Do you know if it is possible to export the Desikan-Killiany atlas as a nii file from brainstorm?
The Desikan-Killiany atlas is generated in FreeSurfer as a surface parcellation.
A volume version is created during the recon-all segmentation pipeline, and then imported in the Brainstorm database as a volume parcellation.
To export this volume parcellation as a .nii file: right-click on the file in the subject anatomy > File > Export to file.
https://neuroimage.usc.edu/brainstorm/Tutorials/LabelFreeSurfer#Volume_parcellations