Re: [Freesurfer] Cortical Thickness Using N30R83 Atlas

2018-06-15 Thread Douglas Greve
There are files called lh.area and lh.volume that you can use instead of lh.thickness. Make sure to use the --jac flag when applying mri_surf2surf to area or volume (but not thickness). This applies jacobian correction to preserve the total area or volume. When you run mri_segstats, include the

Re: [Freesurfer] Cortical Thickness Using N30R83 Atlas

2018-06-14 Thread Ryan Flores
External Email - Use Caution Hi again Doug, Sorry for not realizing this earlier, but I actually found a workflow that you created, which outlines the steps really well. (https://surfer.nmr.mgh.harvard.edu/fswiki/VolumeRoiCorticalThickness) However, instead of 'fsaverage' I us

Re: [Freesurfer] Cortical Thickness Using N30R83 Atlas

2018-06-14 Thread Douglas N. Greve
You can create an annotation with mris_seg2annot and then view it in freeview. Run it with --help to get docs On 06/14/2018 02:18 PM, Ryan Flores wrote: > External Email - Use Caution > > Great. That seemed to have worked. Is there a way to inspect that the ROIs > have been correctly p

Re: [Freesurfer] Cortical Thickness Using N30R83 Atlas

2018-06-14 Thread Ryan Flores
External Email - Use Caution Great. That seemed to have worked. Is there a way to inspect that the ROIs have been correctly placed? Perhaps by using freeview? Best, Ryan -- Ryan Flores Clinical Research Coordinator On 6/14/18, 11:02 AM, "freesurfer-boun...@nmr.mgh.harvard.edu

Re: [Freesurfer] Cortical Thickness Using N30R83 Atlas

2018-06-14 Thread Douglas N. Greve
The --trgsurfval is just the output (ie, lh.atlas.nii.gz sampled onto the surface of the subject). Use nii.gz or mgz for the output (not img). On 06/14/2018 01:46 PM, Ryan Flores wrote: > External Email - Use Caution > > Thank you for your response. Just to clarify, the first command sh

Re: [Freesurfer] Cortical Thickness Using N30R83 Atlas

2018-06-14 Thread Ryan Flores
External Email - Use Caution Thank you for your response. Just to clarify, the first command should be mri_vol2surf, correct? It appears to have worked; however, I'm not sure what my --trgsurfval should be? I'm trying the following commands, where mni is the subject directory fo

Re: [Freesurfer] Cortical Thickness Using N30R83 Atlas

2018-06-14 Thread Douglas N. Greve
You can always get info by running the command with --help. mri_vol2vol --mov atlas.nii.gz --regheader subject --hemi lh --projfrac-max 0 1 .1 --o lh.atlas.nii.gz This assumes that the atlas is in registration with the mni152 (you can test with tkregister --mov atlas.nii.gz --s subject --reghea

[Freesurfer] Cortical Thickness Using N30R83 Atlas

2018-06-13 Thread Ryan Flores
External Email - Use Caution Hello all, I am hoping to obtain structural information (e.g., cortical thickness, surface area, and volume) based on the n30r83 (aka Hammersmith) atlas, which is in MNI space. The atlas differentiates between the hemispheres by using odd/even numbe