Compute eigenvalues of DTI and DKI tensors

Hi. I would like to know if there is some way in MRtrix to compute the three eigenvalues for both DTI and DKI tensors of brain data.
Thank you,

Hi @ros,

You’re looking for tensor2metric! You’ll need the -value option to specify an output filename, and the -num option to specify which eigenvalues you require (by default it only outputs the principal / 1st eigenvalue; you’ll want to tell -num to give you all 3 eigenvalues). Only works for the DT though; nothing available for the DKT, as far as I’m aware.


ok thank you very much!

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No worries! :+1: