Transverse NMR relaxation in magnetically heterogeneous media

Details Transverse NMR relaxation in magnetically heterogeneous media Transverse NMR relaxation in magnetically heterogeneous media

2008-01-30

arxiv.org/abs/0801.4765v2

J. Magn. Reson. 195, 33 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

9 pages, 4 figures

Scientific paper

10.1016/j.jmr.2008.08.005

We consider the NMR signal from a permeable medium with a heterogeneous Larmor frequency component that varies on a scale comparable to the spin-carrier diffusion length. We focus on the mesoscopic part of the transverse relaxation, that occurs due to dispersion of precession phases of spins accumulated during diffusive motion. By relating the spectral lineshape to correlation functions of the spatially varying Larmor frequency, we demonstrate how the correlation length and the variance of the Larmor frequency distribution can be determined from the NMR spectrum. We corroborate our results by numerical simulations, and apply them to quantify human blood spectra.

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