title: Translational free random walk of spins in the presence of a parabolic magnetic field.
abstract: The free random walk approach has been used to analyze the attenuation of the NMR signal due to spin dephasing in the presence of a constant and pulsed parabolic magnetic field. The spin echo sequence was chosen to examine the attenuation of the NMR signal resulting from self-diffusion. In the framework of the gaussian approach, the long-time limit calculations predict more pronounced diffusion weighting for the parabolic field than for linear magnetic field. Analytical results were obtained and compared with those from other approaches based on a variety of different of approximations.
authors.affiliation: Institut für Medizin, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany.
authors.forename: Oleg
authors.initials: O
authors.lastname: Posnansky
authors.forename: Ruiwang
authors.initials: R
authors.lastname: Huang
authors.forename: N Jon
authors.initials: NJ
authors.lastname: Shah
mesh_terms: D004574:Electromagnetic Fields; D009682:Magnetic Resonance Spectroscopy; D008958:Models, Molecular; D015233:Models, Statistical; D012815:Signal Processing, Computer-Assisted