[Freesurfer] glmfit with correlated covariates

2014-03-12 Thread L. Schweren
Dear FreeSurfer experts, I am attempting to disentangle the effects of different features of pharmacological treatment on cortical thickness. I am running glmfit from the commandline, with multiple covariates (a.o. Z_Age, Z_TreatmentDuration and Z_StartAge) in the fsgd-file. These

[Freesurfer] creating a multi-scanner template?

2014-03-12 Thread Markus Gschwind
Dear all, I am planning to create a local cortical thickness normal template in order to test single patients against it. For that purpose I was planning to use 50-100 MPRAGE scans of healthy subjects (balanced for age range and sex). My question is, if I should worry about the scanner where

Re: [Freesurfer] creating a multi-scanner template?

2014-03-12 Thread Bruce Fischl
Hi Markus there is no way to know until you try it. There are many possible sources of variance depending on e.g. how uniformly they are calibrated, but you have to try and see. cheers Bruce On Wed, 12 Mar 2014, Markus Gschwind wrote: Dear all, I am planning to create a local cortical

Re: [Freesurfer] creating a multi-scanner template?

2014-03-12 Thread Markus Gschwind
Thank you Bruce! Good! So, at least it doesn't seem an impossible thing to achieve!! Best, Markus 2014-03-12 13:21 GMT+01:00 Bruce Fischl fis...@nmr.mgh.harvard.edu: Hi Markus there is no way to know until you try it. There are many possible sources of variance depending on e.g. how

[Freesurfer] Which Volume is the one in Qdec measures?

2014-03-12 Thread amirhossein manzouri
Hi All, Would please let me know about the origin of volume in the measures menu of Qdec, so I can interpret the results from group comparisons. Is it Gray Matter volume? Best regards, Amirhossein Manzouri ___ Freesurfer mailing list

Re: [Freesurfer] Group Analysis Age slopes

2014-03-12 Thread Douglas Greve
On 3/11/14 3:41 PM, pfot...@nmr.mgh.harvard.edu wrote: Hi Doug, Thanks for your reply. Just to be clear, I need to ask some trivial questions: 1) I need to do that subtraction in the fsgd file right? (In which case there will be negative numbers as well) Correct. 2) I ran the analysis

Re: [Freesurfer] view time course in freeview

2014-03-12 Thread Douglas Greve
But what is in rh.ttest.thickness.10.mgh? Is it a stack of all your subjects (the file you passed with --y to mri_glmfit)? If so, then add -t rh.ttest.thickness.10.mgh to your tksurfer command line. Ruopeng just added something to freeview to do it, but you'd have to get a new version doug

Re: [Freesurfer] convert sig.mgh into *.nii

2014-03-12 Thread Douglas Greve
Use mri_surf2vol to do this. Soemthing like mri_surf2vol --surfval rh.36...mgh --hemi rh --fillribbon --subject fsaverage --template $SUBJECTS_DIR/fsaverage/mri/orig --o yourvolume.nii doug On 3/11/14 10:10 PM, charujing123 wrote: Hi Bruce, Thanks Bruce. I knew that code, but I have no

Re: [Freesurfer] glmfit with correlated covariates

2014-03-12 Thread Douglas Greve
It is just a standard multiple regression analysis where all regressors are fit simultaneously. One weight does not include that of another weight. doug On 3/12/14 5:16 AM, L. Schweren wrote: Dear FreeSurfer experts, I am attempting to disentangle the effects of different features of

[Freesurfer] register between structural and dwi

2014-03-12 Thread Francesco Baldacchini
Hi everybody, I would like to ask a question about trac-preproc, because I'm new to Tracula and I'm studying how the entire trac-all process works. I want to know which is the specific structural image (I mean the name of the file) that is registered to the dwi volume during trac-preproc, and at

Re: [Freesurfer] register between structural and dwi

2014-03-12 Thread Anastasia Yendiki
Hi Francesco - If this registration is done with bbregister, which is the default option in tracula, then it uses the lh.white and rh.white surfaces from the freesrufer reconstruction of the structural. The low-b diffusion images are aligned to those surfaces by optimizing the contrast of the

[Freesurfer] Error mri_label2label

2014-03-12 Thread _andreia_
Hello list, When running the following command : mri_label2label --srcsubject fsaverage --srclabel /home/user/visao/Freesurfer/fsaverage/label/lh.BA1.thresh.label --trgsubject subjid --trglabel ./lh.BA1.thresh.label --hemi lh --regmethod surface I get the error INFO: foundĀ  1014 nlabel

Re: [Freesurfer] convert sig.mgh into *.nii

2014-03-12 Thread charujing123
Hi doug, Thanks doug. I have 2 new questions: 1,What you told me is generate a hemisphere. So there is only one hemisphere I can see in the AFNI? 2,After typing this code: mri_surf2vol --surfval rh.36sb.10.mgh --hemi rh --fillribbon --subject fsaverage --template