[Freesurfer] DODS and DOSS

FreeSurfers, I have been analyzing my qdec data in version 5.0 and have some interesting although somewhat confusing results. Basically I have run a very simple analysis with DODS and DOSS. My discrete factor is group and my covariate is age, about as simple as can be. When I look at the results

Re: [Freesurfer] Counting Gyri

Hi Allison I guess you could draw a curve on the surface and count the # of local maxima in the first principal curvature (which can be generates using mris_curvature -w...) cheers Bruce On Thu, 3 Mar 2011, Allie Rosen wrote: > Hello everyone, > > I am interested in counting the number of gyr

[Freesurfer] Counting Gyri

Hello everyone, I am interested in counting the number of gyri in a specific region of the brain. I am aware of the Local Gyrification Index feature, but am hoping to get precise numbers of gyri. Is there any way to do this? (By the way, I do not have Matlab) Thank you for your help, Allison Ros

Re: [Freesurfer] label to volume

Hi Meng, I think one was based on ex vivo MRI and the other was based on histology, so on different subjects would account for some variability. They are both quite reliable. cheers Bruce On Thu, 3 Mar 2011, leemon albert wrote: > Hey, > I found the results (volume of V1) with mri_label2vol

Re: [Freesurfer] label to volume

Hey, I found the results (volume of V1) with mri_label2vol in FS 4.5 is different the one in BA.stats from FS 5.o? Do they use the same method or not? Which one is more reliable? Thanks. All the best Meng Date: Wed, 02 Mar 2011 15:28:44 -0500 From: Douglas N Greve Subject: Re: [Freesurfer] lab

Re: [Freesurfer] volumetry longitudinal comparison...

Hi Gonzalo, you should run your data with the longitudinal stream (if you use fs 5.0 update mri_robust_template and recon-all first), see infos on : http://surfer.nmr.mgh.harvard.edu/fswiki/LongitudinalProcessing After processing, you can compare the volume measures in the /stats/aseg.stats file

[Freesurfer] volumetry longitudinal comparison...

Hi: I want to do a longitudinal comparison of the aseg volumetry of the same patient with two MRI in different dates... How can I do it ?... any freesurfer tool ?... qdec ?... Sincerely, Gonzalo Rojas Costa Laboratory for Advanced Medical Image Processing Department of Radiology Clínic

Re: [Freesurfer] general info about FS

Hi Roberto, 1. Yes, you can certainly do volume-based morphometry with FreeSurfer. 2. Neuroquant is a commercialization of one relatively small piece of FreeSurfer. None of the current developers of FreeSurfer have any financial interest in NeuroQuant cheers Bruce On Thu, 3 Mar 2011, Roberto