Hi,
 
I want to create an average thickness map of lh and rh. I have run surfreg steps to map lh to lh sym and rh to rh sym.  
 
Can you advise what to do next to mke average thickness maps between two hemispheres ? 
 
Will either mris_calc or mri_average work to make the average map ?
 
Thank you 
 
Subha