Dear marsbar user,
I m a very new marsbar user but convince that marsbar would give me large
opportunity to progress in my work. I am working on parametric PET data in
differents groups of analysis that represents in each voxel the absolute
values of transporter availability. There is an important known effect of
age on the PET signal in some brain regions that I had controlled in SPM
analysis with age as covariate in SPM5. I would like to extract signal in
cluster with marsbar that already removed the efffect of age on the signal
in order to search for other correlations that could potentialy be
influenzed by age. My question is : When I extract data from my cluster of
interest with full options. Must I select spm design and scaling from spm
design (and not raw data) in order to obtained no realistic values of
transporter but rescaled values corrected for the influence of age in the
signal ?
Sorry for my very naive question and Hope somebody could help me.
Best regards,
Claire
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