I am using Dartel (SPM12) to normalize my data. I have used the procedure explained in VBM Tutorial (John Ashburner, March 12, 2015).
I checked my normalized data using SPM normalization and Dartel normalization,(T1 images normalized with default SPM procedure according to the manual).
It seems to me the normalized brains with Dartel are slightly smaller than MNI template(avg305T1). it is also smaller than the output from default SPM normalization procedure. I have attached an example of the problem.
Could you please let me know where the problem can happen?