Non-destructive tree-ring measurements using a clinical 3T-MRI for archaeology

Mori, Mika; Kuhara, Shigehide; Kobayashi, Kuninori; Suzuki, Sinya; Yamada, Masahisa; Senoo, Atsushi

doi:10.1016/j.dendro.2019.125630

Cited by 17 publications

(12 citation statements)

References 18 publications

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“…Non-invasive methods based on X-ray images have recently been developed allowing non-invasive recognition by microscopic examination of at least three rings. [7] However, the latter method seems to fail in the case of waterlogged wood, due to the excessive water content which attenuates the contrast obtained with X-ray imaging of the different wooden structures soaked in water. [7] Another useful property of NMR imaging is of being able to monitor chemical-physical processes in a noninvasive way.…”

Section: Introductionmentioning

confidence: 99%

“…[7] However, the latter method seems to fail in the case of waterlogged wood, due to the excessive water content which attenuates the contrast obtained with X-ray imaging of the different wooden structures soaked in water. [7] Another useful property of NMR imaging is of being able to monitor chemical-physical processes in a noninvasive way. MRI may monitor both consolidation and extraction procedures (with consequent identification of extracted elements) of waterlogged archaeological wood.…”

Section: Introductionmentioning

confidence: 99%

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High‐resolution multiparametric MRI of contemporary and waterlogged archaeological wood

Capuani

Stagno

Missori

et al. 2020

Magnetic Reson in Chemistry

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High‐resolution NMR images on three different present‐day wood samples and an archaeological wood specimen were presented and discussed. Although the spatial resolution is still low to perform dendrology for the exact identification of the wooden species, the T2‐spin‐density weighted images exhibit contrasts that are in excellent agreement with optical histological images. On the other hand, T2* and T1‐weighted images provide physiological information that is not obtainable by the usual light microscopic investigations. Moreover, the diffusion‐weighted images show the anisotropic behaviour of the water diffusion coefficient quantified along and perpendicularly to vascular bundles (vessels and tracheids), which can be related to the morphology and size of wooden microstructure. This work suggests that high‐resolution multiparametric MRI may be a useful tool to increase the information obtainable from the waterlogged archaeological wood remains in a completely non‐invasive and non‐destructive approach. Therefore, it would be desirable to further develop the hardware and functional characteristics of MRI scanners to improve their potential application in the field of wooden cultural heritage.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

High‐resolution multiparametric MRI of contemporary and waterlogged archaeological wood

Capuani

Stagno

Missori

et al. 2020

Magnetic Reson in Chemistry

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“…The contrast between the less-dense earlywood bands and the dense latewood bands is very high for all dry samples (Figures 1a and 1b), however, increasing the moisture content of the samples significantly reduced this contrast. Interestingly, unlike other imaging techniques such as X-ray computed tomography (XCT) or clinical magnetic resonance imaging (MRI), here the rings are still distinguishable in both dry and wet conditions [18]. Quantitative analysis revealed that the increase of moisture content in these samples increased their attenuation coefficient ( [19].…”

Section: Resultsmentioning

confidence: 83%

Using Thermal Neutron Imaging in Forest Products Research

Plaza

Ibach

Hasburgh

et al. 2020

The 1st International Electronic Conference on Forests—Forests for a Better Future: Sustainability, Innovation, Inter

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Neutron imaging is a non-destructive evaluation technique with enhanced hydrogen sensitivity that allows researchers to monitor water content and transport in materials. In lignocellulosic research, this technique has typically been used to measure changes in moisture content, water transport and even local changes in the density of wood. Yet, studies looking into the combined effects of moisture-uptake, chemical modifications and thermal degradation are still lacking. This is perhaps due to the inherent limited availability of these instruments and their lesser spatial resolution compared to x-ray imaging. While recent advances in detector technology and neutron production have led to continued improvements in both instrument availability and spatial resolution, the technique remains underutilized in forests products research. Here, we used thermal neutron imaging to measure differences in the attenuation of the neutron beam due to acetylation in both solid wood samples and wood-plastic composite samples, as well as a thermally degraded wood sample. Our results show that moisture plays a key role in the contrast. Moreover, we showed that the attenuation coefficient is particularly sensitive to changes in density and/or local hydrogen content caused by thermal degradation of the wood polymers.

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“…Известны попытки применения современных физических методов для пространственного картирования свойств дерева, в частности, методами рассеяния синхротронного излучения [7], 3D рентгеновской компьютерной [46][47][48][49] и магниторезонансной томографии [50]. Однако эти методы сложны в реализации, трудоемки и требуют дорогостоящего или уникального оборудования, поэтому они применяются редко.…”

Section: Introductionunclassified

Локальные Механические Свойства И Кольцевая Структура Древесины, Исследованные Методом Сканирующего Наноиндентирования

Головин¹,

Тюрин²,

Гусев³

et al. 2022

Журнал Технической Физики

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The paper presents the results of scanning of mechanical properties of coniferous (common pine Pinus sylvestris) and deciduous (small-leaved lime Tilia cordata and common oak Quercus robur) trees wood using nanoindentation on crosscut face. Manifold increase in microhardness H and Young’s modulus E has been observed between early and late wood in every annual growth ring. Significant differences in intraring radial dependencies of H and E have been found among studied species. For all studied species the average values of E and H of early wood in each annual ring are found to be independent from ring width, while such dependence for late wood is weak at most. The ring widths measured by nanoindentation coincide with the ones measured by standard optical method within 2-3%. The developed technique and obtained results can be useful 1) to amend the understanding the origins of macromechanical properties of various wood species and their dependence upon microstructural characteristics and growth conditions, 2) to optimize the technologies of growing, reinforcement and subsequent usage of the wood, 3) to develop new independent high resolution methods in dendrochronology.

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Non-destructive tree-ring measurements using a clinical 3T-MRI for archaeology

Cited by 17 publications

References 18 publications

High‐resolution multiparametric MRI of contemporary and waterlogged archaeological wood

High‐resolution multiparametric MRI of contemporary and waterlogged archaeological wood

Using Thermal Neutron Imaging in Forest Products Research

Локальные Механические Свойства И Кольцевая Структура Древесины, Исследованные Методом Сканирующего Наноиндентирования

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