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"Finite-Difference Approach for the High-Precision
Analysis of Rotating-Frame Diffusion Images"
K. Woelk, B. L. J. Zwank, P. Trautner,
E. Lehnhof, J. Bargon, R.
J. Klingler, R. E. Gerald II, and J. W. Rathke, J. Magn. Reson.
145,
276-290 (2000).
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A finite-difference approach has been developed for precisely determining
diffusion coefficient and T1 relaxation time in fluid samples analyzed
by magnetization-grating rotating-frame imaging (MAGROFI) with either a
surface coil or a toroid cavity detector
(TCD).
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This approach avoids shortcomings of phenomenologically based approximations,
such as neglect of sample geometries with singularities at the confines
of the sample volume, and accounts for the diffusive edge enhancement observed
in fluid imaging. Error limits are discussed.
-
The new method has been applied to the determination of the self-diffusion
coefficient for MAGROFI experiments using TCDs filled with acetone.
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K. Woelk, September
25, 2000