Hi,
I want to select only grey matter voxels from fMRI images. Segmentation in SPM produces gray matter masks (name starting with c1). However, this mask has so many intensity values apart from 0 and 1.
Ideally it should have only two values (1 and 0). Which intensity values should i use to mask fMRI images?
Many thanks in advance!
with regards,
Priya
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