Export Data

Use --action=exp to export voxelwise metrics from FIB files or convert tractography between TT and TRK formats.

Export Metrics from FIB Files

Export selected metrics from one FIB file:

dsi_studio --action=exp --source=subject.fz --export=dti_fa,ad,md

Export QA and ISO from all FIB files and transform the exported images to MNI space:

dsi_studio --action=exp --source=*.fz --export=qa,iso --export_to_mni

Parameter	Description
--source	Input .fz or legacy .fib.gz file. Wildcards can be used for batch processing.
--export	Comma-separated metric names to export, such as qa,iso,dti_fa,ad,md. Each metric is saved as <source>.<metric>.nii.gz.
--export_to_mni	Transform exported images to MNI space.

Convert Tractography Files

Convert TRK to TT:

dsi_studio --action=exp --source=af.trk.gz --output=af.tt.gz

Convert TT to TRK:

dsi_studio --action=exp --source=af.tt.gz --output=af.trk.gz

The conversion direction is determined by the input and output suffixes. --action=exp accepts .trk.gz → .tt.gz and .tt.gz → .trk.gz conversion.

Demographic-Matched Image Export

For a FIB-format connectometry database that includes demographics, --match can create a demographics-matched image:

dsi_studio --action=exp --source=database.fz --match=criteria.txt --output=matched_image.nii.gz

This function requires connectometry database data and demographics stored in the input file. If --output is omitted, DSI Studio uses <source>.matched.nii.gz.