Hi Mohamad - As it's a probabilistic method that's sampling from a distribution, there is a bit of randomness built in (which should decrease as you increase the number of samples that you collect). You'll find that the the weighted average measures are the most reliable, as they are less affected by the tails of the distribution.
a.y On Wed, 5 Nov 2014, Alshikho, Mohamad J. wrote:
Hi Anastasia, I started recently using Tracula to do tractography for my DTI data. I did the analysis exactly as mentioned in wiki. The problem is that when I am repeating the third step (trac-all -path -c ) for the same subjects to generate the statistics; Tracula is updating all the information mentioned in the file "pathstats.overal.txt" regarding the tract's volume and the tract's metrics values. Every time the output is different. I think we have a problem in the scripts or something like this? Attached are three "pathstats.overal.txt" files for the same subject after three consecutive runs for the "trac-all -path -c" (the same subject) Looking forward for your support Thanks
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