I don't understand what you did or what the problem is. Can you elaborate?

Hi there

I tested registering a subject's pial surface to fsaverage and compared the original pial (from recon-all) with this registered pial surface. It turns out that they are almost identical in nature, and I am wondering how this is possible if recon-all does not alter the input data. 

Below is the command that I ran. Is there something I am missing here?

many thanks

Trisanna

trisanna@kaplan:~$ mri_surf2surf --srcsubject icbm-102 --sval-xyz pial --trgsubject fsaverage --tval-xyz --tval lh.pial.icbm102 --hemi lh
srcsubject = icbm-102
srcval     = (null)
srctype    =
trgsubject = fsaverage
trgval     = lh.pial.icbm102
trgtype    =
srcsurfreg = sphere.reg
trgsurfreg = sphere.reg
srchemi    = lh
trghemi    = lh
frame      = 0
fwhm-in    = 0
fwhm-out   = 0
label-src  = (null)
label-trg  = (null)
OKToRevFaceOrder  = 1
Reading source surface reg /data-01/trisanna/freesurfer/icbm-102/surf/lh.sphere.reg
Loading source data
Reading surface file /data-01/trisanna/freesurfer/icbm-102/surf/lh.pial
Reading target surface reg /data-01/trisanna/freesurfer/fsaverage/surf/lh.sphere.reg
Done
Mapping Source Volume onto Source Subject Surface
surf2surf_nnfr: building source hash (res=16).
Surf2Surf: Forward Loop (163842)

surf2surf_nnfr: building target hash (res=16).
Surf2Surf: Reverse Loop (169941)
Reverse Loop had 44416 hits
Surf2Surf: Dividing by number of hits (163842)
INFO: nSrcLost = 0
nTrg121 = 131435, nTrgMulti = 32407, MnTrgMultiHits = 2.37057
nSrc121 = 140014, nSrcLost =     0, nSrcMulti = 29927, MnSrcMultiHits = 2.28035
Saving target data

--

Ph.D. Candidate

McGill University

Integrated Program in Neuroscience

Psychology

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