Artículo
Probing numerical Laplace inversion methods for two and three-site molecular exchange between interconnected pore structures
Fecha de publicación:
01/2018
Editorial:
Academic Press Inc Elsevier Science
Revista:
Journal Of Magnetic Resonance
ISSN:
1090-7807
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Two-dimension (2D) Nuclear Magnetic Resonance relaxometry experiments are a powerful tool extensively used to probe the interaction among different pore structures, mostly in inorganic systems. The analysis of the collected experimental data generally consists of a 2D numerical inversion of time-domain data where T2-T2 maps are generated. Through the years, different algorithms for the numerical inversion have been proposed. In this paper, two different algorithms for numerical inversion are tested and compared under different conditions of exchange dynamics; the method based on Butler–Reeds–Dawson (BRD) algorithm and the fast-iterative shrinkage-thresholding algorithm (FISTA) method. By constructing a theoretical model, the algorithms were tested for a two- and three-site porous media, varying the exchange rates parameters, the pore sizes and the signal to noise ratio. In order to test the methods under realistic experimental conditions, a challenging organic system was chosen. The molecular exchange rates of water confined in hierarchical porous polymeric networks were obtained, for a two- and three-site porous media. Data processed with the BRD method was found to be accurate only under certain conditions of the exchange parameters, while data processed with the FISTA method is precise for all the studied parameters, except when SNR conditions are extreme.
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(IFEG)
Articulos de INST.DE FISICA ENRIQUE GAVIOLA
Articulos de INST.DE FISICA ENRIQUE GAVIOLA
Citación
Silletta, Emilia Victoria; Franzoni, Maria Belen; Monti, Gustavo Alberto; Acosta, Rodolfo Héctor; Probing numerical Laplace inversion methods for two and three-site molecular exchange between interconnected pore structures; Academic Press Inc Elsevier Science; Journal Of Magnetic Resonance; 286; 1-2018; 82-90
Compartir
Altmétricas