Hi Ruchika,
basically, if you threshold the path at 50%, or even 25%, you'll see that with both JHU and Juelich, you might not have much left... So again, 5 or 10% is probably the way to go, but it's arbitrary!
Cheers,
Gwenaelle
--- En date de : Mer 29.4.09, Ruchika Wadhwa <[log in to unmask]> a écrit :
> De: Ruchika Wadhwa <[log in to unmask]>
> Objet: Re: [FSL] Re : [FSL] creating ROI's using probabilistic atlas
> À: [log in to unmask]
> Date: Mercredi 29 Avril 2009, 17h03
> Thanks, that was really helpful. The ROI's are
> definitely being created based on the
> literature and not by first doing the whole-head analyses.
>
> One additional question that I had was what threshold
> should I be using for creating such a
> mask? I can see the advantage of using a lower threshold
> such as 5% so that I can account
> for inter-subject variations but also can think of using
> the 25% or the 50% threshold so that
> the tract that I am choosing is more representative. Any
> input on this would be much
> appreciated.
>
> Thanks again,
> -Ruchika.
|