esurfer";
*Subject:* Re: [Freesurfer] QDEC analyses
How you did you do your analysis? As an exploratory/map-based
analysis? Or as an ROI analysis? How did you correct for multiple
comparisons? Generally, in a map-based analysis, the correction for
multiple comparisons incorporates the fact that ther
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Thanks for your timely response.
To assess the two group differences in cortical thickness, whole-brain
vertex-wise analyses were performed using the graphical user interface of
FreeSurfer known as QDEC. We used a general linear model to compare the
External Email - Use Caution
Thanks for your timely response.
To assess the two group differences in cortical thickness, whole-brain
vertex-wise analyses were performed using the graphical user interface of
FreeSurfer known as QDEC. We used a general linear model to compare the
How you did you do your analysis? As an exploratory/map-based analysis?
Or as an ROI analysis? How did you correct for multiple comparisons?
Generally, in a map-based analysis, the correction for multiple
comparisons incorporates the fact that there are two hemispheres being
tested.
On 6/20/
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Hello Freesurfer developers,
Recently, I have used QDEC of freesurfer 6.0.0 to examine the cortical
thickness differences between two groups, and the manuscript has been submitted
to a journal. One reviewer raised a question -"The manuscript stated
External Email - Use Caution
Hello Freesurfer developers,
Recently, I have used QDEC of freesurfer 6.0.0 to examine the cortical
thickness differences between two groups, and the manuscript has been submitted
to a journal. One reviewer raised a question -"The manuscript stated
Hi Shannon, there is not a way in QDEC or with an FSGD file. You'll have
to create a design matrix and feed that into mri_glmfit with the --X
option. Let me know if you need any more assistance.
doug
On 9/10/12 5:43 PM, Shannon Kogachi wrote:
Hi Doug,
I just wanted to double check on what
Hi Doug,
I just wanted to double check on what you mean. I want to run statistical
models without the interaction term. When I ran a test using DOSS and
co-varying for sex, age, and ICV, I chose two discrete factors (study,
sex), 1 covariate (age), and 1 nuisance factor (ICV). The results I got
w
Hi Shannon, you can use the DOSS (different offset/same slope) instead
of DODS
doug
On 08/20/2012 03:47 PM, Shannon Kogachi wrote:
> Hi,
> I was wondering if there is a way to run statistical tests, such as
> a 2-way ANCOVA, on QDEC but without the interaction effect. I ran a
> 2-way ANCOVA f
Hi,
I was wondering if there is a way to run statistical tests, such as a
2-way ANCOVA, on QDEC but without the interaction effect. I ran a 2-way
ANCOVA for thickness measures for a longitudinal study, and no interaction
effect was found. Therefore, I would like to run the same test but without
t
Ok thanks so much Nick!
On 9/27/11 2:08 PM, "Nick Schmansky" wrote:
its possible to have different versions installed, just install it in
another directory.
qdec will not change any of the existing data processed with another
version.
n.
On Tue, 2011-09-27 at 14:05 -0600, Dalwani, Manish w
its possible to have different versions installed, just install it in
another directory.
qdec will not change any of the existing data processed with another
version.
n.
On Tue, 2011-09-27 at 14:05 -0600, Dalwani, Manish wrote:
> Thanks Nick, would that affect any of the files (or work) we ha
Thanks Nick, would that affect any of the files (or work) we have done on
Freesurfer version 4.5? Is there a way to use both seperately on the same
machine?
Best,
Manish
On 9/27/11 12:18 PM, "Nick Schmansky" wrote:
the easiest option is to download v5.1 and use the qdec in it. it will
inclu
the easiest option is to download v5.1 and use the qdec in it. it will
include the necessary libs that qdec is built against.
n.
On Tue, 2011-09-27 at 11:13 -0600, Dalwani, Manish wrote:
> Hello Freesurfer’s,
>
> I posted this last week. Does someone have any insights? Kindly
> advise!
>
> Man
Hello Freesurfer's,
I posted this last week. Does someone have any insights? Kindly advise!
Manish
-- Forwarded Message
From: , Manish Dalwani
Date: Fri, 23 Sep 2011 14:25:42 -0600
To:
Conversation: QDEC analyses
Subject: QDEC analyses
Hello Freesurfer's
I want to set up (thanks to Nick'
Hello Freesurfer's
I want to set up (thanks to Nick's advice) a model with 2 covariates and one
nuisance variable in QDEC. I am using the Freesurfer Version 4.5 but the QDEC
version I am running is 1.2. I did not see any option for nuisance variables in
it? I therefore went to this link
ftp:/
Miguel,
1- the 'average' referred to in the display question refers to each
vertex on the group average surface, and is the mean of all subjects in
a group. Ctrl-right click on a vertex to bring up a data plot to see
this raw data. the actual display is the p-value (-log10) of the
contrast avgA-
Hi all,
I am a little bit confused about the qdec display. I have some simple questions
about two groups A and B:
1- In the question, does the average thickness differ between A and B? How this
average is calculated? By the difference between the A average and B average
(avgA-avgB) ? The negat
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