Table 1. .
Summary of structural network weights
| Short name | Long name | Method | Data source | Interpretation |
|---|---|---|---|---|
| LoS | Length of streamlines | Streamline-specific | Diffusion MRI | Mean length of the streamlines connecting two nodes |
| NoS | Number of streamlines | Streamline-specific | Diffusion MRI | Number of streamlines connecting two nodes; connection strength |
| SIFT2 | Spherical-deconvolution informed filtering of tractograms | Streamline-specific | Diffusion MRI | Fiber density from spherical deconvolution summed across streamlines; connection strength |
| COMMIT | Convex optimization modeling for microstructure informed tractography | Streamline-specific | Diffusion MRI | Total intra-axonal cross-sectional area summed across streamlines; connection strength |
| R1 | Longitudinal relaxation rate | Tractometry | Multimodal MRI (diffusion + relaxometry) | R1 = 1/T1; index of tissue myelin content |
| FA | Fractional anisotropy | Tractometry | Diffusion MRI | Diffusion directional dependence |
| RD | Radial diffusivity | Tractometry | Diffusion MRI | Diffusion perpendicular to the principal axis |
| ICVF | Intracellular volume fraction | Tractometry | Diffusion MRI | Neurite density |