Dear Diego,

have a look at the FSL course material:

https://fsl.fmrib.ox.ac.uk/fslcourse/

The sections about Diffusion MRI analysis and Diffusion Tractography should cover most of what you are looking for.

Importantly, BEDPOSTX expects a folder that contains the necessary files having specific names:

http://fsl.fmrib.ox.ac.uk/fsl/fslwiki/FDT/UserGuide#BEDPOSTX

Hope this helps. Cheers,

Matteo

On 20 Oct 2016, at 19:04, Diego Szczupak <[log in to unmask]> wrote:

Dear FSL experts

I am having a hard time to estimate fiber orientation using bedpostX on a 30 directions mouse DTI. Can some one give me a guideline? 

Best Regards

Diego Szczupak