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 roo

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 informati

Re: [Freesurfer] controlling for total gray matter volume

2016-07-04 Thread Bruce Fischl
ne.0148852 that controls for tGM only for area and not CT. Cheers Clara - Ursprüngliche Mail - Von: "Bruce Fischl" An: "Freesurfer support list" Gesendet: Montag, 4. Juli 2016 15:37:57 Betreff: Re: [Freesurfer] controlling for total gray matter volume sounds right to me B

Re: [Freesurfer] controlling for total gray matter volume

2016-07-04 Thread Harms, Michael
Mail - Von: "Bruce Fischl" An: "Freesurfer support list" 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

Re: [Freesurfer] controlling for total gray matter volume

2016-07-04 Thread Clara Kühn
ischl" An: "Freesurfer support list" 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 >

Re: [Freesurfer] controlling for total gray matter volume

2016-07-04 Thread Clara Kühn
Ok, thanks! - Ursprüngliche Mail - Von: "Bruce Fischl" An: "Freesurfer support list" 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

Re: [Freesurfer] controlling for total gray matter volume

2016-07-04 Thread Bruce Fischl
- Ursprüngliche Mail - Von: "Arkadiy Maksimovskiy" 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 fo

Re: [Freesurfer] controlling for total gray matter volume

2016-07-04 Thread Clara Kühn
" 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 analyses. See quote

Re: [Freesurfer] controlling for total gray matter volume

2016-07-02 Thread Arkadiy Maksimovskiy
K?hn) > > > ------ > > Message: 1 > Date: Thu, 30 Jun 2016 15:19:43 +0200 (CEST) > From: Clara K?hn > Subject: [Freesurfer] controlling for total gray matter volume > To: Freesurfer support list > Messa

[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 w