I don't understand what you don't understand. Isn't the web page clear enough? Are those 5 steps on the web page?
On 09/18/2017 02:20 AM, stdp82@virgilio.it wrote:
Thanks, but I not understand if the follow step that you suggested me should be used also for FS-FAST analysis.
Specifically, I'm refferring to:
1Sample each individual's surface onto the average surface. 2Compute the difference between each of the pairs in the average surface space. 3Concatenate the differences into one file. 4Smooth on the surface (optional) 5Perform analysis with mri_glmfit on this file
Importantly, should I create the two fsgd files as reported in the web page and below? Or only the second is due?
One is: GroupDescriptorFile 1 Class Main Input subject1 Main Input subject1match Main Input subject2 Main Input subject2match Main Input subject3 Main Input subject3match Main Input subject3 Main Input subject3match Main
the other is: GroupDescriptorFile 1 Class Main Variables Age Input subject1pair Main 30 Input subject2pair Main 40 Input subject3pair Main 50 Input subject4pair Main 60
Thanks
Regards
Stefano
----Messaggio originale---- Da: "Douglas Greve" <greve@nmr.mgh.harvard.edu> Data: 18-set-2017 0.13 A: <freesurfer@nmr.mgh.harvard.edu> Ogg: Re: [Freesurfer] FS-FAST longitudinal analyis That looks correct. You can also checkout the instructions here: https://surfer.nmr.mgh.harvard.edu/fswiki/PairedAnalysis On 9/17/17 6:07 PM, stdp82@virgilio.it wrote:Hi list, I'm not sure that the files reported below are correct to assess the longitudinal difference between T1 and T2. Please, could you check it? The result which I have obtained bu running mri_glmfit is too strange. Thanks Best regards Stefano 1) PAIRWISE.fsgd file ------------------- GroupDescriptorFile 1 Class subj1 Class subj2 ... Class subjN Variables TP1-vs-TP2 Input subj1_tp1 subj1 1 Input subj1_tp2 subj1 -1 Input subj2_tp1 subj2 1 Input subj2_tp2 subj2 -1 ... Input subjN_tp1 subjN 1 Input subjN_tp2 subjN -1 ---------------------------- 2) mean.mtx 1 1 ... 1 0 ------------------------------ 3) tp-effect.mtx 0 0 ... 0 1 ------------------------------ 4) mri_glmfit --glmdir PAIRWISE --y ces.nii.gz --wls cesvar.nii.gz --surface fsaverage rh --nii.gz --fsgd PAIRWISE.fsgd doss --C mean.mtx --C tp-effect.mtx _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
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