Hi everyone

I am new in mri analysis and I need to perform whole brain tractography for graph construction. Only I have is FA map in nrdd format and eigenvalues(1,2,3). I have looked for and tried some toolboxes like camino, gretna but they require additional/raw files. Is there any way to perform tractography with this data only? Or do you have any suggestions for graph construction?

thanks

have you tried using Slicer3D (https://www.slicer.org/), This will help you convert your nrdd to nifti. The command would be something like:

DWIConvert --inputVolume testcv.nrrd --conversionMode NrrdToFSL --outputVolume testout.nii --outputBVectors testout.bvecs --outputBValues testout.bvals

You should get all the files you need for whole brain tractography using fsl/DSI_studio/Camino etc

(Hi ayse,
You must have DWI for tractography- it's the most reliable way - then DST studio can do the rest for you.
best
Mehrnaz)