[Freesurfer] Troubles witg GLM Surface-based Cluster Summary Table

Hi all,

I've run GLM surface analysis and I've got a summary table like this:

# Cluster Growing Summary (mri_surfcluster)

# $Id: mri_surfcluster.c,v 1.51.2.1 2011/03/28 15:32:36 greve Exp $

# $Id: mrisurf.c,v 1.693.2.2 2011/04/27 19:21:05 nicks Exp $

# CreationTime 2016/09/12-08:47:18-GMT

# cmdline mri_surfcluster --in lh.Compr.glmdir/SZSI-SZNO/sig.mgh --csd /usr/local/freesurfer/average/mult-comp-cor/fsaverage/lh/ cortex/fwhm15/pos/th40/mc-z.csd --mask lh.Compr.glmdir/mask.mgh --cwsig lh.Compr.glmdir/SZSI-SZNO/cache.th40.pos.sig.cluster.mgh --vwsig lh.Compr.glmdir/SZSI-SZNO/cache.th40.pos.sig.voxel.mgh --sum lh.Compr.glmdir/SZSI-SZNO/cache.th40.pos.sig.cluster.summary --ocn lh.Compr.glmdir/SZSI-SZNO/cache.th40.pos.sig.ocn.mgh --oannot lh.Compr.glmdir/SZSI-SZNO/cache.th40.pos.sig.ocn.annot --annot aparc --csdpdf lh.Compr.glmdir/SZSI-SZNO/cache.th40.pos.pdf.dat --cwpvalthresh 0.05 --o lh.Compr.glmdir/SZSI-SZNO/cache.th40.pos.sig.masked.mgh --no-fixmni --bonferroni 2 --surf white

# cwd /media/TREKSTOR/SUBJ/CI_Compr_Contrasts

# sysname Linux

# hostname Piras-TC2

# machine x86_64

# FixVertexAreaFlag 1

# FixSurfClusterArea 1

#

# Input lh.Compr.glmdir/SZSI-SZNO/sig.mgh

# Frame Number 0

# srcsubj fsaverage

# hemi lh

# surface white

# annot aparc

# SUBJECTS_DIR /media/TREKSTOR/SUBJ

# SearchSpace_mm2 65416.6

# SearchSpace_vtx 149953

# Bonferroni 2

# Minimum Threshold 4

# Maximum Threshold infinity

# Threshold Sign pos

# AdjustThreshWhenOneTail 1

# CW PValue Threshold: 0.05

# Area Threshold 0 mm^2

# CSD thresh 4.000000

# CSD nreps 10000

# CSD simtype null-z

# CSD contrast NA

# CSD confint 90.000000

# Overall max 1e+10 at vertex 3

# Overall min 0 at vertex 8

# NClusters 1

# Total Cortical Surface Area 65416.6 (mm^2)

# FixMNI = 0

#

# ClusterNo Max VtxMax Size(mm^2) MNIX MNIY MNIZ CWP CWPLow CWPHi NVtxs Annot

1 10000000000.000 3 76467.08 -22.1 41.5 24.1 0.00020 0.00000 0.00040 149953 rostralmiddlefrontal

Is it possible to have a Cluster Size (76467.08 mm2) greater than the Total Cortical Surface (65416.6 mm2).

Are there some errors in this?

Thanks a lot to all of you.

Claudia