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Abstract #3455

GEM: a unifying model for Gray Matter microstructure

Quentin Uhl1,2, Tommaso Pavan1,2, Inès de Riedmatten1,2, Jasmine Nguyen-Duc1,2, and Ileana Jelescu1,2
1Department of Radiology, CHUV, Lausanne, Switzerland, 2UNIL, Lausanne, Switzerland

Synopsis

Keywords: Microstructure, Diffusion/other diffusion imaging techniques, Diffusion modeling, Tissue characterization, Soma, Exchange

Motivation: Gray Matter lacks a unified microstructure model, unlike White Matter. This study introduces the Generalized Exchange Model (GEM) to unify Gray Matter models, introducing exchange with simple structures.

Goal(s): Evaluate GEM performance, compare it with other Gray Matter models, and assess its potential for clinical MRI.

Approach: GEM parameters and equations are detailed and validated with simulated data. GEM is applied on clinical MRI data, and compared to other Gray Matter model estimates.

Results: GEM successfully unifies Gray Matter diffusion models, offering plausible estimations in clinical MRI revealing microstructural patterns. Future research will optimize data acquisition and assess accuracy.

Impact: The introduction of the Generalized Exchange Model holds significant implications. For scientists, it provides a unified framework, potentially simplifying and enhancing Gray Matter modeling, promoting consistency in research. Clinicians may benefit from improved specificity in diagnosing neurological conditions.

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Keywords