isDiagnosticBiomarkerFor isMonitoringBiomarkerFor isImagingBiomarkerFor isBiomarkerOfAging metric axonal water fraction generated with ChatGPT version 3,5 on 07.05.2024 Axonal water fraction (AWF) is a metric used in diffusion MRI (dMRI) to characterize the microstructural properties of white matter in the brain. It quantifies the proportion of water molecules associated specifically with the axonal compartments within white matter tissue. disease