-13-
GNow letÕs take those
10 masks (we donÕt need 10 separate masks) and combine them to make one
master or Òfull maskÓ, which will be used to calculate the percent
signal change only for values inside the mask (i.e., inside the brain).
G3dcalc -- one of the most versatile AFNI programs -- is used
to combine the 10 masks into one:
3dcalc-a mask_r1+orig -b mask_r2+orig -c mask_r3+orig \-d mask_r4+orig -e mask_r5+orig -f
mask_r6+orig \-g mask_r7+orig -h mask_r8+orig -i
mask_r9+orig \-k mask_r10+orig \-expr Ôstep(a+b+c+d+e+f+g+h+i+j)Õ \-prefix full_maskåOutput: full_mask+orig: