Dear List,
I would like to measure changes in regional brain metabolism in FDG PET
images of patients with traumatic brain injury.
My biggest problem is that each of the 13 patients has only two scans
(baseline and followup). In SPM2, I suffer from low degrees of freedom and
zero variance. And unfortunately I can not combine the data from multiple
patients either, as each subject has a different location and cause for the
brain injury.
Is it possible to design an analysis to quantify differences with SPM or
am I limited to the difference images?
Thanks in advance for your help.
Nathan
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