title: Intermolecular double-quantum NMR techniques to probe microstructures on porous media.
abstract: In heterogeneous systems the amplitude of the intermolecular double-quantum (DQ) signal depends on sample heterogeneity over a correlation distance dc=pi/(gammaGct). In this paper two different CRAZED-type sequences were applied in a porous medium phantom. One of these sequences gives rise to a DQ-T2 weighted signal, while the other one gives rise to a DQ-T2* weighted signal. Experimental results indicate that tuning of the correlation distance dc in a porous medium can alter the DQ signal in a manner which depends on the microstructure. This is evident only using the CRAZED-type sequence which gives rise to a DQ-T2* weighted signal.
authors.affiliation: Physics Department 'La Sapienza' University, and INFM UdR Roma1, P.le A. Moro 5, 00185 Rome, Italy.
authors.forename: S
authors.initials: S
authors.lastname: Capuani
authors.forename: R T
authors.initials: RT
authors.lastname: Branca
authors.forename: M
authors.initials: M
authors.lastname: Alesiani
authors.forename: B
authors.initials: B
authors.lastname: Maraviglia
mesh_terms: D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D019047:Phantoms, Imaging; D016062:Porosity