Hi Silvia, it is never a good idea to mix versions and we did not test any such combinations. Also because 5.1 is much better than 4.5 I would definitely recommend to rerun.
However, I still believe that it should be possible to use the 5.1 post-processing scripts to e.g. create rate maps for each subject and qdec to analyze them even with 4.5 processed data. Best, Martin On Tue, 2011-07-26 at 10:45 +0200, Silvia Juanes wrote: > Hi Martin, > > We used the preprocessing pipeline from 4.5 version and then we used > the 5.1 version to perform the longitudinal analysis. Do you think > that we should repeat the preprocessing using 5.1 version? or do you > know any other solution to do the analysis with the 4.5 preprocessing > data? > > Best, > > Silvia > > 2011/7/25 Martin Reuter <mreu...@nmr.mgh.harvard.edu> > Hi Silvia, > > qdec does not support any longitudinal analysis (only cross > sectional). > So I assume you either compare groups cross sectionally (e.g. > at > baseline) or you constructed your own longitudinal measure > (e.g. percent > change, within each subject) and then do a cross sectional > analysis of > that statistic? > Both these things should work. I think your qdec table is > setup > incorrectly? > > Best, Martin > > > On Tue, 2011-07-19 at 12:45 +0200, Silvia Juanes wrote: > > Dear all, > > We are preprocessed our data to perform a longitudinal study > using > > longitudinal pipeline of Freesurfer 4.5. However, when we > try to do > > the group-analysis using qdec (Freesurfer 5.1), we obtain > the > > following error: > > > > > > ERROR: QdecGlmDesign::GenerateContrasts: factor 1 must have > 2 levels > > ninputs = 64 > > Checking inputs > > nframestot = 64 > > Allocing output > > Done allocing > > nframes = 64 > > Writing to /home/barbara/subjects/qdec/Untitled/y.mgh > > gdfReadHeader: > reading /home/barbara/subjects/qdec/Untitled/qdec.fsgd > > INFO: gd2mtx_method is dods > > Reading source > surface /home/barbara/subjects/fsaverage/surf/lh.white > > ERROR: no contrasts specified. > > Error in Analyze: command failed: mri_glmfit > > --y /home/barbara/subjects/qdec/Untitled/y.mgh > > --fsgd /home/barbara/subjects/qdec/Untitled/qdec.fsgd dods > > --glmdir /home/barbara/subjects/qdec/Untitled --surf > fsaverage lh > > > > > > > > Has anyone experienced a similar problem and is there any > way to correct it? > > > > > > Best, > > > > > > > > > _______________________________________________ > > 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
