Dear Anderson, Thank you. But, for MELODIC group-analysis, what can be the Main Structural Image required for the non linear registration? Again thanks. With best regards, Christophe ________________________________ De : FSL - FMRIB's Software Library <[log in to unmask]> de la part de Anderson M. Winkler <[log in to unmask]> Envoyé : lundi 16 avril 2018 02:01 À : [log in to unmask] Objet : Re: [FSL] FNIRT MELODIC group-analysis Hi Christophe, Yes, use the option "Nonlinear" in the Registration tab. All the best, Anderson On 12 April 2018 at 06:48, Christophe HABAS <[log in to unmask]<mailto:[log in to unmask]>> wrote: Dear Experts, Is it to possible to perform FNIRT registration with MELODIC for multisubject analysis? Thank you. Best, Christophe