wrong streamline direction

[Lynn]

Dear Mrtrix Experts,

I used mrtrix to do whole brain tractography and below are some of the results:

1. response function after msmt-csd
   
   
2. fiber orientation direction
   
   
3. streamline using 2nd integration (default tckgen method)
   
   
4. extract corpus callosum using tckedit
   
   
   
   This streamline direction looks wrong but i do not know what the reason could be. Looking forward to hearing from you.

Thanks for your help.
Best,
Lynn