Dear FSLers,
First some context...
I have to run a VBM pilot analysis on 1 patient for which I have
repeated measures: 3 anatomical MRI (same protocol on 3 consecutive
days) every months for 5 months (6 time points in total: 1 at the
beginning of each month and one at the end of the 5th month). I am
interested in the possible difference in GM at each time point compared
to the previous, and compared to the first scan.
Now, my struggle :)
I have difficulty making the design.mat file needed to run
fslvbm_3_proc.
After reading this page
https://fsl.fmrib.ox.ac.uk/fsl/fslwiki/GLM#Experimental_Designs_-_Repeated_measures,
I've made the following design.mat (explanation of the column just after
the design):
1 1 1 1
1 1 2 1
1 1 3 1
1 2 1 1
1 2 2 1
1 2 3 1
1 3 1 1
1 3 2 1
1 3 3 1
1 4 1 1
1 4 2 1
1 4 3 1
1 5 1 1
1 5 2 1
1 5 3 1
1 6 1 1
1 6 2 1
1 6 3 1
I have 1 group (first column), 6 time points (second column), 3 sessions
for each time point (third column), 1 subject (fourth column).
But I don't know if this is correct design.mat or even the best
design.mat to analyse my pilot data.
Thanks so much for your help!
Margaux
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