Dear Gonzalo Rojas,
> I read that the PET SPM template iwas created using Oxygen-15 labeled
water images...
Correct.
>That template could be use to normalize FDG PET
images?... Or we must create a new PET template image using FDG-PET
images ?...
Creating your own would be desirable for a lot of reasons: 1. different tracer 2. different camera 3. the PET template in SPM has some mismatches with MNI/ICBM152 space, particularly in the inferior temporal lobes.
You could check the Archives for detailed instructions on how to do this (it's not that difficult with modern 15+ cm FOV scanners).
Good luck,
Alexander
> Sincerely,
>Gonzalo Rojas Costa
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