I have 18 ROI centers. I use 3dUndump to make 18 ROI masks of radius 10 (giving values 1-18). Because of the large size, there are overlaps. So when i combine them using 3dcalc using formula (a+b+c+d+e+f+g+h+i+j+k+l+m+n+o+p+q+r) and then do 3dNetCorr, i end up with 20 columns with codes 1-18 , 25 and 28. Can you suggest how to deal with this? I would still want 18 ROIs in the end. My guess is that there is overlap and when i do 3dcalc the values get added. From the images i can see some of the ROIs overlapping.
Thanks
Prateek
