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Diffusion MRI-Based Cytoarchitecture Measurements in Brain Gray Matter using Likelihood-Free Inference

Abstract : We propose a new method to solve the inverse problem of relating the diffusion MRI signal with cytoarchitectural characteristics in brain gray matter. Specifically, our method has quantitative sensitivity to soma density and volume. Our solution is twofold. First, we propose a new forward model that relates summary statistics of the dMRI signal with tissue parameters, relying on six b-shells only. We then apply a likelihood-free inference based algorithm to invert the proposed model, which not only estimates the tissue parameters that best describe the acquired diffusion signal, but also a full posterior distribution over the parameter space.
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https://hal.inria.fr/hal-03156307
Contributor : Maëliss Jallais Connect in order to contact the contributor
Submitted on : Tuesday, March 2, 2021 - 1:41:02 PM
Last modification on : Thursday, February 3, 2022 - 3:09:00 AM
Long-term archiving on: : Monday, May 31, 2021 - 6:49:05 PM

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  • HAL Id : hal-03156307, version 1

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Maëliss Jallais, Pedro Rodrigues, Alexandre Gramfort, Demian Wassermann. Diffusion MRI-Based Cytoarchitecture Measurements in Brain Gray Matter using Likelihood-Free Inference. ISMRM 2021 - Annual Meeting of the International Society for Magnetic Resonance in Medicine, May 2021, Vancouver / Virtual, Canada. ⟨hal-03156307⟩

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