Wayne,

You can try to rerun the surface reconstruction (recon-all -autorecon2-wm 
-randomness, in order to change the number of vertices, and then recon-all 
-autorecon3) and then rerun the lgi process (recon-all -lgi), this should solve 
the problem. If not, please let me know.

Marie

On Jun 27, 2011, at 10:32 PM, Wayne Su wrote:

> 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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