Hi,
> I am using a probabilistic mask in structural and DTI space to dermine seed based connectivity of this particular region using Probtrackx.
>
> I was told to multiply by sienax mask in DTI space
Actually, I said "it generally won't hurt to multiply by the sienax brain mask" which does not mean that you have to do this. I was unclear about what kind of analysis you were doing when I answered your previous email. Given that you are looking at white matter then it is not necessary to multiple by the sienax mask, as this will only have tiny differences at the outer edge of the grey matter cortex and so it will not affect your white matter analyses. Hence you do not need to multiple by the sienax mask in this case.
All the best,
Mark
> but I am not sure how to do that using the code mentioned in fsl: sienax <input> [options]
>
> I am using applywarp for registration of my probabilistic map on structural and DTI image.
>
> Where in between the registration stepsand how can I multiply by sienax in DTI space? What are your recommendations?
>
> Sorry if my question is very naive, I could not find an answer online :)
>
> Best,
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