Dear Steve,
the L/R ‘unknown’ labels are used for unspecified voxels/vertices in the atlases and usually cover areas around the ventricles (.e.g. subcortical regions). See here for an example of the DKT40 atlas:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6371012/
Best,
Christian
On Wed, 6 May 2020 19:01:35 +0200, Steve Petersen <[log in to unmask]> wrote:
>Dear Christian,
>
>I extracted the ROI surface values and the first and there is a problem
>with the first and second column of the csv file for the a2009s (lUnknown,
>rUnknown), DK40 (lUnknown, rUnknown) and HCP_MMP1 (l???, r???) atlas.
>
>I guess the problem is in the version I'm using *(CAT12.6 (r1450)* .
>However, I wouldn't like to change it because I've already pre-processed
>the data with this version.
>
>
>Please, could you specify what brain region is the correct in each atlas
>for the first two columns?
>
>Thanks in advance.
>
>Best regards,
>
>Steve
>
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