Re: [Freesurfer] controlling for total gray matter volume (Clara K?hn)

2016-07-04 Thread Bruce Fischl
yes, just note that they are somewhat different hypothoses that you are testing as noted by Mike in the past. If you use average surface area/thickness you are testing the hypothesis that part of the brain is not changing/different relative to the average. If you control for TIV (or the 2/3

Re: [Freesurfer] controlling for total gray matter volume (Clara K?hn)

2016-07-04 Thread Arkadiy Maksimovskiy
Hi Clara, Yes- my apologies. I misunderstood your initial analyses description. Sounds right to me as well. - Arkadiy ___ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer The

Re: [Freesurfer] controlling for total gray matter volume

2016-07-04 Thread Bruce Fischl
arvard.edu> Gesendet: Montag, 4. Juli 2016 15:37:57 Betreff: Re: [Freesurfer] controlling for total gray matter volume sounds right to me Bruce On Mon, 4 Jul 2016, Clara Kühn wrote: I have decided now to not control for ICV or total gray matter volume when looking at cortical thickness

Re: [Freesurfer] controlling for total gray matter volume

2016-07-04 Thread Harms, Michael
ols for tGM only for area and not CT. Cheers Clara - Ursprüngliche Mail - Von: "Bruce Fischl" <fis...@nmr.mgh.harvard.edu> An: "Freesurfer support list" <freesurfer@nmr.mgh.harvard.edu> Gesendet: Montag, 4. Juli 2016 15:37:57 Betreff: Re: [Freesurfer] contro

Re: [Freesurfer] controlling for total gray matter volume

2016-07-04 Thread Clara Kühn
quot; <fis...@nmr.mgh.harvard.edu> An: "Freesurfer support list" <freesurfer@nmr.mgh.harvard.edu> Gesendet: Montag, 4. Juli 2016 15:37:57 Betreff: Re: [Freesurfer] controlling for total gray matter volume sounds right to me Bruce On Mon, 4 Jul 2016, Clara Kühn wrote: > I have

Re: [Freesurfer] controlling for total gray matter volume

2016-07-04 Thread Clara Kühn
Ok, thanks! - Ursprüngliche Mail - Von: "Bruce Fischl" <fis...@nmr.mgh.harvard.edu> An: "Freesurfer support list" <freesurfer@nmr.mgh.harvard.edu> Gesendet: Montag, 4. Juli 2016 15:37:57 Betreff: Re: [Freesurfer] controlling for total gray matter volume so

Re: [Freesurfer] controlling for total gray matter volume

2016-07-04 Thread Bruce Fischl
- Ursprüngliche Mail - Von: "Arkadiy Maksimovskiy" <arkad...@bu.edu> An: freesurfer@nmr.mgh.harvard.edu Gesendet: Samstag, 2. Juli 2016 18:36:51 Betreff: Re: [Freesurfer] controlling for total gray matter volume Hi Clara, If I am understanding your question correctly, you don't

Re: [Freesurfer] controlling for total gray matter volume

2016-07-04 Thread Clara Kühn
ot; <arkad...@bu.edu> An: freesurfer@nmr.mgh.harvard.edu Gesendet: Samstag, 2. Juli 2016 18:36:51 Betreff: Re: [Freesurfer] controlling for total gray matter volume Hi Clara, If I am understanding your question correctly, you don't need to control for brain volume when looking at thickness analy

Re: [Freesurfer] controlling for total gray matter volume

2016-07-02 Thread Arkadiy Maksimovskiy
volume (Clara K?hn) >2. cotrolling for total gray matter volume (Clara K?hn) > > > -- > > Message: 1 > Date: Thu, 30 Jun 2016 15:19:43 +0200 (CEST) > From: Clara K?hn <cku...@cbs.mpg.de> > Subject: [Freesurfer] con

[Freesurfer] controlling for total gray matter volume

2016-07-02 Thread Clara Kühn
Dear FreeSurfer experts, I would like to look at longitudinal thickness data and want to control for total gray matter volume. Should I use that information from the CROSS before anything has been registered and smoothed or from the LONG after they have been registered to the BASE? Also I was