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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