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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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