Hi Bruce, Thank's for the reply! I'm not concerned about hippocampal volume for now, mostly needing cortical thickness for my project! Yes, I am using v5.1. So in case of cortical thickness I shouldn't worry too much about Talairach registration? could you please tell me what are the main things I should check and pay attention to for cortical thickness? I'm following the troubleshooting page (http://surfer.nmr.mgh.harvard.edu/fswiki/RecommendedReconstruction) and I see some discrepancies in the pial/WM surfaces but again I am not sure how much I should correct!
Thanks again, -Mojdeh On 07/20/2012 04:15 PM, Bruce Fischl wrote: > Hi Mojdeh > > it won't affect any individual thickness measures, *but* will affect > the estimated total intracranial volume (eTIV). We don't typically use > eTIV for thickness correction, but do for things like hippocampal > volume. Are you using version 5.1? If so, that's the problem. Nick has > a fix for this that he can direct you about, or you can wait for 5.2 > and rerun the Talairach registration then. > > cheers > Bruce > > > On Fri, 20 Jul 2012, Mojdeh Zamyadi wrote: > >> Hi all, >> >> Sorry for re-posting this but it seems it didn't get through! >> >> I've just started to do cortical thickness analysis on some subjects and >> I'm noticing some miss-registrations, more specifically the Talairach >> image is smaller than the target image no matter what subject I look at! >> I just wanted to make sure if this is something normal and to what >> extend it's going to effect the individual cortical thickness >> calculations. I guess I'm not sure how the Talairach transformation is >> used in further steps of the cortical thickness calculation. >> >> I tried to attach example coronal, sagittal and horizontal slices of one >> of my subjects but apparently it was too big for the mailing list. Pleas >> let me know if there is a way to attach images here. >> >> I greatly appreciate your advice. >> >> Thanks, >> Mojdeh Zamyadi, MSc >> Clinical Research Project Assistant >> The Hospital for Sick Children >> 555 University Avenue >> Toronto, ON, M5G 1X8 >> _______________________________________________ >> Freesurfer mailing list >> Freesurfer@nmr.mgh.harvard.edu >> https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer >> >> >> > > > The information in this e-mail is intended only for the person to whom > it is > addressed. If you believe this e-mail was sent to you in error and the > e-mail > contains patient information, please contact the Partners Compliance > HelpLine at > http://www.partners.org/complianceline . If the e-mail was sent to you > in error > but does not contain patient information, please contact the sender > and properly > dispose of the e-mail. > _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
