Chris,

The ?.volume files are somewhat misleading in name in that they are not MRI volumes in the traditional sense. Rather, it is the cortical volume at a surface vertex, as calculated by multiplying area by thickness. Doing so requires a new utility called mris_calc, which will be in the next release, and is posted here for Linux:

ftp://surfer.nmr.mgh.harvard.edu/transfer/outgoing/fsdev/nicks/stable/centos4

To create the lh.volume file, run this:

mris_calc -o lh.area.mid lh.area add lh.area.pial mris_calc -o lh.area.mid lh.area.mid div 2 mris_calc -o lh.volume lh.area.mid mul lh.thickness

This will be performed in the next release of recon-all during the - finalsurfs stage.

Nick

On Wed, 2008-01-23 at 10:53 -0600, bell0368@umn.edu wrote:

Freesurfers,

The wiki mentions one of the "known issues" with the current release is that recon-all does not create ?h.volume files. I have been using the following command to create what appear to be volume files for cortical and wm parcellations. Is the problem just that these files are not created automatically?

mri_extract_label aparc+aseg.mgz (number corresponding to the desired label) (name of the output label/volume file)

Chris Bell _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer