Hi Nicolas,
If you used Christian's vbm2 toolbox for the segmentation, then it
should have written a text file called vbm_volumes.txt -- in the
directory that you were running SPM2/VBM2 at the time (i.e. not
necessarily the directory with the images).
The function cg_read_volumes just picks out the values from this file,
so if you didn't use the vbm2's optimised segmentation, or if you've
since lost this file, then it won't help.
Does my function here
http://www.jiscmail.ac.uk/cgi-bin/wa.exe?A2=ind0609&L=SPM&P=27629
return sensible-looking answers?
You should either run on native, or on unsmoothed modulated-normalised
data. Smoothing probably shouldn't change the results much though, as
I think the kernel is normalised to have unit volume.
Hope this helps,
Ged.
Nicolas Cherbuin wrote:
> Sorry this is probably a question that has been answered before but I
> searched the list and the web and the help file and could not find
> enough info.
>
>
>
> I am doing VBM with SPM2 and I am trying to compute and easily compile a
> list of GM, WM, and CSF. I thought I could do it with Christian Gaser
> vbm2 toolbox but I have to enter a file name “vbm*txt” which I cannot
> find in my data (I have also used vbm2 to create a template and to
> segment and modulate my scans).
>
>
>
> Could you please tell me an easy way of compiling this data?
>
>
>
> Thanks
>
>
>
> Nic
>
>
>
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