Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2019 Jan;14(1):114–123. doi: 10.4103/1673-5374.243716

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

Copyright: © Neural Regeneration Research

This is an open access journal, and articles are distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 License, which allows others to remix, tweak, and build upon the work non-commercially, as long as appropriate credit is given and the new creations are licensed under the identical terms.

PMC Copyright notice

Visualization of diffusion compartments in the NODDI model.

V_iso and V_ic are the volume fraction of the free isotropic diffusion and intra-axonal compartment, respectively. The extracellular volume fraction is V_ec = (1 – V_ic), a complement number to V_ic. A_iso, A_ic, and A_ec are the normalized diffusion signal contributed from individual diffusion compartments. A_ec: Diffusion signal from extra-axonal water; A_ic: diffusion signal from intra-axonal water; A_iso: diffusion signal from isotropic fast diffusion; NODDI: neurite orientation dispersion and density imaging; V_ec: volume fraction for extra-cellular water; V_ic: volume fraction for intra-axonal water; V_iso: volume fraction for isotropic fast diffusion; CSF: cerebrospinal fluid.