Jeremy Wrote:
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> Hi everyone!
> Normalize: 3dcalc -gscale -datum float -prefix
> func_normalized -a func_+orig -b mean+orig -expr
> "a/b*100"
> The normalize I mean is to let the functional
> data to divide the mean value of themselves.
> I want to know if it is necessary to do it so
> that every subject are at the same level before I
> do the 3dDeconvolve.
Yes, that's generally advised. Mean intensity can vary over runs, and this normalization step can help in correcting that.