MRTrix3 on DTI data

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1

Dear all,

I have 50 subject DTI data set ( 30 directions ) , I would like to compute tractography analysis like to probabilistic tractography analysis , Could some please let me know if command line arguments of MRTrix can be applied of DTI dataset instead of DWI ?.

thanks
Vasudev

2

there are two possibilities here

  1. you have DTI data, meaning you have a volume of tensors (prob 6 or maybe 9 channels in each voxel, because you have a 3x3 symmetric tensor in each voxel
  2. you actually have DWI data, eg. 30 directions/channels in each voxel, plus maybe/hopefully gradient tables to know in which direction each channel points

in case 1, I don’t think mrtrix can help you, because it does its own tensor estimation during tractography. In case 2 however, you can run tckgen with a tensor-fitting algorithm, as described in https://mrtrix.readthedocs.io/en/latest/reference/commands/tckgen.html