[Freesurfer] PairedAnalysis Longitudinal data

Hi, I have a question about the paired-diff.fsgd file listed on the freesurfer wiki. I have 3 groups and 2 time points. How is the subject1pair computed? GroupDescriptorFile 1 Class Main Variables Age Input subject1pair Main 30 Input subject2pair Main 40 Input subject3pair Main 50 Input su

Re: [Freesurfer] 2 stage model longitudinal data analysis

do I need to run long_mris_slopes on the --qdec.long table? the example is not for a longitudinal analysis. I have 2 time points and 3 groups. M. Alejandra Infante, Ph.D. Postdoctoral Fellow UC San Diego Department of Psychiatry Adolescent Brain Cognitive Development (ABCD) Study _

Re: [Freesurfer] 2 stage model longitudinal data analysis

Hi Maria, yes, the example on the wiki is a simple “one sample group mean” (osgd). You can find examples with more than one group here: https://surfer.nmr.mgh.harvard.edu/fswiki/FsgdExamples Best, Martin > On 13 May 2017, at 00:24, Ma

Re: [Freesurfer] Question of longitudinal processing

Hi Jahanvi, 1. yes, you need to create this table to then perform the stats 2. no, the format is as I described it below fsidfsid-base tp1_subA templatesubA tp2_subA templatesubA tp1_subB templatesubB tp2_subB templatesubB this is assuming that you called your base templatesubA a

Re: [Freesurfer] LME : longitudinal correlations between imaging and cognition scores

Hi Matthieu, yes, that is possible. Instead of group, you use a variable for your score (and interaction etc). Sometimes it may also makes sense to use score instead of time. Best, Martin > On 12 May 2017, at 10:51, Matthieu Vanhoutte > wrote: > > Dear Freesurfer's experts, > > I have s

Re: [Freesurfer] Longitudinal hippocampal subfields analysis

Hi Manuel, smoothing is usually only necessary for surface data. You should have crated the subfields on top of the longitudinal directories, so: > recon-all -long -hippocampal-subfields-T1 > Else they will only be available in the cross dirs. The longs will have better reliability. Best

[Freesurfer] mri_glmfit mask.mgh for mri_surfcluster

Dear Experts, This is partially a follow-up question to another thread related to the mask.mgh generated by mri_glmfit (http://www.mail-archive.com/freesurfer@nmr.mgh.harvard.edu/msg50691.html ). We would like to use the