[Freesurfer] Voxel dimensions and final recon

2018-12-04 Thread Michael ONeill
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Dear Freesurfer,

I'm enquiring about the known effect that pixel spacing has on the 
reconstructions and final volume estimates produces by Freesurfer. 
Specifically, is there a range of pixel spacing values that are necessary for 
accuracy? Secondly, if the pixel spacing and slice thickness are different 
values (i.e non-isometric voxels) does this have much of an effect on the final 
recon and volume estimates?

All the best,

Michael




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[Freesurfer] Petsc Error in Freesurfer v6.0

2017-03-23 Thread Michael ONeill
This problem has been resolved by installing Freesurfer v6.0 on a Ubuntu 16.04 
64-bit guest OS with "fixed disk space" instead of "Dynamically allocated".

Michael



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[Freesurfer] Petsc Error in Freesurfer v6.0

2017-03-23 Thread Michael ONeill
Hello Freesurfer Developers,

I've just installed Freesurfer v6.0 and attempted to run the commands printed 
below in order to test the installation:

freeview -v \
bert/mri/T1.mgz \
bert/mri/wm.mgz \
bert/mri/brainmask.mgz \
bert/mri/aseg.mgz:colormap=lut:opacity=0.2 \
-f \
bert/surf/lh.white:edgecolor=blue \
bert/surf/lh.pial:edgecolor=red \
bert/surf/rh.white:edgecolor=blue \
bert/surf/rh.pial:edgecolor=red

Running this resulted in the a PETSC error which i have attached in .txt file.
I'm running Ubuntu 16.04 64bit in virtual box on a windows host.
I've tried numerous solutions including using the latest dev build of 
freesurfer v6.0 (as of 23/03/2017), installing the latest version of PETSC and 
doubling the amount of RAM available to the guest OS from 12GB to 24GB.
But unfortunately none of these approaches worked and the issue still persists.

I'm very eager to start using Freesurfer v6.0 and this seems to, hopefully, be 
the last rock in the road.
Any help you could offer would be appreciated.

Kind Regards,

Michael




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OpenGL Warning: No pincher, please call crStateSetCurrentPointers() in your SPU
[0]PETSC ERROR: 

[0]PETSC ERROR: Caught signal number 11 SEGV: Segmentation Violation, probably 
memory access out of range
[0]PETSC ERROR: Try option -start_in_debugger or -on_error_attach_debugger
[0]PETSC ERROR: or see 
http://www.mcs.anl.gov/petsc/petsc-as/documentation/troubleshooting.html#Signal[0]PETSC
 ERROR: or try http://valgrind.org on linux or man libgmalloc on Apple to find 
memory corruption errors
[0]PETSC ERROR: configure using --with-debugging=yes, recompile, link, and run 
[0]PETSC ERROR: to get more information on the crash.
[0]PETSC ERROR: - Error Message 

[0]PETSC ERROR: Signal received!
[0]PETSC ERROR: 

[0]PETSC ERROR: Petsc Release Version 2.3.3, Patch 13, Thu May 15 17:29:26 CDT 
2008 HG revision: 4466c6289a0922df26e20626fd4a0b4dd03c8124
[0]PETSC ERROR: See docs/changes/index.html for recent updates.
[0]PETSC ERROR: See docs/faq.html for hints about trouble shooting.
[0]PETSC ERROR: See docs/index.html for manual pages.
[0]PETSC ERROR: 

[0]PETSC ERROR: Unknown Name on a linux-gnu named freesurfer-VirtualBox by 
freesurfer Thu Mar 23 12:41:03 2017
[0]PETSC ERROR: Libraries linked from 
/autofs/space/lyon_006/pubsw/Linux2-2.3-x86_64/packages/petsc/2.3.3-p13/src/petsc-2.3.3-p13/lib/linux-gnu-c-opt
[0]PETSC ERROR: Configure run at Tue Aug 10 15:01:59 2010
[0]PETSC ERROR: Configure options --with-debugging=no --with-cc=gcc 
--with-fc=g77 --download-f-blas-lapack=0 --download-mpich=1 --with-mpi=1 
--with-x=0 --with-gnu-copyright-code=0 --with-shared=0 COPTFLAGS=-O3 
CXXOPTFLAGS=-O3 FOPTFLAGS=-O3
[0]PETSC ERROR: 

[0]PETSC ERROR: User provided function() line 0 in unknown directory unknown 
file
[unset]: aborting job:
application called MPI_Abort(MPI_COMM_WORLD, 59) - process 0
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