eprintid: 365 rev_number: 5 eprint_status: archive userid: 5 dir: disk0/00/00/03/65 datestamp: 2011-07-25 lastmod: 2013-06-28 12:16:21 status_changed: 2013-06-28 12:16:21 type: techreport metadata_visibility: show item_issues_count: 0 creators_name: Donelli, Massimo creators_name: Benedetti, Manuel creators_name: Rocca, Paolo creators_name: Pastorino, Matteo creators_name: Massa, Andrea title: Improving the Reconstruction Accuracy of Gas-Based NDE/NDT Methods Through a Level Set Approach ispublished: pub subjects: TU full_text_status: public keywords: NDE/NDT, Microwave Imaging, Genetic Algorithms, Level-Set abstract: In the framework of nondestructive testing and evaluation (NDE/NDT), this paper deals with the problem of the detection of unknown anomalies in dielectric materials. The proposed inverse scattering approach consists of a two-step procedure aimed at firstly estimating the region-of-interest where the defect is supposed to be located and then improving the qualitative imaging (i.e., the shape and position) of the crack. In order to assess the effectiveness of the proposed approach, an illustrative result from representative numerical test cases is presented and discussed. date: 2011-01 date_type: published institution: University of Trento department: informaticat refereed: FALSE referencetext: [1] J. C. Bolomey, “Recent European developments in active microwave imaging for industrial, scientific and medical applications,” IEEE Trans. Microwave Theory Tech., vol. 37, pp. 2109–2117, June 1989. [2] R. Zoughi, Microwave Nondestructive Testing and Evaluation. The Netherlands: Kluwer Academic, 2000. st [3] K. Meyer, K. J. Langenberg, and R. Schneider, “Microwave imaging of defects in solids,” in Proc. 21 Annual Review of Progress in Quantitative NDE, Snowmass Village, CO, July 31-Aug. 5 1994. [4] S. Caorsi, A. Massa, and M. Pastorino, “A crack identification microwave procedure based on a genetic algorithm for nondestructive testing,” IEEE Trans. Antennas Propagat. Magazine, vol. 37, pp. 7-15, 1995. [5] S. Caorsi, A. Massa, M. Pastorino, and M. Donelli, “Improved microwave imaging procedure for nondestructive evaluations of two-dimensional structures,” IEEE Trans. Antennas Propagat., Vol. 52, pp. 1386-1397, Jun. 2004. [6] Y. Rahmat Samii and E. Michielssen, Electromagnetic Optimization by Genetic Algorithms. New York: Wiley 1999. [7] O. Dorn and D. Lesselier, “Level set methods for inverse scattering”, Inverse Problems, 22, 2006, pp. R67-R131. [8] S. Caorsi, G. L. Gragnani, M. Pastorino, and M. Rebagliati, “A model-driven approach to microwave diagnostics in biomedical applications,” IEEE Trans. Microwave Theory Tech., vol. 44, pp. 1910-1920, 1996. [9] J. H. Richmond, “Scattering by a dielectric cylinder of arbitrary cross-section shape,” IEEE Trans. Antennas Propagat., vol. AP-13, pp. 334-341, 1965. [10] A. Litman, D. Lesselier, and F. Santosa, “Reconstruction of a two-dimensional binary obstacle by controlled evolution of a level-set,” Inverse Problem, Vol. 14, pp. 685-706, 1998. [11] S. Osher and J. A. Sethian “Fronts propagating with curvature-dependent speed: algorithms based on Hamilton–Jacobi formulations,” J. Comput. Phys. 79, pp. 12–49, 1988. citation: Donelli, Massimo and Benedetti, Manuel and Rocca, Paolo and Pastorino, Matteo and Massa, Andrea (2011) Improving the Reconstruction Accuracy of Gas-Based NDE/NDT Methods Through a Level Set Approach. [Technical Report] document_url: http://www.eledia.org/students-reports/365/1/DISI-11-223.C142.pdf