Dear FS experts,

I am using Qdec to study the differnce in cortical thicnkess between two groups.

Qdec is running a GLM analysis. This will output a statistical map (sig.mgh) for the differnce between the groups in cortical thicnkess.

How can I extract the numbers of cortical thickness for every subject (depending on the order of subjects in Qdec table) from this statistical map ?