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Abstract #4125

Investigating the biomechanical properties of the aging mouse brain using an elastographic atlas

Biru Huang1, Rafaela Vieira da Silva2, Tom Meyer3, Yasmine Safraou3, Anna Morr3, Carmen Infante-Duarte2, Jürgen Braun4, Ingolf Sack3, and Jing Guo3
1Department of Radiology, Charité - Universitätsmedizin Berlin, Berlin, Germany, 2Institute for Medical Immunology, Charité – Universitätsmedizin Berlin, Berlin, Germany, 3Berlin Institute of Health, Charité - Universitätsmedizin Berlin, Berlin, Germany, 4Institute of Medical Informatics, Charité – Universitätsmedizin Berlin, Berlin, Germany

Synopsis

Keywords: Biology, Models, Methods, Aging, elastography

Motivation: The biomechanical signature of the aging brain and its correlation with the underlying microstructure, is poorly understood.

Goal(s): To systematically analyze the global and regional biomechanical properties of the brain during aging.

Approach: We investigated the in vivo biomechanical progression of the female mouse brain over an age range of 6 to 18 months using multifrequency MR elastography.

Results: Highly resolved elastographic atlases of the mouse brain at different ages were generated. Global and regional analysis revealed softening and reduced viscosity as dominating patters of biomechanical changes related to the structural variations of the aging brain.

Impact: This study demonstrated the use of MR elastography to track the biomechanical changes in the brains of aging healthy mice. Our study revealed softening and increased viscosity as biomechanical signature of the aging brain.

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