There is no such long process for PET. The idea is that you process the MRI in a longitudinal way, then sample the PET data onto the surface of the closest MRI time point. Then proceed in a way similar to the thickness analysis
On 09/29/2016 11:08 AM, Matthieu Vanhoutte wrote: > 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 <mailto: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 <mailto: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 <mailto: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 > <mailto:Freesurfer@nmr.mgh.harvard.edu> > >> https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer > <https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer> > >> > >> > > > > > > _______________________________________________ > > Freesurfer mailing list > > Freesurfer@nmr.mgh.harvard.edu > <mailto:Freesurfer@nmr.mgh.harvard.edu> > > https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer > <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 > <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 -- Douglas N. Greve, Ph.D. MGH-NMR Center gr...@nmr.mgh.harvard.edu Phone Number: 617-724-2358 Fax: 617-726-7422 Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting FileDrop: https://gate.nmr.mgh.harvard.edu/filedrop2 www.nmr.mgh.harvard.edu/facility/filedrop/index.html Outgoing: ftp://surfer.nmr.mgh.harvard.edu/transfer/outgoing/flat/greve/ _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
