Re: [Freesurfer] Transformation of Pial surface to real RAS space

2015-09-27 Thread Martin Tisdall
Thank you Martin > On 28 Sep 2015, at 01:08, Bruce Fischl wrote: > > Hi Martin > > you will need to get the transform into either .lta .xfm or .dat format, > after which you can use mris_transform or mri_surf2surf I believe. > > LTA format is specified here: > http://surfer.nmr.mgh.harvard.ed

Re: [Freesurfer] Convert volume to surface

2015-09-27 Thread Martin Tisdall
I have already performed recon-all but would like to derive a surface model of a particular segmented brain structure. I have a wmparc volume file and would like to use a command to get a surface of a structure by its label. Slightly differently would also like to know the best way of producin

Re: [Freesurfer] Convert volume to surface

2015-09-27 Thread Bruce Fischl
Hi Martin what do you mean by "convert"? What is the volume? If it's a T1-weighted MRI then you can use recon-all, but it's not so much a conversion as a reconstruction. cheers Bruce On Sun, 27 Sep 2015, Martin Tisdall wrote: > Could you talk me through the best way to convert a volume to a su

Re: [Freesurfer] Transformation of Pial surface to real RAS space

2015-09-27 Thread Bruce Fischl
Hi Martin you will need to get the transform into either .lta .xfm or .dat format, after which you can use mris_transform or mri_surf2surf I believe. LTA format is specified here: http://surfer.nmr.mgh.harvard.edu/fswiki/FsTutorial/LtaFormat cheers Bruce On Sun, 27 Sep 2015, Martin Tisdall wr

Re: [Freesurfer] Longitudinal Two Stage Model using mri_glmfit

2015-09-27 Thread Bronwyn Overs
Hi Martin, Is there are holes in the intersected label, is there a recommended method for identifying which subjects caused the holes? I am hoping to run my two-stage model using an fsgd file and contrast vectors in the same way I have completed cross-sectional analyses previously. Will the

[Freesurfer] Convert volume to surface

2015-09-27 Thread Martin Tisdall
Could you talk me through the best way to convert a volume to a surface together with the option flags. Have tried mri_tessellate and mri_mc but not getting great results. Thanks ___ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.n

[Freesurfer] Transformation of Pial surface to real RAS space

2015-09-27 Thread Martin Tisdall
I am trying to apply a transformation to the freesurfer Pial surface files to move them to correct RAS space to be registered with original t1 volume when opened in slicer. Have seen a few threads about the fact that this is caused by different coordinate systems but not sure how to fix it. I