labels.txt

Labels the line segments encoded in the *.txt files in the reference_atlas/coronal/ and reference_atlas/sagittal/ directories.

For instance, a stanza in labels.txt (actually, from reference_atlas/sagittal/labels.txt) might be:

0
Alv
Ald
GU
VISC
SS
PTLp
VIS
ECT

The corresponding .txt file is 0.txt, which contains:

        X       Y       Z       Value
1       710     776     0       171
2       673     740     0       5.667
3       657     701     0       26.667
4       647     660     0       5.667
5       611     617     0       4.667
6       982     237     0       165.667
7       1026    234     0       217.333
8       1307    307     0       77.333
9       1328    348     0       218.333

This means that the line segment from (710,776) to (673,740) is labeled "Alv". The line segment from (673,740) to (657, 701) is labeled "Ald". And so on.

Some entries have a tab and then a lowercase i. This marks that line segment as "internal", that is, below the surface of the cortex.

At the end of the file is:

%END

Lines starting with % are comments (I'm not sure if this is working, however; I see that in the actual files, I put all the comments after %END).