I used the tck2connectome with the cortical parcellation result i_brain.mif. The label of i_brain.mif is from 0, which denotes the background, to 84. As anticipated, a connectome with the size 8484 will be obtained, however, I got the connectome with the size 8585.
I checked the URL (Structural connectome construction — MRtrix 3.0 documentation), it seems to say it does matter for the i_brain.mif with a label 0. But I want to know what happens behind and how can I fix this problem to have a connectome with the size 84*84, by either post-processing the connectome.csv or modifying the code below.
“tck2connectome -symmetric -zero_diagonal -tck_weights_in sift_tck.txt tracks.tck i_brain.mif connectome.csv -out_assignment connectome_assignments.csv -keep_unassigned -force -nthreads 40”