Dear SPMers,
I am running a VBM study with SPM5 but I am confused about which parameters
from the “custom” options to choose. I have run different segmentation with
different parameters and I am getting different results.
Should I start with the standard values?
After that should I empirically change the customs parameters?
From which one should I start modifying?
The standard values for the segmentation are:
1.Custom
a.Tissue probability maps
i.Gray, white and CSF
b.Gaussians per class
i.2 2 2 4
c.Affine regularization
i.ICBM space template - Europe
d.Warping regularization
i.1
e.Warp frequency cutoff
i.25
f.Bias regularization
i.Very light regularization (0.0001)
g.Bias FWHM
i.60 mm cutoff
h.Sampling distance
i.3
Thanks in advance for the help,
Jorge.
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