Dear SPM experts,
Even after reading the related posts on this list I am wondering if I am
correctly computing an scalar grey matter volume in a particular ROI. First
of all, is there any difference between GM volume and GM density?
Here is my pseudocode approach to compute the GM volume for each processed
scan (smwc1) in MNI space:
gmfile = read ('smwc1XXX.nii');
roifile = read('roi.nii'); %binary roi in MNI space and with the same
dimensions that gmfile
prod = gmfile .* roifile;
GM_volume = sum(prod(:));
Is that correct?
Thanks a lot!
Fred
