Dear Group,
How do I diasble the calculation of the global intensity in
spm_global.m (which is part of the fMRI stats step used in creating
beta.imgs) and let me use my own chosen global intensity value instead
(ie. I want to choose my own mean value Z for a patient's image volumes
and use that to multiply each voxelby (100 / Z)?
As per prior e-mails, the default global intensity appears to be off in
several subjects for my dataset in spm2 (intensities in the 300s not the
100s). The global means appear different for each subject.
Thanks,
Jeff Lorberbaum
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