Sorry if this seems a trivial question but I've only just started using SPM
to analyze some fMRI data having had some limited experience with PET data
and I was wondering if some one could explain why you can't use a PET model
(e.g 10 scans EPI at rest 10 scans EPI active) to look for mean differences
in fMRI, why is it necessary to model it as a time series and have more than
one period of rest and activation.?
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