Dear SPMers,
I always assumed that the T1 template in spm was derived (or even identical) to the ICBM standard of a bunch of averaged T1s "ICBM 452 T1 Atlas" or previous versions, downloadable at http://www.loni.ucla.edu/ICBM/ICBM_ICBMAtlases.html
At this website, some nice probability maps of brain regions and nuclei are available, we want to use them as ROIs for a few studies (with data registered to MNI).
Unfortunately, I noticed after downloading that these images are NOT in MNI space, at least the origin is not at the AC. It is set at [0 0 0]. I found some references to this in the list:
http://www.jiscmail.ac.uk/cgi-bin/wa.exe?A2=ind0311&L=spm&P=R59315&I=-1
http://www.jiscmail.ac.uk/cgi-bin/wa.exe?A2=ind0311&L=spm&P=R57124&I=-1
So apparently MNI ~= ICBM ? (in Matlab, MNI !=ICBM for C programmers). Unfortunately I didn't find much on how to solve this.
Does anyone now if, and perhaps how, I can transform the images from ICBM to MNI? All the images downloadable at ICBM seem to occupy the same space, so I guess if I can transform one to MNI I can transform them all.
I could of course affine coregister the ICBM template and ROIs to the MNI template in SPM2 (and I will if there is no other solution), but if this is a known and fixed transformation I'd prefer to use that.
Any help would be greatly appreciated.
Kind regards,
Bas
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Dr. S.F.W. Neggers
dept. of Psychonomics,Helmholtz Institute
Utrecht University
Heidelberglaan 2
3584 CS, Utrecht, room 17.09
the Netherlands
Tel: (+31) 30 253 4582 Fax: (+31) 30 2534511
E-mail: [log in to unmask]
Web: http://www.fss.uu.nl/psn/pionier
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