Abstract #3124
Observation of time-dependent transverse relaxation rate due to mesoscopic magnetic structure
Philipp Emerich 1 , Alexander Ruh 1 , Harald Scherer 2 , Dmitry S. Novikov 3 , and Valerij G. Kiselev 1
1
Dept. of Radiology, Medical Physics,
University Medical Center Freiburg, Freiburg, Germany,
2
Dept.
of Inorganic and Analytical Chemistry, University
Freiburg, Freiburg, Germany,
3
Bernard
and Irene Schwartz Center for Biomedical Imaging,
Department of Radiology, New York University School of
Medicine, New York, New York, United States
Transverse relaxation in biological tissues is sensitive
to the structural organization of magnetic
inhomogeneities on the cellular level. A recently
developed theory predicts a reflection of this
structural organization in the long-time behavior of the
induced relaxation rate as a power law approach to the
asymptote. We report the first experiment aimed at
verification of this theory in a model system of
microbeads suspended in aqueous solution of variable
magnetic susceptibility. Experimental results are in a
good agreement with theoretical predictions and Monte
Carlo simulations.
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