Hello SPM'ers,
I have a question regarding global normaliztion options in the SPM2 PET models.
I have 2 groups of patient scans (more than 9 patients in each group) with 3 different scan time points (conditions) for each group.
I choose Ancova for the global normalization option and find that there are some activation
clusters that lie outside the brain. I looked at the "con*.img" and looks like the image is
a lot larger than any of the smoothed, normalized image. Any help on what options need to be chosen for global normalization will be helpful.
I looked up the email list, but that didn't help much.
Thanks,
Binu
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