Hi Ethan

If you intent do do your analysis with TBSS (implemented in FSL) there is a good guide how to do such an analysis.

Steven Smith et al., Nature Protocols, 2(3), 499-503

Regards
Jürgen

On [DATE], "huangpy py" <[ADDRESS]> wrote:

Hi, everybody!

I want to perform an DTI analysis between two distinct groups, and I'm not sure about some issues. How many people do I need to reach a reliable conclusion? Is 32 directions enough? Do I have to repeat the scanning for the same person? I've read some papers but it seems that these parameters are much different.

Wish you kind experts could give me some advice~ 

Thanks

Ethan

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