[Camino-users] number of iterations for probabilistic tractography

[Birkan Tunc]

Hi,

Most people suggest using higher numbers like 5000. However, do not forget that as you increase the number of iterations you also increase the false positive rate i.e. unrealistic tracts.

Birkan 





On Monday, November 25, 2013 2:13 PM, Mojdeh Zamyadi <mojdehzm at gmail.com> wrote:
 
Hi all,

I'm using probabilistic tractography for thalamic parcellation using the 
following command and I was wondering if there is an optimal number of 
iterations? Is 1000 iterations good enough or should use a higher numebr 
(eg. 5000 as I've seen in some manuscripts)

track -inputfile DTI_ec_VoxelOrder.Bfloat -inputmodel bayesdirac_dt 
-schemefile bvec_rot.scheme -iterations 1000 -seedfile 
thalamus_only.nii.gz -brainmask B0_brain_mask.nii.gz -pointset 0 > 
bayesianTracts.Bfloat

Thanks,
-Mojdeh

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