At this point I have a bfloat volume, that I loaded in tkmedit, and a .label file that contains the resulting ROI. How do I obtain the volume from that?

Thanks, George P.

On Tue, 28 Sep 2004, Brian T. Quinn wrote:

mri_label_volume -s <subject_name> -l <logfile> <segdir> <labelvalue(s)> will output to the logfile the volumes for each of the labelvalue(s) you list.

example: mri_label_volume -s s126 -l s126hipps.log $SUBJECTS_DIR/s126/mri/aseg 17 53

will output the hippocampal volumes for subject s126.

-- brian t. quinn

On Tue, 28 Sep 2004, George Papadimitriou wrote:

...

Hi all,

How can I compute the volume of a label created using tkmedit? Is there a program to do this, or is it sufficient to count the number of points listed in the label file and multiply by the volume per voxel? (And if so, is the volume per voxel the voxel size for my original 40 slice axial volume, or the voxel size for the 256 slice resampled volume that tkmedit displays?)

Thanks, George P. _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer

Hi Ray,

we do indeed have full subcortical labeling (see Neuron, 2002 paper), but aren't able to distribute it yet. We will do so when able to, hopefully sometime in the next year.

cheers, Bruce

On Wed, 29 Sep 2004, Ray Fix wrote:

Hello Brian,

I found this email fascinating because I didn't know FS had the ability to measure hippocampal volumes.

Naively, I tried your suggestion, but found that the mri/aseg directory doesn't exist. How is that normally created?

At this point I am using a somewhat archaic (year old ... but stable) version of FS so that might be the problem.

Any hints you can give would be greatly appreciated.

Best regards, Ray Fix

On Sep 28, 2004, at 3:57 PM, Brian T. Quinn wrote:

...

mri_label_volume -s <subject_name> -l <logfile> <segdir> <labelvalue(s)> will output to the logfile the volumes for each of the labelvalue(s) you list.

example: mri_label_volume -s s126 -l s126hipps.log $SUBJECTS_DIR/s126/mri/aseg 17 53

will output the hippocampal volumes for subject s126.

-- brian t. quinn

On Tue, 28 Sep 2004, George Papadimitriou wrote:

...

Hi all,

How can I compute the volume of a label created using tkmedit? Is there a program to do this, or is it sufficient to count the number of points listed in the label file and multiply by the volume per voxel? (And if so, is the volume per voxel the voxel size for my original 40 slice axial volume, or the voxel size for the 256 slice resampled volume that tkmedit displays?)

Thanks, George P. _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer

---

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

---

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