Re: [Freesurfer] Deflate surface

2016-03-04 Thread Bruce Fischl
sure, glad to hear it worked Bruce On Fri, 4 Mar 2016, marmaduke woodman wrote: > On 03/04/2016 10:50 PM, marmaduke woodman wrote: >> On 03/04/2016 10:19 PM, Bruce Fischl wrote: >>> I think you can map it to fsaverage5 then use mri_surf2surf with >>> -sval-xyz to map the fsaverage5 surface back to

Re: [Freesurfer] Deflate surface

2016-03-04 Thread marmaduke woodman
On 03/04/2016 10:50 PM, marmaduke woodman wrote: > On 03/04/2016 10:19 PM, Bruce Fischl wrote: >> I think you can map it to fsaverage5 then use mri_surf2surf with >> -sval-xyz to map the fsaverage5 surface back to each subject Sorry for the noise, fwiw, this seems to do the trick: mri_surf2surf

Re: [Freesurfer] Deflate surface

2016-03-04 Thread marmaduke woodman
On 03/04/2016 10:19 PM, Bruce Fischl wrote: > I think you can map it to fsaverage5 then use mri_surf2surf with > -sval-xyz to map the fsaverage5 surface back to each subject This seems to generate a surface with the number of vertices in the subject, (160k) not fsaverage5 (10k), though perhaps I'

Re: [Freesurfer] Deflate surface

2016-03-04 Thread Bruce Fischl
I think you can map it to fsaverage5 then use mri_surf2surf with -sval-xyz to map the fsaverage5 surface back to each subject On Fri, 4 Mar 2016, marmaduke woodman wrote: > On 03/04/2016 10:06 PM, Bruce Fischl wrote: >> what are you trying to achieve? > > A per-subject ~10k vertex pial surface w

Re: [Freesurfer] Deflate surface

2016-03-04 Thread marmaduke woodman
On 03/04/2016 10:06 PM, Bruce Fischl wrote: > what are you trying to achieve? A per-subject ~10k vertex pial surface with a corresponding annot. We use it as a spatial domain for simulating neural activity; 150k vertices is too many for this purpose. > It might be easiest to use something like

Re: [Freesurfer] Deflate surface

2016-03-04 Thread Bruce Fischl
what are you trying to achieve? It might be easiest to use something like fsaverage5 as the downsampled surface. Then you would just map your subjects to fsaverage5 using the existing sphere.reg files cheers Bruce On Fri, 4 Mar 2016, marmaduke woodman wrote: > On 03/04/2016 09:10 PM, marmaduke

Re: [Freesurfer] Deflate surface

2016-03-04 Thread marmaduke woodman
On 03/04/2016 09:10 PM, marmaduke woodman wrote: > However, I'd like to recover the cortical parcellation for the > downsampled surface. I tried to decimate the pial & white surfaces, generate a corresponding thickness file and then mris_sample_parc -ct /opt/freesurfer/FreeSurferColorLUT.txt tv

Re: [Freesurfer] Deflate surface

2016-03-04 Thread marmaduke woodman
Hi On 03/04/2016 07:06 PM, Bruce Fischl wrote: > I think there are some tools around for downsampling the surfaces like > mris_decimate. Have you tried any of them? Yes, indeed mris_decimate works well for the downsampling. However, I'd like to recover the cortical parcellation for the downsam

Re: [Freesurfer] Deflate surface

2016-03-04 Thread Bruce Fischl
Hi Marmaduke I think there are some tools around for downsampling the surfaces like mris_decimate. Have you tried any of them? cheers Bruce On Wed, 2 Mar 2016, marmaduke woodman wrote: > Hi > > I would like to resample the cortical surface on the sphere at a lower > resolution, and then deflat