External Email - Use Caution Hi Martin,
Thanks for your reply, it's good to know that the mass-univariate approach is still appropriate here. Since the aseg segmentations are volumetric, can I still use the *mris_preproc* and *mri_surf2surf* functions? If so, would the mri_preproc function look something like *mri_preproc --qdec-long /path/to/asegstats2table.long.table --target fsaverage --hemi rh --meas volume --out output_dir/rh.volume.mgh* If not, and I need separate functions, would *mri_surf2surf* be replaced by *mri_vol2surf*? On Thu, Jun 27, 2024 at 4:51 AM Reuter, Martin,Ph.D. < mreu...@mgh.harvard.edu> wrote: > Hi Dan, > > You could do either one. I would recommend the mass univariate for > multiple independent test with the same design. > > Best, Martin > > On 26. Jun 2024, at 17:20, Dan Levitas <djlevitas...@gmail.com> wrote: > > > I recently performed an LME longitudinal mass-univariate (surface) > analysis and am now trying to do something similar, but with subcortical > (aseg) ROIs instead. > > I first created an aseg table with the following command: > > > > > > * asegstats2table \ --sd $subjects_dir \ --qdec-long > /path/to/long.qdec.table.dat \ --segno 4 10 11 12 17 18 26 43 49 50 51 53 > 54 58 251 253 255 \ --stats aseg.stats \ --tablefile $output_file* > > > The LME tutorial ( > https://surfer.nmr.mgh.harvard.edu/fswiki/LinearMixedEffectsModels) > provides information and examples of both a univariate and mass-univariate > approach. While univariate seems most appropriate in this case, the example > details design matrix setup and testing of a single ROI (hippocampus), > whereas I would like to assess several subcortical ROIs. > > Would I simply create a loop structure to set up design matrices for each > ROI (both hemispheres) and test them individually, or can I perform a > mass-univariate approach to assess all ROIs at once? > > Thanks, > > Dan > > > _______________________________________________ > 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 Mass General > Brigham Compliance HelpLine at > https://www.massgeneralbrigham.org/complianceline < > https://www.massgeneralbrigham.org/complianceline> . >
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