Hi,
You seem to have many questions about this which I think you'll find are answered in the following papers, the FSL Course material and the FSL wiki. I recommend that you look at this material as it can explain more than we can write in a few emails.
Papers:
Smith, Stephen M., Heidi Johansen-Berg, Mark Jenkinson, Daniel Rueckert, Thomas E. Nichols, Karla L. Miller, Matthew D. Robson et al. "Acquisition and voxelwise analysis of multi-subject diffusion data with tract-based spatial statistics." Nature protocols 2, no. 3 (2007): 499-503.
S.M. Smith, M. Jenkinson, H. Johansen-Berg, D. Rueckert, T.E. Nichols, C.E. Mackay, K.E. Watkins, O. Ciccarelli, M.Z. Cader, P.M. Matthews, and T.E.J. Behrens. Tract-based spatial statistics: Voxelwise analysis of multi-subject diffusion data. NeuroImage, 31:1487-1505, 2006.
All the best,
Mark
On 28 Jun 2014, at 04:30, SUBSCRIBE FSL Xinfa_Shi <[log in to unmask]> wrote:
> Hi ,
>
> I am running through the TBSS processing stream ,and find many mask files in output result , e.g _FA_FA_mask,mean_FA_mask , mean_FA_skeleton_mask . As far as I know , mask image is used to extract specified region of object image ,and its values is generally 0 ,1 .
>
> Then what does "mask " really mean ? what's its function ? If possible ,please explain it in detail or provide some websites and papers?
>
> Best regards .
>
> Shi Xin-Fa .
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