Dear FSL-users,
i would like to ask you for your opinion.
The result of a study including 66 controls and 113 pacients was that the whole brain skeleton has significant lower FA values in patients (with p<0.0001, everything appears yellow), that seem very strange to me.
Trying to find out what happens:
The index.html file shows apparently correct FA maps (http://img831.imageshack.us/img831/4897/slicedir.jpg)
The order of the subjects in the origdata file is correct in relation to the design matrix.
The nonlinear registration seems to be ok too, when looking to the individual FA_to_target maps.
It seems that there is a problem with the visualization (see attached)? Strange is, when doing a time series on the all_FA map for example in the corpus calosum (http://img189.imageshack.us/img189/728/fslview.jpg) then the FA values seems to be projected correct (besides of some outliers).
We are using 16Gb Memory 12 core Mac, that shouldn't be the problem.
Can it be within the permuation process due to memory problems?
Does somebody has an idea what could have happened?
Attached slicedir index file
Thanks in advance!
Gabriel
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