Hello Freesurfer Experts,

I ran into the following error when running Freesurfer for one of our
subjects, during:

mris_fix_topology -mgz -sphere qsphere.nofix -ga FirstOrderPoly lh

I could only find a partial answer to a previous post on a similar
problem - pasted at the end. Following that, I looked at lh.orig.nofix
surface - screenshots attached. I am not sure whether its alright. No
rh surfaces were created.

Please let me know how to correct this problem and proceed further.
Quick response will be greatly appreciated,

Pradeep


======= Tail end of scripts/recon-all.log  ==========
#--------------------------------------------
#...@# Fix Topology lh Fri Feb 27 19:29:56 PST 2009

 cp ../surf/lh.orig.nofix ../surf/lh.orig


 cp ../surf/lh.inflated.nofix ../surf/lh.inflated

/ensc/CORTEX/PROJECTS/UNSW/WEIWEN_PARF/PROCESSED_DATA/scanner_differences/FirstOrderPoly/scripts

 mris_fix_topology -mgz -sphere qsphere.nofix -ga FirstOrderPoly lh

reading spherical homeomorphism from 'qsphere.nofix'
using genetic algorithm with optimized parameters

*************************************************************
Topology Correction Parameters
retessellation mode:           genetic search
number of patches/generation : 10
number of generations :        10
surface mri loglikelihood coefficient :         1.0
volume mri loglikelihood coefficient :          10.0
normal dot loglikelihood coefficient :          1.0
quadratic curvature loglikelihood coefficient : 1.0
volume resolution :                             2
eliminate vertices during search :              1
initial patch selection :                       1
select all defect vertices :                    0
ordering dependant retessellation:              0
use precomputed edge table :                    0
smooth retessellated patch :                    2
match retessellated patch :                     1
verbose mode :                                  0

*************************************************************
INFO: assuming .mgz format
$Id: mris_fix_topology.c,v 1.43 2007/01/05 16:57:16 nicks Exp $
  $Id: mrisurf.c,v 1.557.2.10 2008/03/10 13:59:45 nicks Exp $
before topology correction, eno=-264 (nv=105340, nf=211208, ne=316812, g=133)
using quasi-homeomorphic spherical map to tessellate cortical surface...

Correction of the Topology
Finding true center and radius of Spherical Surface...done
Surface centered at (0,0,0) with radius 100.0 in 8 iterations
marking ambiguous vertices...
45195 ambiguous faces found in tessellation
segmenting defects...
81 defects found, arbitrating ambiguous regions...
analyzing neighboring defects...
      -merging segment 6 into 0
      -merging segment 7 into 0
      -merging segment 0 into 18
      -merging segment 39 into 28
      -merging segment 37 into 30
      -merging segment 54 into 46
      -merging segment 53 into 59
      -merging segment 72 into 64
      -merging segment 71 into 70
72 defects to be corrected
0 vertices coincident
reading input surface
/ensc/CORTEX/PROJECTS/UNSW/WEIWEN_PARF/PROCESSED_DATA/scanner_differences/FirstOrderPoly/surf/lh.qsphere.nofix...
reading brain volume from brain...
reading wm segmentation from wm...
Computing Initial Surface Statistics
      -face       loglikelihood: -9.2008  (-4.6004)
      -vertex     loglikelihood: -6.9827  (-3.4913)
      -normal dot loglikelihood: -3.5884  (-3.5884)
      -quad curv  loglikelihood: -6.0560  (-3.0280)
      Total Loglikelihood : -25.8279

CORRECTING DEFECT 0 (vertices=73, convex hull=66)
After retessellation of defect 0, euler #=-61 (80515,236855,156279) :
difference with theory (-69) = -8

CORRECTING DEFECT 1 (vertices=212, convex hull=29)
After retessellation of defect 1, euler #=-60 (80531,236912,156321) :
difference with theory (-68) = -8

CORRECTING DEFECT 2 (vertices=14, convex hull=24)
After retessellation of defect 2, euler #=-59 (80534,236928,156335) :
difference with theory (-67) = -8

CORRECTING DEFECT 3 (vertices=10731, convex hull=2557)
normal vector of length zero at vertex 90051 with 0 faces
vertex 90051 has 0 face
No such file or directory
Linux ilpc9.cs.sfu.ca 2.6.18-92.1.22.el5 #1 SMP Tue Dec 16 11:57:43
EST 2008 x86_64 x86_64 x86_64 GNU/Linux

recon-all exited with ERRORS at Fri Feb 27 21:07:28 PST 2009
========================================



------------------ Previous post with a similar problem -------------------
[Freesurfer] Problem with latest dev version (crashes correcting errors)
Tim Jarvis jarv0075 at umn.edu
Mon Feb 6 12:41:21 EST 2006

    * Previous message: [Freesurfer] Problem with latest dev version
(crashes correcting errors)
    * Next message: [Freesurfer] Problem with latest dev version
(crashes correctingerrors)
    * Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

For the lh, there is no cerebellum and no skull, looks to be correct.

I don't see any rh* files though?

brewster 14%> ls
/data/brewster2/tjarvis/thesis_data/software/freesurfer/subjects/icbm/surf/
lh.defect_borders  lh.defect_chull  lh.defect_labels  lh.inflated
lh.inflated.nofix  lh.orig  lh.orig.nofix  lh.qsphere.nofix
lh.smoothwm.nofix

On 6 Feb 2006, Bruce Fischl wrote:
> yes, mri_ca_register takes a long time. The good news is it works really
> well :>. As for the mris_topology_fixing problem, what does the
> ?h.orig.nofix surface look like? Does it include cerebellum or skull?
Does
> it look approximately correct?
>
> On Mon, 6 Feb 2006, Tim Jarvis wrote:
>
> > Gave the new dev version a spin with autorecon-all, couple of things...
> >
> > For the mri_ca_register step, it took a total of 791 minutes!  Is this
> > normal or could this be a hint as to things going wrong early in the
> > pipeline?
> >
> > Also, the program eventually crashed during the error correction, below
are
> > the lines that seem like they may have had some effect:
> >
> > Anyone else experience this problem?
> >
> >
> >
> > Thanks
> >

-- 
Pradeep Kumar Reddy. Raamana
PhD Student - Biomedical Engg.
Medical Image Analysis Lab,
Simon Fraser University,
Burnaby BC - V5A1S6 - Canada.
Work   : +1 778 782 5509

Freedom from the desire for an answer is essential to the
understanding of a problem - Jiddu Krishnamurti
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