Dear Doug,
I wonder if you could get the chance to finish the work regarding the Nearest Cortical Label (Annotation) for the CVS space. Also, I have few questions and I will appreciate if anyone can help:
1) Can I get more clusters after I correct for multiple comparison than the number of clusters I have in the uncorrected results? Is this possible?
2)When I change the smoothing from fwhm 10 to fwhm 20 for example why I am loosing from my clusters (uncorrected results)? Also in this case my clusters show became larger no?
3) I found my significant clusters after multiple comparisons for the FA group analysis study and I would like to dilate all regions for a better visualization, using the dilM function of the FSL tool fslmaths.Can you please advise me how to do it if I have the significant clusters file permcsd.sig.cluster.mgh?
4) As I mentioned before,I completed my DTI group analysis at subcortical level on the CVS space and found clusters that survived by multiple comparisons. The results shows that FA is decreasing in patients vs. controls.
I used then the same subjects to do a structural group analysis to compare the cortical thickness between the two classes. I found some clusters on the fsaverage but this time they different located then the clusters found in my DTI data. Is this right? I suppose it should be since I compare two different data sets for the same subjects: FA clusters on subcortical CVS space vs. structural data on the fsaverage. I still found that my cortical thickness is decreasing in patients vs. controls but is there any relation that I can established between the two studies?
Can I merge my structural results with my subcortical results? I was reading about this on your webpage:http://surfer.nmr.mgh.harvard.edu/fswiki/FsFastTutorialV5.1/FsFastGroupLevel
but I am not sure if in this case the structural analysis is using the same functional data set while in my case I have same subjects but structural data for the structural group analysis and DTI data for the subcortical analysis.
Can you please make this a little clear for me? How can I run a structural analysis on my DTI data?
Many thanks!Antonella