[Mristudio-users] Inconsistent finding of tract FA in DTIstudio and Matlab

[susumu mori]

Hi Dorian,

Hangyi can elaborate more, but I thought his FA measurement has weighting
based on the number of the streamlines.
Hangyi will follow it up.

Susumu


On Thu, Jul 11, 2013 at 2:43 PM, Dorian P. <alb.net at gmail.com> wrote:

> Hi MRIstudio team,
>
> I am doing some tractography and getting FA for tracts, but these do not
> correspond to the average FA of the voxels of the tract. In DTIstudio I use
> the Statistics button and move FA on the right box to get "Mean of ImgVal".
> Then I save the tract binary map and the FA map (Analyze format). When I
> open these images in Matlab and obtain the average FA of the tract, the
> values are not the same with DTIstudio.
>
> At this point I need to ask how does the "Statistics" button calculate
> Mean of ImgVal?
>
> Thank you for this and the previous answers.
>
> Dorian
> TJU
>
>
>
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