Hi Heidi, the easiest way is probably to do the analysis with mri_glmfit specifying that each subject is it's own group and a contrast to compute the difference between the groups.The gamma.mgh in the contrast directory will be the thickness difference between the two subjects. There will be a sig.mgh there as well, but, as you mention, you will not be able to get reasonable p-values out because of not enough DOF. doug
On 10/11/2012 08:31 AM, Jacobs H (NP) wrote:
Hi FreeSurfers,
I am preparing a simple presentation, to show some basic stuff in my lab and therefore I would like to compare the cortical thickness of two subjects. Is there a way to do this? For the GLM, I probably have not enough degrees of freedom? Is there a way that I could subtract the two thickness overlays?
Thanks Heidi
================================================ Dr. Heidi Jacobs Postdoc researcher Faculty of Health, Medicine and Life Sciences School for Mental Health and Neurosciences Division Cognitive Neuropsychiatry and Clinical Neurosciences Alzheimer Center Limburg h.jacobs@maastrichtuniversity.nl www.maastrichtuniversity.nl www.heidijacobs.nl
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