba, SP - Brazil
[3] Argonne Natl Lab, Adv Photon Source, Lemont, IL 60439 - USA
[4] Helmholtz Ctr Geesthacht, Inst Mat Res, D-21502 Geesthacht - Germany
Total Affiliations: 4
Document type: Journal article
Source: Microscopy and Microanalysis; v. 21, n. 5, p. 1288-1295, OCT 2015.
Web of Science Citations: 0
Abstract

X-ray micro-computed tomography (CT) is commonly used for imaging of samples in biomedical or materials science research. Owing to the ability to visualize a sample in a nondestructive way, X-ray CT is perfectly suited to inspect fossilized specimens, which are mostly unique or rare. In certain regions of the world where important sedimentation events occurred in the Precambrian geological time, several fossilized animals are studied to understand questions related to their origin, environment, and life evolution. This article demonstrates the advantages of applying absorption and phase-contrast CT on the enigmatic fossil Corumbella werneri, one of the oldest known animals capable of building hard parts, originally discovered in Corumba (Brazil). Different tomographic setups were tested to visualize the fossilized inner structures: a commercial laboratory-based CT device, two synchrotron-based imaging setups using conventional absorption and propagation-based phase contrast, and a commercial X-ray microscope with a lens-coupled detector system, dedicated for radiography and tomography. Based on our results we discuss the strengths and weaknesses of the different imaging setups for paleontological studies. (AU)

FAPESP's process: 09/02312-4 - Morphological reconstitution and systematic analysis of Corumbella werneri Hahn et al. 1982 (Tamengo Formation, Ediacaran, Corumbá Group), Mato Grosso do Sul, Brazil: paleoecological and taphonomical implications.
Grantee:Mírian Liza Alves Forancelli Pacheco
Support Opportunities: Scholarships in Brazil - Doctorate