Dear FreeSurfer experts,

I would like to understand better the principle of eddy_correct:

-in which way the eddy currents caused by motion are set apart from the eddy currents caused by fast switching diffusion-encoding gradients?

-and then, how are the affine registration matrices reflecting motion computed by eddy_correct considering the previous issues?

-does eddy_correct even computes these affine registration matrices(dwi.ecclog)? or is it another tool of dmri_motion?

Thanks,

Loïc Daumail

Graduate intern at Athinoula A. Martinos Center for Biomedical Imaging MGH/HST