unfortunately, the convis tool is pretty old code and I haven’t touched it in a while. I do agree it’s not really useful since one needs to recompute things quite often.
I do think Ari Kappel made some edits to it at some point if you run in developer mode. Feel free to reach out to him on the slack user channel.
Re your last question, that’s not possible, lead connectome mapper is only giving you .nii output (i.e. volumetric), the name suggests so :)
I guess you can maybe use tools like trackvis or dsi studio to isolate fibers connected to nifti files. Lead connectome should also export .trk files that you can visualize there..
I’m sorry since I feel this answer doesn’t help you that much. Just for the record I do agree that there are many different areas in which one can do “connectomics” inside Lead-DBS with very different purposes, formats, etc. It must be a jungle to find out how/what to do given it’s not well documented..
So potentially could help better if you’re able to formulate *very precisely* what you want to do.
If you say, you want to compare patient specific tracts, that’s not so precise. Tracts connected to what? Or whole connectomes? Compare how? Number of tracts, their anatomical courses, specific connections between regions?
All can be done but I’d need a very very specific scientific question + a good idea of your data (i.e. ~how many subjects and is patient specific dMRI data available, what kind?) to be of good help.