Hello,

I am using FS 5.1 to measure lGI (local Gyrification Index). Only one particular scan failed. Here are some messages:

“... remeasuring lGI value for vertex iV = 65101. It may take a few minutes.
WARNING -- Problem for vertex iV = 65101, lGI value is aberrantly high (lGI=56.5472)...
...lGI computation will be stopped. This may be caused by topological defects, check mris_euler_number on the pial surface.”


“mris_euler_number ../surf/lh.orig \n
euler # = v-e+f = 2g-2: 143555 - 430659 + 287106 = 2 --> 0 holes
      F =2V-4:          287106 = 287110-4 (0)
      2E=3F:            861318 = 861318 (0)

total defect index = 0”

“mris_euler_number ./lh.pial-outer-smoothed
=================
euler # = v-e+f = 2g-2: 65560 - 196674 + 131116 = 2 --> 0 holes
      F =2V-4:          131116 = 131120-4 (0)
      2E=3F:            393348 = 393348 (0)

total defect index = 0”


I re-run the recon-all -s 01_097_Y0 -hemi lh -autorecon2 –autorecon3
and  recon-all -s 01_097_Y0 -localGI

It stopped at the same vertex.

Could you please let me know anything I can do to overcome this issue? Thank you very much.

Wayne

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