Abstract #3123
Characterization of Intrinsic Susceptibility Gradients Using R 1 Dispersion
John Thomas Spear 1,2 and John C. Gore 2,3
1
Physics & Astronomy, Vanderbilt University,
Nashville, TN, United States,
2
Institute
of Imaging Science, Vanderbilt University, Nashville,
TN, United States,
3
Biomedical
Engineering, Vanderbilt University, Nashville, TN,
United States
Diffusion of water through susceptibility gradients
causes R
1
dispersion
to a degree that depends on the geometry and size of the
inhomogeneities responsible for the gradients. Finite
difference simulations were run and compared to
experimental data to further substantiate a method to
quantify the spatial scales of packed inhomogeneities
that has been presented in the literature. R
1
dispersions
were simulated for spherical and cylindrical structures
with varying radii and volume fractions to estimate the
correlation time, a parameter that estimates the scale
of the gradients.
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