Download only essential FreeSurfer v6 fsaverage files for quick visualization.

Download a minimal subset of files from the FreeSurfer v6 fsaverage subject, containing only the white surfaces, cortex labels, and curvature files needed for basic 3D visualization (e.g., in a Shiny app). This is much faster than download_fsaverage which downloads 19 files. The files are subject to the FreeSurfer software license, see parameter 'accept_freesurfer_license' for details.

Usage

download_fsaverage_minimal(accept_freesurfer_license = FALSE, scheme = "https")

Arguments

accept_freesurfer_license: logical, whether you accept the FreeSurfer license for fsaverage, available at https://surfer.nmr.mgh.harvard.edu/fswiki/FreeSurferSoftwareLicense. Defaults to FALSE.
scheme: character string, the URL scheme to use. Either "https" (the default) or "http". Switching to "http" can be useful as a fallback if the HTTPS server is unreachable.

Value

Named list. The list has entries: "available": vector of strings. The names of the files that are available in the local file cache. You can access them using get_optional_data_file(). "missing": vector of strings. The names of the files that this function was unable to retrieve.

Note

This downloads approximately 8 files instead of the 19 downloaded by download_fsaverage, making it suitable for environments with startup time constraints (e.g., Posit Connect Cloud, shinyapps.io).