Non-destructive wood identification using X-ray µCT scanning: which resolution do we need?

Tropical wood species Wood identification X-ray µCT-scanning

Journal

Plant methods
ISSN: 1746-4811
Titre abrégé: Plant Methods
Pays: England
ID NLM: 101245798

Informations de publication

Date de publication:
24 Jun 2024
Historique:
received: 07 03 2024
accepted: 30 05 2024
medline: 25 6 2024
pubmed: 25 6 2024
entrez: 24 6 2024
Statut: epublish

Résumé

Taxonomic identification of wood specimens provides vital information for a wide variety of academic (e.g. paleoecology, cultural heritage studies) and commercial (e.g. wood trade) purposes. It is generally accomplished through the observation of key anatomical features. Classic methodologies mostly require destructive sub-sampling, which is not always acceptable. X-ray computed micro-tomography (µCT) is a promising non-destructive alternative since it allows a detailed non-invasive visualization of the internal wood structure. There is, however, no standardized approach that determines the required resolution for proper wood identification using X-ray µCT. Here we compared X-ray µCT scans of 17 African wood species at four resolutions (1 µm, 3 µm, 8 µm and 15 µm). The species were selected from the Xylarium of the Royal Museum for Central Africa, Belgium, and represent a wide variety of wood-anatomical features. For each resolution, we determined which standardized anatomical features can be distinguished or measured, using the anatomical descriptions and microscopic photographs on the Inside Wood Online Database as a reference. We show that small-scale features (e.g. pits and fibres) can be best distinguished at high resolution (especially 1 µm voxel size). In contrast, large-scale features (e.g. vessel porosity or arrangement) can be best observed at low resolution due to a larger field of view. Intermediate resolutions are optimal (especially 3 µm voxel size), allowing recognition of most small- and large-scale features. While the potential for wood identification is thus highest at 3 µm, the scans at 1 µm and 8 µm were successful in more than half of the studied cases, and even the 15 µm resolution showed a high potential for 40% of the samples. The results show the potential of X-ray µCT for non-destructive wood identification. Each of the four studied resolutions proved to contain information on the anatomical features and has the potential to lead to an identification. The dataset of 17 scanned species is made available online and serves as the first step towards a reference database of scanned wood species, facilitating and encouraging more systematic use of X-ray µCT for the identification of wood species.

Sections du résumé

BACKGROUND BACKGROUND
Taxonomic identification of wood specimens provides vital information for a wide variety of academic (e.g. paleoecology, cultural heritage studies) and commercial (e.g. wood trade) purposes. It is generally accomplished through the observation of key anatomical features. Classic methodologies mostly require destructive sub-sampling, which is not always acceptable. X-ray computed micro-tomography (µCT) is a promising non-destructive alternative since it allows a detailed non-invasive visualization of the internal wood structure. There is, however, no standardized approach that determines the required resolution for proper wood identification using X-ray µCT. Here we compared X-ray µCT scans of 17 African wood species at four resolutions (1 µm, 3 µm, 8 µm and 15 µm). The species were selected from the Xylarium of the Royal Museum for Central Africa, Belgium, and represent a wide variety of wood-anatomical features.
RESULTS RESULTS
For each resolution, we determined which standardized anatomical features can be distinguished or measured, using the anatomical descriptions and microscopic photographs on the Inside Wood Online Database as a reference. We show that small-scale features (e.g. pits and fibres) can be best distinguished at high resolution (especially 1 µm voxel size). In contrast, large-scale features (e.g. vessel porosity or arrangement) can be best observed at low resolution due to a larger field of view. Intermediate resolutions are optimal (especially 3 µm voxel size), allowing recognition of most small- and large-scale features. While the potential for wood identification is thus highest at 3 µm, the scans at 1 µm and 8 µm were successful in more than half of the studied cases, and even the 15 µm resolution showed a high potential for 40% of the samples.
CONCLUSIONS CONCLUSIONS
The results show the potential of X-ray µCT for non-destructive wood identification. Each of the four studied resolutions proved to contain information on the anatomical features and has the potential to lead to an identification. The dataset of 17 scanned species is made available online and serves as the first step towards a reference database of scanned wood species, facilitating and encouraging more systematic use of X-ray µCT for the identification of wood species.

Identifiants

pubmed: 38915095
doi: 10.1186/s13007-024-01216-0
pii: 10.1186/s13007-024-01216-0
doi:

Types de publication

Journal Article

Langues

eng

Pagination

98

Subventions

Organisme : Belgian Federal Science Policy Office
ID : B2/191/p2/TOCOWO
Organisme : Belgian Federal Science Policy Office
ID : FED-tWIN2019-prf-075
Organisme : Bijzonder Onderzoeksfonds UGent
ID : BOF.COR.2022.008

Informations de copyright

© 2024. The Author(s).

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Auteurs

Sofie Dierickx (S)

Cultural Anthropology and History Department, Royal Museum for Central Africa, Leuvensesteenweg 7, 3080, Tervuren, Belgium. sofie.dierickx@africamuseum.be.
UGent-Woodlab-Laboratory of Wood technology, Department of Environment, Faculty of Bioscience Engineering, Ghent University, Proeftuinstraat 86/N12, 9000, Ghent, Belgium. sofie.dierickx@africamuseum.be.
UGCT, Ghent University, Proeftuinstraat 86/N12, 9000, Ghent, Belgium. sofie.dierickx@africamuseum.be.

Siska Genbrugge (S)

Cultural Anthropology and History Department, Royal Museum for Central Africa, Leuvensesteenweg 7, 3080, Tervuren, Belgium.

Hans Beeckman (H)

Wood Biology Department, Royal Museum for Central Africa, Leuvensesteenweg 7, 3080, Tervuren, Belgium.

Wannes Hubau (W)

UGent-Woodlab-Laboratory of Wood technology, Department of Environment, Faculty of Bioscience Engineering, Ghent University, Proeftuinstraat 86/N12, 9000, Ghent, Belgium.
Wood Biology Department, Royal Museum for Central Africa, Leuvensesteenweg 7, 3080, Tervuren, Belgium.

Pierre Kibleur (P)

Radiation Physics Research Group, Department Physics and Astronomy, Ghent University, Proeftuinstraat 86/N12, 9000, Ghent, Belgium.
UGCT, Ghent University, Proeftuinstraat 86/N12, 9000, Ghent, Belgium.

Jan Van den Bulcke (J)

UGent-Woodlab-Laboratory of Wood technology, Department of Environment, Faculty of Bioscience Engineering, Ghent University, Proeftuinstraat 86/N12, 9000, Ghent, Belgium.
UGCT, Ghent University, Proeftuinstraat 86/N12, 9000, Ghent, Belgium.

Classifications MeSH