Cluster threshold when visualising fixel plots

Hello dear MRtrix community,

I am wondering whether mrview has a function to display only fixels which clusters above a certain threshold.

To be more precise, in SPM-fMRI you can filter out single voxels of activity because they are too small, and have a “clean” output figure. Can mrview do the same for fixel plots?

Thank you very much,
Giuseppe

No such functionality within mrview itself, no. But if you’re looking at the results of fixel-based analysis, then you’re looking at threshold-free cluster-enhanced results, so they’ve effectively already had that kind of filtering applied.

A filter like you describe might be of use if you’re looking at different types of fixel-based outputs that are statistical in nature, yet not produced using our connectivity-based fixel enhancement (CFE) – in which case it would be interesting to hear of such use cases!