[Mristudio-users] fiber tracking and tensor transformation algorithms

[Yi Jiang]

Hello,

I am using DTIstudio to track fibers and using LandMarker to register the 
brains and transform (reorient) tensors in each brain by the overall matrix 
combining AIR linear affine and LDDMM.

May I have a simple description about the fiber tracking algorithm (FACT or 
other?) in DTIstudio, and the tensor transformation (reorienting )algorithm 
(preserve the principal direction? or other?) in LandMarker? And I would 
like to have the references to the above algorithms (tracking, registration, 
and tensor transformation) so I can cite in my paper.

Another two small questions about LandMarker:
1. Is the overall matrix combining AIR transformation and LDDMM in the same 
format as LDDMM raw?
2. I found two channel LDDMM finished much faster than single channel LDDMM 
(2 channels in about 2 hours, and single channel ain bout 48 hours). Is that 
normal? I am just curious.

Thank you very much for your help!

Best,
Yi