Dear all I performed recon-all -s subjectID -qcache and obtained thickness data which was normalized to fsaverage template. I'd like to extract thickness value of the '-rh(or lh).thickness.fwhm0.fsaverage.mgh' file in each subjects, so it was transformed to the ascii file format. However, the thickness data obtained from the ascii file did have some negative values. !!! Interestingly, the thickness value that was not normalized to the fsaverage did not have negative values so I was very confused.. Please let me know how can I treat the negative value.
I really THANK YOU for your reply.
Sincerely, EK.
Hi EK,
this was a bug I fixed a little while ago. The negative thicknesses should all be in non-cortical regions, but it's fixed in the most recent version of mris_make_surfaces and mris_thickness. The negative value should all be 0
cheers, Bruce
On Thu, 1 Apr 2010, eunkyung kim wrote:
Dear all I performed recon-all -s subjectID -qcache and obtained thickness data which was normalized to fsaverage template. I'd like to extract thickness value of the '-rh(or lh).thickness.fwhm0.fsaverage.mgh' file in each subjects, so it was transformed to the ascii file format. However, the thickness data obtained from the ascii file did have some negative values. !!! Interestingly, the thickness value that was not normalized to the fsaverage did not have negative values so I was very confused.. Please let me know how can I treat the negative value.
I really THANK YOU for your reply.
Sincerely, EK. _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
freesurfer@nmr.mgh.harvard.edu
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Bruce Fischl -
eunkyung kim