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Some of these links may help... https://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind1007&L=spm&P=R8999&1=spm&9=A&I=-3&J=on&d=No+Match%3BMatch%3BMatches&z=4 https://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0909&L=spm&P=R71498&1=spm&9=A&I=-3&J=on&d=No+Match%3BMatch%3BMatches&z=4 https://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0911&L=spm&P=R54999&1=spm&9=A&I=-3&J=on&d=No+Match%3BMatch%3BMatches&z=4 https://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind1111&L=spm&P=R3059&1=spm&9=A&I=-3&J=on&d=No+Match%3BMatch%3BMatches&z=4 https://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind1101&L=spm&P=R65224&1=spm&9=A&I=-3&J=on&d=No+Match%3BMatch%3BMatches&z=4 Best regards, -John On 7 July 2012 05:04, Chao Suo <[log in to unmask]> wrote: > Hi Donald and SPM experts, > > I found there are some differences of using two methods to convert my GM map > from Dartel space to MNI: > > Method 1, using normalize_DARTEL.m(1) from > http://brainmap.wisc.edu/assets/normalize_DARTEL.m > 1a, Affine transform Templat_6.nii to grey.nii using Normalise:Estimate. > Nonlinear Frequency Cutoff --> Inf; Nonlenear Iterations--> zero > 2b, normalize_DARTEL.m (1) % modulate: > choose Template_6_sn.mat and "mwrc1*.nii" from the Create Warped step > (parameter were set up as the manual) > > Method 2, using tools->Dartel tools->Normalise to MNI Space (SPM8) > Dartel Templat--> Template_6.nii > according to Many subjects: Flow fields --> u_rc1* > Images --> "rc1*" > Preserve --> preserve Amount (modulate) > FWHM --> 0 0 0 ( to compare with method 1) > > However, as I attached the screenshot, there are some small difference > between these two results (method 1 is the first line; method 2 is the > second line), even after reslice the image from Method 1 according to that > of Method 2 (line 3). The two columns are two subject's image. There are > some unique stripes and wholes in the line 2 images which were generate by > method 2. I am confused, as these two methods should do the same job. > > I wonder whether this difference is normal, though I assume they might look > the same after smoothing. Or, is there any mistakes in my procedures. > > Thanks > Chao Suo > -------------------------------------------- > PhD Candidate, School of Psychiatry, UNSW, Australia > Brain & Mind Research Institute THE UNIVERSITY OF SYDNEY > Room 401, Level 4, M02K | 100 Mallett St Camperdown | NSW | 2050 > T +61 2 9351 0728 | F +61 2 9351 0551 >