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Abstract #1667

Time-dependent transverse relaxation reveals statistics of structural organization in microbead samples

Alexander Ruh 1 , Philipp Emerich 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, NY, 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. Here we present the first direct experimental verification of such dependence in differently composed media. Specifically, we observe the theoretically expected behavior in a microbead phantom with two different types of structural disorder.

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