Dear experts,
I have two questions regarding probalistic tractography using probtrackx and tbss analyses.
1.
My first question is regarding the output of probtrackx. I tracked between a seed and a target mask in indivudal space directly and in MNI space using the same anatomical rois, the same transformations and same settings. Thinking that tracking always takes place in diffusion space. I expected the differences between the waytotal outputs do not differ or maybe just a little bit due to resolution effects.
However the waytotal counts in the tracking performed from MNI space are 10 times or even more smaller than the ones I received from directly tracking in diffusion space? I was wondering is the resolution effect so high or does anyone have an idea how the hugh difference
could emerge?
2.
I was reading that tbss analyses do not cover basal ganglia is that correct and is there a specific reason why tbss is not working in that regions?
I would be very happy if you can help me on that.
Best,
Paul
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