3D imaging of microstructure of spruce wood

Trtik, Pavel; Dual, Jürg; Keunecke, Daniel; Mannes, David; Niemz, Peter; Stähli, Patrick; Kaestner, Anders; Groso, Amela; Stampanoni, Marco

doi:10.1016/j.jsb.2007.02.003

Cited by 124 publications

(77 citation statements)

References 37 publications

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“…The associated data processing allows acquisition of spatial information even of subcellular structures with a resolution of 0.35 μ m Stampanoni et al 2006a,b ) and observations of different anatomical elements. Both methods provided useful data from in situ mechanical experiments with wood (Trtik et al 2007 ;Walther and Thoemen 2009 ;Hass et al 2010 ;Mannes et al 2010 ), either by means of manual or automatic testing devices (Badel et al 2008 ;Forsberg et al 2008 ). Suitable testing devices seem to be a bottleneck in this type of experiments.…”

Section: Introductionmentioning

confidence: 99%

Synchrotron-based tomographic microscopy (SbTM) of wood: development of a testing device and observation of plastic deformation of uniaxially compressed Norway spruce samples

et al. 2012

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To understand better the structure-property relationships of wood in situ, nondestructive synchrotron-based tomographic microscopy (SbTM) with subcellular resolution is useful. In this context, an in situ testing device was developed to determine the cellular response of wood to mechanical loading. Different rotationally symmetric specimens were tested to synchronize the failure areas to the given scanning areas. Norway spruce samples were uniaxially compressed in the longitudinal direction and scanned in situ at several increasing relative forces ending up in the plastic deformation regime. A suffi ciently high quality in situ tomography was demonstrated. The reconstructed data allowed the observation of the load-dependent development of failure regions: cracks and buckling on the microstructure were clearly visible. Future investigations with SbTM on different wood species, loading directions, and different moisture contents are promising in terms of the micromechanical behavior of wood.

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Section: Introductionmentioning

confidence: 99%

Synchrotron-based tomographic microscopy (SbTM) of wood: development of a testing device and observation of plastic deformation of uniaxially compressed Norway spruce samples

et al. 2012

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“…Results give evidence for the enormous potential for wood research in general and mycology in specific, though it should be remarked that although sub-micron resolution is obtained, resolution is lower even than conventional light microscopy. As illustrated by Trtik et al (2007), scanning with a resolution below 1 μm results in a volume of the internal structure of wood (Fig. 1) down to details at cell wall level.…”

Section: Discussionmentioning

confidence: 99%

Three-Dimensional X-Ray Imaging and Analysis of Fungi on and in Wood

et al. 2009

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As wood is prone to fungal degradation, fundamental research is necessary to increase our knowledge aiming at product improvement. Several imaging modalities are capable of visualizing fungi, but the X-ray equipment presented in this paper can envisage fungal mycelium in wood non-destructively in three dimensions with sub-micron resolution. Four types of wood subjected to the action of the white rot fungus Coriolus versicolor (Linnaeus) Quélet (CTB 863 A) were scanned using an X-ray based approach. Comparison of wood volumes before and after fungal exposure, segmented manually or semi-automatically, showed the presence of the fungal mass on and in the wood samples and therefore demonstrated the usefulness of computed X-ray tomography for mycological and wood research. Further improvements to the experimental set-up are necessary in order to resolve individual hyphae and enhance segmentation.2

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“…The reader interested in such results is referred to e.g. [30][31][32]. The measurements are performed at the TOMCAT beamline [33,34] at the Swiss Light Source (SLS), Paul Scherrer Institute, Villigen, Switzerland.…”

Section: Experimental Datamentioning

confidence: 99%

Estimation of affine transformations directly from tomographic projections in two and three dimensions

Mooser

Forsberg

Hack

et al. 2011

Machine Vision and Applications

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This paper presents a new approach to estimate two-and three-dimensional affine transformations from tomographic projections. Instead of estimating the deformation from the reconstructed data, we introduce a method which works directly in the projection domain, using parallel and fan beam projection geometries. We show that any affine deformation can be analytically compensated, and we develop an efficient multiscale estimation framework based on the normalized cross correlation. The accuracy of the approach is verified using simulated and experimental data, and we demonstrate that the new method needs less projection angles and has a much lower computational complexity as compared to approaches based on the standard reconstruction techniques.

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3D imaging of microstructure of spruce wood

Cited by 124 publications

References 37 publications

Synchrotron-based tomographic microscopy (SbTM) of wood: development of a testing device and observation of plastic deformation of uniaxially compressed Norway spruce samples

Synchrotron-based tomographic microscopy (SbTM) of wood: development of a testing device and observation of plastic deformation of uniaxially compressed Norway spruce samples

Three-Dimensional X-Ray Imaging and Analysis of Fungi on and in Wood

Estimation of affine transformations directly from tomographic projections in two and three dimensions

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