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Analysis of discrete T 2 components of NMR relaxation for aqueous solutions in hollow fiber capillaries
Author(s) -
Bronskill Michael J.,
Santyr Giles E.,
Walters Blake,
Henkelman R. Mark
Publication year - 1994
Publication title -
magnetic resonance in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.696
H-Index - 225
eISSN - 1522-2594
pISSN - 0740-3194
DOI - 10.1002/mrm.1910310606
Subject(s) - relaxation (psychology) , aqueous solution , diffusion , fiber , nuclear magnetic resonance , chemistry , proton , spin–spin relaxation , compartment (ship) , analytical chemistry (journal) , spin–lattice relaxation , thermodynamics , physics , chromatography , nuclear physics , organic chemistry , psychology , social psychology , oceanography , geology
An analysis is presented of proton NMR T 2 relaxation times measured for aqueous solutions In simple bundles of hollow fibers. The relaxation times are calculated with a two‐compartment diffusive exchange model using the known relaxation times of the aqueous solutions and the fiber geometry. When the relaxation time outside the fibers is short (∼1 ms), three or more relaxation components are observed from this two compartment system, in agreement with the calculation. The amplitude and relaxation times of the third component are consistent with those of a diffusion‐mediated mode, as suggested theoretically by Brownstein and Tarr ( Phys. Rev. A 19, 2446 (1979)). The possible contribution of such modes to the multicomponent relaxation observed in tissues is discussed.