The colours of concrete as seen by X-rays and neutrons

Roubin, Emmanuel; Andò, Edward; Roux, Stéphane

doi:10.1016/j.cemconcomp.2019.103336

Cited by 26 publications

(16 citation statements)

References 13 publications

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“…This toolkit provides tools to measure the deformation between two images/volumes. A robust registration tool based on the same-modality version of Tudisco, Jailin, et al (2017) is provided, as well as some cutting edge tools such as multi-modal registration that implements Roubin, Andò, & Roux (2019). A version of Global-DVC as per Mendoza, Neggers, Hild, & Roux (2019) is in the process of being developed.…”

Section: Discussionmentioning

confidence: 99%

spam: Software for Practical Analysis of Materials

Stamati¹,

Andò²,

Roubin³

et al. 2020

JOSS

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Section: Discussionmentioning

confidence: 99%

spam: Software for Practical Analysis of Materials

Stamati¹,

Andò²,

Roubin³

et al. 2020

JOSS

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120

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“…To this end a "multimodal registration" tool is used as first presented in Tudisco et al (2017) and subsequently developed in Roubin et al (2019). The inherent linearisation of the problem requires a good initial guess of the solution for registration to converge.…”

Section: Multimodal Registrationmentioning

confidence: 99%

Dynamics of Water Absorption in Callovo-Oxfordian Claystone Revealed With Multimodal X-Ray and Neutron Tomography

et al. 2020

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The Callovo-Oxfordian claystone is a material with notoriously complex hydro-mechanical behaviour. Combined neutron and x-ray tomography modalities are used for the first time to characterise the dynamics of water absorption in this material by comparing material deformation as well as water arrival. Exploiting recent work on multimodal registration, neutron, and x-ray datasets are registered pairwise into a common coordinate system, meaning that a vector-valued field (i.e., neutron and x-ray reconstructed values) is available for each timestep, essentially making this a 5D dataset. The ability to cross-plot each field into a joint histogram (an inherent input into the registration) allows an improved identification of mineral phases in this complex material. Material deformation obtained from the application of Digital Volume Correlation on the x-ray timeseries data is locally compared to changes in water content available from the neutrons, opening the way toward a quantitative description of the hydro-mechanics of this process.

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“…Neutron tomography has recently been shown to be a promising alternative technique to X-ray tomography for the evaluation of bone tissue in close proximity to a metallic implant (Isaksson et al, 2017;Le Cann et al, 2017;Guillaume et al, 2021;Törnquist et al, 2021). Neutrons interact differently with matter compared to X-rays, which translates into an alternative contrast between materials, that is, not correlated with X-ray attenuation values (Bilheux et al, 2009;Roubin et al, 2019;Tengattini et al, 2021). Since most metals used for medical implants (e.g., steel and titanium) are rather transparent when imaged with neutrons, no adverse effects on image quality are seen at the bone-implant interface (Isaksson et al, 2017) (Figure 1B).…”

Section: Introductionmentioning

confidence: 99%

The Hydration State of Bone Tissue Affects Contrast in Neutron Tomographic Images

Törnquist

Cann

Tengattini

et al. 2022

Front. Bioeng. Biotechnol.

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Neutron tomography has emerged as a promising imaging technique for specific applications in bone research. Neutrons have a strong interaction with hydrogen, which is abundant in biological tissues, and they can penetrate through dense materials such as metallic implants. However, in addition to long imaging times, two factors have led to challenges in running in situ mechanical characterization experiments on bone tissue using neutron tomography: 1) the high water content in specimens reduces the visibility of internal trabecular structures; 2) the mechanical properties of bone are dependent on the hydration state of the tissue, with drying being reported to cause increased stiffness and brittleness. This study investigates the possibility of improving image quality in terms of neutron transmission and contrast between material phases by drying and rehydrating in heavy water. Rat tibiae and trabecular bovine bone plugs were imaged with neutron tomography at different hydration states and mechanical testing of the bone plugs was carried out to assess effects of drying and rehydration on the mechanical properties of bone. From analysis of image histograms, it was found that drying reduced the contrast between bone and soft tissue, but the contrast was restored with rehydration. Contrast-to-noise ratios and line profiles revealed that the contrast between bone tissue and background was reduced with increasing rehydration duration but remained sufficient for identifying internal structures as long as no free liquid was present inside the specimen. The mechanical analysis indicated that the proposed fluid exchange protocol had no adverse effects on the mechanical properties.

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The colours of concrete as seen by X-rays and neutrons

Cited by 26 publications

References 13 publications

spam: Software for Practical Analysis of Materials

spam: Software for Practical Analysis of Materials

Dynamics of Water Absorption in Callovo-Oxfordian Claystone Revealed With Multimodal X-Ray and Neutron Tomography

The Hydration State of Bone Tissue Affects Contrast in Neutron Tomographic Images

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