[Freesurfer] Mac Pro Benchmark

2008-02-21 Thread Dabbs (Kevin)
Been running Freesurfer on Linux 2.0 GHz machines. I like the results but need to increase through-put for a 500 subject run. Got the money for a Mac Pro with 8 cores and 16 GB ram. Is it likely that I will get an eight times gain in through-put? Just need some kind of benchmark to determin

RE: [Freesurfer] Mac Pro Benchmark

2008-02-21 Thread Pedro Paulo Oliveira Jr
You won't gain 8 times in one analysis. But you can run 8 analysis in roughly the same time you would do one. From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Dabbs (Kevin) Sent: quinta-feira, 21 de fevereiro de 2008 13:43 To: freesurfer@nmr.mgh.harvard.edu Subject: [Freesurfer] M

[Freesurfer] WM mask

2008-02-21 Thread Gallo, Antonio (NIH/NINDS) [F]
Dear all, We are trying to extract a cerebral white matter mask from the Freesurfer output. We are currently using the aparc+aseg file in order to do this, however we realized that the white matter mask (taken by choosing the voxels with values equal to 2 and 41) doesn't correspond exactly to

Re: [Freesurfer] WM mask

2008-02-21 Thread Mishkin Derakhshan
HI Antonio, You can use mris_convert to get the surfaces into ascii format. ie: mris_convert lh.white lh.white.ascii If you look at the file you see the following: #!ascii version of lh.white 126302 252600 -7.101086 -100.61 -1.796945 0 -7.231718 -99.740860 -1.915022 0 . . -7.355780 53.0

[Freesurfer] nu_correct error

2008-02-21 Thread [EMAIL PROTECTED]
Hi, I am trying to run an MPRRAGE scan through the first step of autorecon-all, but get the following error message: Iteration 1 Thu Feb 21 14:57:06 PST 2008 nu_correct -clobber ./tmp.mri_nu_correct.mni.28541/nu0.mnc ./tmp.mri_nu_correct.mni.28541/nu1.mnc spawn: exec of nu_estim

Re: [Freesurfer] WM mask

2008-02-21 Thread Bruce Fischl
Hi Antonio, mris_fill will fill the interior of the surface, but this will include things like ventricles, thalamus, etc You could take this voxels out using the aseg if you want. The surface formats are documented on the wiki I think, but you might be better off just using mris_convert to