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Dear All, I would like to calculate voxel-wise signal to noise maps and temporal signal to noise maps (functions in signal to noise over time). Does anyone knows how to do this (possible using imcalc or a script)? I searched on the mailinglist archives and found the message below. Unfortunately, the message that is referred to is no longer available. All suggestions are welcome. Thanks a lot! Maartje Hi, If you want a voxelwise mean over a voxelwise standard deviation for a bunch of images, i.e. you want an SNR image, then use spm_imcalc_ui as in this post: http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0608&L=SPM&P=R45864 <http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0608&L=SPM&P=R45864> If you want mean over std of the voxels of a single image, then the attached should do the trick. And if you want something else, please ask again! Best, Ged. -- Maartje Luijten, MSc Institute of Psychology Erasmus University Rotterdam Woudestein T13-07 PO Box 1738 3000 DR Rotterdam The Netherlands Tel: +31 10 408 9729 Mob: +31 647 949 807 Fax: +31 10 408 9009 E-mail: [log in to unmask]