afni.nimh.nih.gov

Hi:
I linked two sessions with 3dTcat program, at the same time, removed the the linear drift with option -rlt++: It removed 'b0+b1t' together. But I met a problem when I tried to standardized the results with program
"3dcalc -a myresult.irf -b 'myresult.bucket[0]' -expr '100*a/b' -fscale
-verbose"
Since the b0 has been removed, this standardized method seems not to be right. But how can I standardize the result in this situation.
Thanks a lot!