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Abstract #3931

Mechanical Stiffness and Anisotropy Measured by MR Elastography during Brain Development in the Minipig

Shuaihu Wang1, Charlotte A Guertler1, Ruth J Okamoto1, Curtis L Johnson2, Matthew DJ McGarry3, and Philip V Bayly1
1Washington University in St. Louis, St. Louis, MO, United States, 2University of Delaware, Newark, DE, United States, 3Dartmouth College, Hanover, NH, United States

Synopsis

Keywords: Elastography, Tissue CharacterizationThe relationship between brain development and mechanical properties of brain tissue is important but remains incompletely understood. Here we use data from magnetic resonance elastography (MRE) and diffusion tensor imaging (DTI) to estimate anisotropic mechanical properties in six female Yucatan minipigs at ages from 3 to 6 months with a transversely- isotropic nonlinear inversion (TI-NLI) algorithm. Our results show that white matter is more dissipative and anisotropic than gray matter, and reveal effects of brain development on brain stiffness and structural anisotropy. Changes in brain mechanical properties may be a fundamental biophysical signature of brain development.

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Keywords