How accurate are the registrations? What is the first value in the register.dat.mincost file? On 05/16/2013 12:23 PM, Ali Ezzati wrote: > Hello FreeSurfers and TRACULA expert, > > I would be grateful if anyone could help me with my problem: > > I was able to run all the steps of TRACULA on several subjects without > any error message. My problem is that the average FA/MD/RD/AD outputs > are not in the same range as previous studies. For example, the > average FA values for all the tracts are between 0.6 and 0.8, which I > think is too high - especially since my population are elderly adults. > I wonder if anyone else had the same issue and if anyone can help me > what might be the source of the problem. > > While I was trying to narrow down the possible sources of error, I > reran a couple of subjects registering with both "FLIRT" & > "bbregister". I think in the latest version of tutorial "bbregister" > is the preferred method. The results show very large differences > between the 2 methods! Is this expected &/ normal? Although these are > different from each other, both of them still are out of range (i.e. > average FA value 20% more than literature), so registration method > -alone- is not the source of my 1st problem. > > Thank you so much, > Ali > > > _______________________________________________ > Freesurfer mailing list > Freesurfer@nmr.mgh.harvard.edu > https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
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