Re: [Freesurfer] eTIV question

; From: "Harms, Michael" <mha...@wustl.edu> > To: "freesurfer@nmr.mgh.harvard.edu" <freesurfer@nmr.mgh.harvard.edu> > Cc: > Date: Sun, 21 Feb 2016 18:10:12 + > Subject: Re: [Freesurfer] eTIV question > > Hi, > Why not use a measurement of brain

Re: [Freesurfer] eTIV question

yes, it's a somewhat different and more conservative test. I guess you could check the talairach transforms of some of your subjects with eTIVs that don't make sense (or change the most over time) to try to see why this is happening. Or take Mike's suggestion and test a different (but probably

Re: [Freesurfer] eTIV question

Hi, thank you I think this would test something different: 'how much a brain area is atrophic controlling for the average brain atrophy' and not 'how much a brain area is atrophic controlling for the individual differences in head size'. Doesn't it? Angela "Harms, Michael" ha

Re: [Freesurfer] eTIV question

there is a mistake in the graph, hippocampal volume is TIV2 I apologize for that! Angela Favaro ha scritto: > Hi Bruce, > please find attached the graph of the correlation between the two time > point. I did not find outliers or failures. However the discrepancy >

Re: [Freesurfer] eTIV question

Hi Angel the time1/time2 correlation of eTIV is pretty worrisome. Are you sure that there aren't outliers/failures in that set? Bruce On Sun, 14 Feb 2016, angela.fav...@unipd.it wrote: > Dear Freesurfer experts, > I have a question about eTIV (FS 5.3) which I use as a covariate where >

Re: [Freesurfer] eTIV question and longitudinal issue

Hi all, I would be very grateful of any advice for the problem below with e-TIV. I have another problem with the longitudinal streaming (it is the first time I use it). I am running the .base and .long procedure in subjects with only one measure to include them in a mixed liner model analysis (as

[Freesurfer] eTIV question

Dear Freesurfer experts, I have a question about eTIV (FS 5.3) which I use as a covariate where appropriate. Is it in some way influenced by the presence of brain atrophy? I have a new sample of subjects in a longitudinal study: at time 1 they have some atrophy (due to low body weight) that