Dear Freesurfer's experts, Could you answer me about my last question with no response in the mail below ?
When using cortical thickness in longitudinal analysis with LME, we used lh.thickness or rh.thickness from -long subject directories. These data followed particular processing steps including registrations in order to use them with more precision in longitudinal studies, didn't they ? My problem is that I would like to perform longitudinal study on PET data images with LME. So I wonder if I just have to resample onto -long cortical subject surface ? Do I need to follow the same steps than cortical thickness from cross-sectional to -long subject directories ? If this is the case, which commands should I use to mimic cortical thickness longitudinal data ? Many thanks in advance for helping ! Best regards, Matthieu 2016-09-18 23:02 GMT+02:00 Matthieu Vanhoutte <matthieuvanhou...@gmail.com>: > Hi Martin, > > Thanks for your answer. However, it seems to me that cortical thickness > follow a particular process with the recon-all -long process, isn’t it ? Is > there any resample onto average time subject then other operation following > ? > > Best regards, > Matthieu > > > Le 18 sept. 2016 à 16:26, Martin Reuter <mreu...@nmr.mgh.harvard.edu> a > écrit : > > > > Hi Matthieu, > > > > I never used PET data, but once you manage to resample you pet data onto > the surface, you will have a file similar to the thickness file for each > subjects. Instead of thickness it holds you PET information. From that > point on everything should be identical to the thickness analysis. > > > > So this is really more a question how to get your PET data sampled onto > the surface. If no one else replies, write that into the subject line and > repost. > > > > Best, Martin > > > > > >> On Sep 17, 2016, at 7:37 AM, Matthieu Vanhoutte < > matthieuvanhou...@gmail.com> wrote: > >> > >> Dear Freesurfer’s experts, > >> > >> I would like to use the longitudinal mixed-effects model for surface > PET analysis. Although I could find all the process to follow the > longitudinal analysis of cortical thickness, I couldn’t resolve the > steps/commands to apply successively to coregistered PET data on T1 MRI. > >> > >> Could you precise me the process and commands to use for PET > longitudinal analysis ? > >> > >> Many thanks in advance ! > >> > >> Best regards, > >> Matthieu > >> _______________________________________________ > >> Freesurfer mailing list > >> Freesurfer@nmr.mgh.harvard.edu > >> https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer > >> > >> > > > > > > _______________________________________________ > > 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. > >
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