Re: [Freesurfer] Doubt about label

2009-05-29 Thread Bruce Fischl
Hi Kelly, sorry, I meant to answer. mri_extract_label will make a binary ROI out of the aparc+aseg which you can use as an ROI. The indices for the different structures are in $FREESURFER_HOME/FreeSurferColorLUT.txt cheers, Bruce On Fri, 29 May 2009, Kelly Silva wrote: Hi, Freesurfers  

[Freesurfer] A question about cortical foldings

2009-05-29 Thread Zhangyuanchao
Dear Mr or Ms     Is there any way that we can obtain curvature value of the pial surface? I am not sure whether lh.curv is the curvature file that I want. How can I calculate the mean curvature, Gauss curvature of the pial surface and the GM/WM interface? Is there any built-in function in

Re: [Freesurfer] brainmask.mgz recan-all and nu_correct error

2009-05-29 Thread Iwo Bohr
Thanks Pedro, I was just thinking about it. Iwo From: Pedro Paulo de Magalhães Oliveira Junior p...@netfilter.com.br To: Iwo Bohr iwob...@yahoo.co.uk Cc: Freesurfer@nmr.mgh.harvard.edu Sent: Friday, 29 May, 2009 14:26:01 Subject: Re: [Freesurfer] brainmask.mgz

Re: [Freesurfer] A question about cortical foldings

2009-05-29 Thread Allison Stevens
You can find this information in: subjectid/stats/?h.aparc.stats Allison -- On Fri, 29 May 2009, Zhangyuanchao wrote: Dear Mr or Ms     Is there any way that we can obtain curvature value of the pial surface? I am not sure whether lh.curv is the curvature file that I want. How can I

Re: [Freesurfer] A question about cortical foldings

2009-05-29 Thread Rudolph Pienaar
The current version of Freesurfer calculates numerous curvature-based functions by default in the recon stream. If you look in the surf directory for a reconstructed surface, you'll see several curvature files that end in *.crv. By default, these are created for the gray/white junction surface

[Freesurfer] one more question about curvature

2009-05-29 Thread Zhangyuanchao
When I compare the thickness measure among subjects, I have to resample and smooth the thickness, so that each data have the same number of vertices and which are in correspondence with one another across subjects.   Now I have .curv files or .sulc files for each subject and would like to make

Re: [Freesurfer] one more question about curvature

2009-05-29 Thread Douglas N Greve
yes, you can. There's no right answer for FWHM, but people usually use 5-20mm. doug Zhangyuanchao wrote: When I compare the thickness measure among subjects, I have to resample and smooth the thickness, so that each data have the same number of vertices and which are in correspondence with

Re: [Freesurfer] one more question about curvature

2009-05-29 Thread Rudolph Pienaar
Zhangyuanchao wrote: By the way, could you recommend me relevant papers that calculates the following indices : Check the Freesurfer wiki... Our papers on curvature methodologies as well as wavelet decomposition have pdfs available. -- Rudolph Pienaar, M.Eng, D.Eng / email:

[Freesurfer] volume comparisons

2009-05-29 Thread Samantha Clark
Hi, I was wondering if there was a way to compare t1 or t2 maps between 2 subjects using the volume brain as opposed to the surface brain. To be specific I have two brains which are T1 maps. I want to see the differences in T1's between the two brains. How would i go about doing this. I hope