Hi,

 

We have done tracula tractography on 180 subjects, and most of the isosurfaces look a lot noisier than the example on the Tracula wiki (see fminor in attached figure). Is there any way to gauge the noisiness of a reconstructed path? And can that information be used for quality control? For instance, here (https://neuro.ebioscience.amc.nl/portal/web/nsg/tracula) they do not accept a noisy fminor (not unlike ours).

 

Another source of information on outliers is the log files that are produced when running -trac-all -stat (based on the shape of the tract). It doesn't seem to flag tracts that are (almost) completely missing (see attached figure, which was not flagged in lh.cab_PP.avg33_mni_bbr.log). Do they fall under the minimum threshold and are therefore not evaluated?  Is it recommended to automatically exclude the subjects that are flagged as outliers here?

Thank you!

Knut Jørgen Bjuland, PHD

Sørlandet sykehus