mean LGI per hemisphere - Freesurfer

27 Nov 2018


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Dear Freesurfer developers,
I have a quick question regarding calculating mean LGI (Marie Schaer's 
measure) per hemisphere.
I believe that I can get the mean LGI per hemisphere with a command 
like:
mri_segstats --slabel subject_ID lh 
$SUBJECTS_DIR/subject_ID/label/lh.cortex --i 
$SUBJECTS_DIR/my_subject_id/surf/lh.pial_lgi --sum 
lh.aparc.pial_lgi_lh.stats
which gives me a file like this:
# SUBJECTS_DIR /lustre/group/p00355/REST_Beijing_SCZ/Freesurfer
# subjectname Sub_010
# Label Sub_010 lh 
/lustre/group/p00355/REST_Beijing_SCZ/Freesurfer/Sub_010/label/lh.cortex
# InVolFile  
/lustre/group/p00355/REST_Beijing_SCZ/Freesurfer/Sub_010/surf/lh.pial_lgi
# InVolFileTimeStamp  2018/11/13 16:38:05
# InVolFrame 0
# ExcludeSegId
# Only reporting non-empty segmentations
# VertexArea_mm2 0.678865
# TableCol  1 ColHeader Index
# TableCol  1 FieldName Index
# TableCol  1 Units     NA
# TableCol  2 ColHeader SegId
# TableCol  2 FieldName Segmentation Id
# TableCol  2 Units     NA
# TableCol  3 ColHeader NVertices
# TableCol  3 FieldName Number of Vertices
# TableCol  3 Units     unitless
# TableCol  4 ColHeader Area_mm2
# TableCol  4 FieldName Area
# TableCol  4 Units     mm^2
# TableCol  5 ColHeader StructName
# TableCol  5 FieldName Structure Name
# TableCol  5 Units     NA
# TableCol  6 ColHeader Mean
# TableCol  6 FieldName Intensity Mean
# TableCol  6 Units     unknown
# TableCol  7 ColHeader StdDev
# TableCol  7 FieldName Itensity StdDev
# TableCol  7 Units     unknown
# TableCol  8 ColHeader Min
# TableCol  8 FieldName Intensity Min
# TableCol  8 Units     unknown
# TableCol  9 ColHeader Max
# TableCol  9 FieldName Intensity Max
# TableCol  9 Units     unknown
# TableCol 10 ColHeader Range
# TableCol 10 FieldName Intensity Range
# TableCol 10 Units     unknown
# NRows 2
# NTableCols 10
# ColHeaders  Index SegId NVertices Area_mm2 StructName Mean StdDev Min 
Max Range
   1   0      7509     5068.1  Seg0000     2.6260     0.3824     1.8121   
   3.0658     1.2537
   2   1    134787    91531.4  Seg0001     3.3455     0.8431     1.9459   
   5.7739     3.8280
I was wondering which row corresponds to the mean LGI for the left 
hemisphere (and what the other row corresponds to?
Many thanks,
Colleen