Dear SPMers
I have converted a set of Interfile SPECT images to Analyze format using
the MRIcro program. The original images had negative values outside the
brain, which have been preserved after the conversion.
I would now like to convert those values to zero before performing
statistical analyses on the data using SPM. Does anyone know of a good
way to do that? I fear that if I leave the negative values unchanged,
these could influence the global normalization using proportional
scaling.
Best regards, Griselda.
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