Hi FSL expetrs,
I am using Probtrackx in FSL to do tractography between two ROIs:
one in the superior temporal cortex of the temporal lobe and the second ROI is in the preorbitals cortex of the frontal lobe.
I derived my ROIs from the output of T1 segmentation in Freesurfer then I binarized the masks and I thresholded them.
My question is :
Is it advisable to use conservative masks in Probtrackx. In other word if I threshold my mask ( ROIs) at 0.9. Is this high threshold (which eroded the cortex mask very well and left some voxels) is a correct way to do tractography or I supposed to reduce the threshold.
How can I use suitable threshold? and what really control this threshold ?
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