How to use multiple compartment models (MCM) on dw-MRI?

Hi everyone,

Recently I read an article about extract microglia information from diffusion MRI (dwi) named as “Mapping microglia and astrocyte activation in vivo using diffusion MRI”. However, the authors did not provide the software but a model and expression.

I’m wondering if anyone here knows what software functions for MCM to do similar things? I would greatly appreciate any advice or resources. Thank you in advance!