Dear All, 

I have seen bbregister command lines using --o option to get the final output (say a .nii vol), and others where bbregister is used to get an lta transform, which is used in a follow-up step (mri_convert with -ns 1 (no scale), and -rl orig.mgz (reslice-like)

Are these options equivalent? meaning

when using bbregister with '--o x.nii' option, is the output volume x.nii  resliced to orig.mgz, and without rescale?

Thanks, 

Octavian