I am using the SFNR output as a voxel-wise covariate in 3dMVM, partly because my study includes multiple scanners, and I want to make sure that cohort differences aren't being affected by different SNR at different sites.
I can add the sfnr as a nuisance variable and it runs just fine, however if I try to add a contrast including SFNR (by adding, e.g. -gltCode 50 'Group 1*site1 sfnr : ' ) then I get the error
** Error:
Incorrect level coding in variable sfnr : :
Is it possible with the current 3dMVM program to get a contrast map including the voxel-wise variable?
