Celine - You're very welcome!
If this particular motion measure is identical for pretty much all your subjects, there is no point in including it. So you can just use the other 3 motion measures.
a.y
On Wed, 12 Feb 2014, Celine Louapre wrote:
Hi Anastasia Thanks a lot for your very nice talk today. I would have another question on top of the one below. I have looked at the formula to calculate the total motion index, and for the third motion parameter (percentage of slice with signal drop-out), all subjects except 2 had a 0 value. So in the formula, I would not be able to calculate the motion factor for this parameter because median, upper and lower quartile are all 0, is that correct (it would make (x-0/0-0))? Thanks for your help Celine
Hi Anastasia and freesurfer experts, I am trying to get DTI values along the tracts as in the pathstatbyvoxel file, but excluding inflammatory WM lesions. I have masks of the WM lesions that I could apply on the DTI maps, but then how could I compute the DTI metrics along the tract with the exclusion of the lesion? (I guess the last step of trac-all -path could be applied to DTI maps that were masked by the lesions?) I would like to keep the advantage of having the DTI weighted metrics in particular. Thanks a lot for your help! Celine
-- Celine Louapre, MD-PhD, Research Fellow at Massachusetts General Hospital Department of Radiology, MGH
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