Re: [Freesurfer] Some questions about my analysis

2008-12-15 Thread Bruce Fischl
yes, that should be the most accurate. It computes the interior of the white surface, excluding voxels that are not white (ventricle, thalamus, etc) cheers Bruce On Mon, 15 Dec 2008, Christian Scheel wrote: Thanks Doug, Nick and Marie for your great support! With regards to what you wrot

Re: [Freesurfer] Some questions about my analysis

2008-12-15 Thread Christian Scheel
Thanks Doug, Nick and Marie for your great support! With regards to what you wrote to Maartje about the total gray matter volume I understand that the best way to measure it is using mris_anatomical_stats -l ?h.cortex.label subject ?h for every subject and every hemisphere. Maybe we should in

Re: [Freesurfer] Some questions about my analysis

2008-12-11 Thread Nick Schmansky
Marie, Thanks for the info. I just updated the page: https://surfer.nmr.mgh.harvard.edu/fswiki/LGI Nick On Thu, 2008-12-11 at 23:25 +0100, Marie Schaer wrote: > Nick, > > To run lGI, one need Matlab with the image processing toolbox > installed. Maybe we can add this info in the lGI wikipa

Re: [Freesurfer] Some questions about my analysis

2008-12-11 Thread Nick Schmansky
Christian, as long as all your subjects were recon-all'd using the same version (4.0.2), then you can use qdec and mri_glmfit from 4.05 or 4.10. Nick > > 4) All of recon-all has been run with Freesurfer 4.02 for all subjects - > is it OK to use Freesurfer 4.05 or 4.10 for the analysis? > Best

Re: [Freesurfer] Some questions about my analysis

2008-12-11 Thread Nick Schmansky
Marie, Are any special toolboxes required in Matlab to run the lgi code? Or will plain matlab suffice? Nick > > 6) I would like to have a look at the local gyrification index aswell > but still need to buy Matlab for it. Do I also need some extra toolboxes > to run the lgi calculation - or

Re: [Freesurfer] Some questions about my analysis

2008-12-11 Thread Doug Greve
Christian Scheel wrote: Dear all, I have got several questions about the analysis of my data. Maybe you can help me out: 1) Regarding the different levels of smoothing (FWHM) in Qdec are there already some 'standards' that one should usually stick to? My results look better when I set th

[Freesurfer] Some questions about my analysis

2008-12-11 Thread Christian Scheel
Dear all, I have got several questions about the analysis of my data. Maybe you can help me out: 1) Regarding the different levels of smoothing (FWHM) in Qdec are there already some 'standards' that one should usually stick to? My results look better when I set the smoothing level to 15 or e