signal noise ratio in the OFC from 3dTstat -tsnr

Dear AFNI experts and users,
I used multiple voxel pattern analysis to decode conditions from the OFC. But, one reviewer commented this:

It is a bit unclear whether multiple voxel pattern analysis will have sufficient signal-to-noise given high susceptibility OFC. The authors should clarify that they have sufficient signal to measure.

So how can I test and measure whether the OFC has sufficient signal? I find the 3dTstat -tsnr could measure the signal noise ratio. Could I use this?
All the best.