Travel-time ultrasonic computed tomography applied to quantitative 2-D imaging of standing trees: a comparative numerical modeling study

Arciniegas Andres, Brancheriau Loïc, Gallet Philippe, Lasaygues Philippe. 2014. Travel-time ultrasonic computed tomography applied to quantitative 2-D imaging of standing trees: a comparative numerical modeling study. Acta Acustica United with Acustica, 100 (6) : 1013-1023.

Quartile : Q3, Sujet : ACOUSTICS

Résumé : The quality of the Ultrasonic Computed Tomography (UCT) imaging device, in term of spatial resolution, sensitivity or dynamic, is a function of the wavelength, the number of transducers, the ultrasonic field generated and the inversion algorithm. This latter factor was studied using four inversion techniques for the tomography of trees. Two new methods, Partial Least Squares method - PLS, and Layer Stripping - LS, are compared to two classical methods, Filtered Backprojection - FBP, and Simultaneous Iterative Reconstruction Technique - SIRT. An original numerical phantom of tree was used and the effects of the variation of the number of transducers and the noise level were analyzed. The PLS was found to converge slowly but reached a high performance for the reconstruction of the projection values (slowness). PLS method was also characterized by a fast computation time. However, the PLS method gave a poor image quality (high sensitivity to noise level and presence of outlier values). The main advantage of the LS method was its high robustness to the noise level. The computing time was however the weakest point of LS method. A combination of the two classic FBP-SIRT methods seemed the most suitable except for the computation time. However, an improvement of the convergence conditions of PLS method (very fast computing time; including also curved rays), with the use of SIRT method, would constitute a promising solution.

Mots-clés Agrovoc : Populus deltoides, arbre, bois, qualité, propriété mécanique, technique ultrason, technique analytique, testage non destructif, radiographie, modèle mathématique

Classification Agris : K50 - Technologie des produits forestiers
U30 - Méthodes de recherche
F50 - Anatomie et morphologie des plantes

Champ stratégique Cirad : Axe 2 (2014-2018) - Valorisation de la biomasse

Auteurs et affiliations

• Arciniegas Andres, CNRS (FRA)
• Brancheriau Loïc, CIRAD-PERSYST-UPR BioWooEB (FRA) ORCID: 0000-0002-9580-7696
• Gallet Philippe, CIRAD-PERSYST-UPR BioWooEB (FRA)
• Lasaygues Philippe, CNRS (FRA)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/574137/)

Métriques

[ Page générée et mise en cache le 2024-02-17 ]