Re: [Freesurfer] Anatomical variation between individual surface and average template

2012-09-14 Thread Bruce Fischl
Hi Liang yes, that information is encoded in the .tif file that is the target of the registration. You can use mrisp_paint to copy a frame out of $FREESURFER_HOME/average/?h.average.curvature.filled.buckner40.tif the tif file is 3 sets of triplets in different frames. The first is the mean

Re: [Freesurfer] Anatomical variation between individual surface and average template

2012-09-14 Thread liang wang
Dear Bruce, Thanks for pointing me those information. That .tif file includes the mean and variance for the population sample that was used in Freesurfer. I would like to get similar measures for our own subjects. I think I could use the surface file (like surf/?h.sulc) in each subject folder to

Re: [Freesurfer] Anatomical variation between individual surface and average template

2012-09-14 Thread Douglas N Greve
You can just run mris_preproc --meas curv --o stack.mgh ... This will give you a stack from which you can compute the mean and stddev mri_concat stack.mgh --mean --o stack.mean.mgh mri_concat stack.mgh --std --o stack.std.mgh doug On 09/14/2012 01:55 PM, liang wang wrote: Dear Bruce, Thanks

Re: [Freesurfer] Anatomical variation between individual surface and average template

2012-09-14 Thread Bruce Fischl
yes, you can use mris_make_template to generate these results (it's what we used to create the tif files in the first place) On Fri, 14 Sep 2012, liang wang wrote: Dear Bruce, Thanks for pointing me those information. That .tif file includes the mean and variance for the population sample

Re: [Freesurfer] Anatomical variation between individual surface and average template

2012-09-14 Thread liang wang
Thanks Bruce. one more question: This is my command (5 subjects) mris_make_template lh sphere.reg subj1 subj2 subj3 subj4 subj5 ./Temp5subj.tif where I select sphere.reg as sphere surface. I assume 1) that the generated template Temp5subj.tif is in the Freesurfer buckner40 spherical space and

Re: [Freesurfer] Anatomical variation between individual surface and average template

2012-09-14 Thread Bruce Fischl
Hi Liang the sulc is the integrated signed dot product of the movement vector with the surface normal during inflation. It reflects large scale geometry better than ?h.curv, which is the spatially smoothed mean curvature. If you are using sphere.reg you can probably specify -norot so it

[Freesurfer] Anatomical variation between individual surface and average template

2012-09-13 Thread liang wang
Dear FS folkers, I am working on a functional probabilistic atlas. I find that some functional regions (particular along a big sulcus) show quite high probability value over a large sample, whereas the probability for some regions are quite lower. I think this disparity could be accounted for by