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Dear Greve,

Thank you for your quick respons.

Yes, I believe that is what I mean. Let me illustrate with some (fictive) data;
We were able to prove these data for the entire hemisphere as can be seen below.

 

 

Group 1

Group 2

Difference

Sig.

Thickness

(in mm)

Left

1.48

1.46

.004

.19

Right

1.46

1.46

.003

.03






However, we would like to provide similar data in our vertex-base analyses:

Significantly different clusters between group 1 and group 2

Cortical thickness group 1

Cortical thickness group 2

Difference in mm2

Sig.

Left Cuneus

?

?

?

0.013

Left Fusiform gyrus

?

?

?

0.021

Right Paracentral lobule

?

?

?

0.001

Right parahippocampal gyrus

?

?

?

0.002


Does this clarify my question?

Best wishes,
Aicha




Van: freesurfer-bounces@nmr.mgh.harvard.edu <freesurfer-bounces@nmr.mgh.harvard.edu> namens Greve, Douglas N.,Ph.D. <DGREVE@mgh.harvard.edu>
Verzonden: donderdag 31 oktober 2019 16:25
Aan: freesurfer@nmr.mgh.harvard.edu <freesurfer@nmr.mgh.harvard.edu>
Onderwerp: Re: [Freesurfer] Cortical thickness values on a vertex base level
 
I'm not sure what you mean. Do you want the mean thickness of a cluster
and/or its surface area?

On 10/30/19 6:02 PM, Aicha Dijkshoorn wrote:
>
>         External Email - Use Caution
>
> Dear developers,
>
> For a case-control study we are comparing the cortical thickness and
> cortical surface area on a vertex-base level, for which we found
> significant differences throughout the brain.
>
> Is it possible that, in addition to the significance values (p < .05
> after FDR correction) on a vertex-base level, we can include the exact
> thickness or surface area value (or difference) of the significant
> clusters on a vertex base-level between the groups. In order words, to
> provide some measures to highlight the size of the significant cluster
> or the differences in cortical thickness / cortical surface area to
> provide clinically useful context. For instance, a command comparable
> to 'voxel size' in TBSS.
>
> As this is my first time using Freesurfer any help that you could
> offer on this matter would be highly appreciated.
>
> Best wishes,
> Brigitte Dijkshoorn
>
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