Abstract #3935

MR Measurements of Anomalous Diffusion Indices α & γ by Means of PGSTE Techniques at Varying of Time & of Gradient Strength in Phantoms

Marco Palombo¹, Andrea Gabrielli², Silvia De Santis¹, Silvia Capuani^1,3

¹Physics Department, Sapienza University of Rome, Rome, Italy; ²ISC, CNR, Rome, Italy; ³IPCF UOS Roma, CNR, Rome, Italy

This work introduces a novel method to give more insides on anomalous diffusion processes of water in heterogeneous systems, by means of PGSTE techniques. When a competition between subdiffusive and superdiffusive processes occurs, it is possible to introduce a pseudo-RMS≈t^α/γ for which α/γ grater or smaller than 1 defines superdiffusion and subdiffusion processes respectively. Experimental data obtained in micro-beads water suspension samples, demonstrate that α and γ reflect some additional microstructural information which cannot be obtained using conventional diffusion procedures based on Gaussian diffusion. Specifically, α can provide information on the degree of order and/or disorder within the investigated systems.