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Dear Carles, Thank you for your reply. I have to say that I do not really know how Siemens MRI compute this correction. I'll try to check this with our engineer. The other problem is that I only have MoCo series and when I check the realign parameter from SPM process, I can see nearly great motions (0.5 to 1mm on translation and 2mm on rotation). I though that MoCo could do a better job... Alexandre 2017-05-03 10:44 GMT+02:00 cfalcon <[log in to unmask]>: > Hi, > everything is oK using MoCO but the use of the movement parameters as > nuisance variables to remove movement-related intensity variations. As the > scanner corrects for movement, SPM realign parameters are close to zero and > the rp_txt file do not account for the real movement during the > acquisition, just for slight inaccuracy of the scanners correction. It was > that way when I worked with Siemens several years ago. I don’t know if this > issue has been fixed in posterior software updates. To be sure, you can > compare the realign parameters of Movement corrected images with the > realign parameters of the without corrections sequence. > Best, > _______________________ > > > *Carles Falcon*MRI Physicist > *Barcelona**β**eta** Brain Research Center* > *Fundació* > * Pasqual Maragall**T. (+34) 933263163 <%28%2B34%29%2093%20316%2009%2090>* > Wellington, 30 (Campus UPF) > 08005 Barcelona > *www.fpmaragall.org* <http://www.fpmaragall.org/> > > > > > > El 03/05/2017, a les 7.14, Alexandre Obert <[log in to unmask]> va > escriure: > > Dear all, > > I wonder if any of you had some experience with MoCo series in a Siemens > MRI. > I've got only MoCo (interleaved acquired) series for a fMRI protocol and I > wonder if there is any specific precaution about preprocessing such as > realignment and motions parameters to be included in the GLM? > > Regards, > > Alexandre > > >