[Mristudio-users] FA value for regions in the corpus-callusom

[Kotikalapudi Raviteja]

Dear Rotem,

Though I couldn't get you completely, I understand that you need to extract
FA values and compare the same between subjects and controls. For this
purpose, you could download the JHU parcellation atlas and then use MRICro
to extract your ROIs using 'apply intensity to volume' option. This
particular ROI would then be saved and you could open it for the FA maps
and note down the values.

I hope this helps, if it is related.

Regards,
Ravi



On Thu, Aug 29, 2013 at 4:29 PM, Rotem Saar <saar.rotem at gmail.com> wrote:

> Dear experts,
>
> I have performed Automatic image registration to 19 subjects (who I have
> DTI scans for) and now about to begin fiber tracking.
>
> According to my previous anatomical results, I found volume reductions in
> specific areas of the corpus callosum, which were correlated to behavioral
> memory results. I now want to analyze the DTI data, and test for the
> correlations between the anatomical volume (per region, 5 in number),
> memory performance and FA values (per region, 5 in number).
>
> In the current working program in DTIstudio I only know how to extract a
> singe FA value for the corpuse if this is what I marked for the fiber
> tracking. I understand that I can mark a single area in the corpus each
> time but that will probably won't be accurate when comparing subjects...
>
> Is there any way to load a segmentation map in order for DTIstudio to
> compute the FA value for each region defined in the map automatically
> without the need to mark each time a different region ? if there is such an
> option, I will really appreciate if u can explain what parameters (file
> type ect...) it should contain.
>
> I really want to come to the tutorial, but the thing is I live in the
> other side of the sea:) so that won't be so easy for me to do...
>
> Thanks again for all your help
> Rotem
>
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