Dear Freesurfers, I tried to map a single subject surface to fsaverageX (for the sake of demonstration lets take fsaverage6). I did the following: mri_surf2surf --hemi lh --srcsubject $s --sval-xyz white --trgsubject fsaverage6 --tval-xyz --tval ./lh.white.ico6 This produces a surface that seems systematically shifted (see figure). Also the newly generated surface does not contain valid geomery information (see mris_info print of lh.white and lh.white.ico6). Is there a way to fix this?
Another question: is there a reason why mris_decimate is not included in the freesurfer-Darwin-snowleopard-i686-stable-pub-v5.3.0 build Any help is very much appreciated. Best, Franz mris_info $s/surf/lh.white > SURFACE INFO ======================================== > type : MRIS_TRIANGULAR_SURFACE=MRIS_ICO_SURFACE > num vertices: 118611 > num faces : 237218 > num strips : 0 > surface area: 77595.6 > AvgVtxArea 0.654202 > AvgVtxDist 0.885026 > StdVtxDist 0.251941 > ctr : (-33.3535, -11.9536, 42.7693) > vertex locs : surfaceRAS > talairch.xfm: > 1.045 -0.093 -0.014 1.081; > 0.099 1.095 0.070 -4.263; > 0.010 -0.083 1.290 -41.092; > 0.000 0.000 0.000 1.000; > surfaceRAS to talaraiched surfaceRAS: > 1.045 -0.093 -0.014 1.177; > 0.099 1.095 0.070 13.377; > 0.010 -0.083 1.290 -49.756; > 0.000 0.000 0.000 1.000; > talairached surfaceRAS to surfaceRAS: > 0.949 0.081 0.006 -1.900; > -0.085 0.902 -0.050 -14.449; > -0.013 0.058 0.772 37.650; > 0.000 0.000 0.000 1.000; > volume geometry: > extent : (256, 256, 256) > voxel : ( 1.0000, 1.0000, 1.0000) > x_(ras) : (-1.0000, -0.0000, 0.0000) > y_(ras) : (-0.0000, 0.0000, -1.0000) > z_(ras) : ( 0.0000, 1.0000, -0.0000) > c_(ras) : ( 0.0989, 0.9660, 0.9027) > ... mris_info lh.white.ico6 > SURFACE INFO ======================================== > type : MRIS_TRIANGULAR_SURFACE=MRIS_ICO_SURFACE > num vertices: 40962 > num faces : 81920 > num strips : 0 > surface area: 75477.4 > AvgVtxArea 1.842620 > AvgVtxDist 1.573724 > StdVtxDist 0.523314 > ctr : (-33.3983, -12.0872, 42.7743) > vertex locs : surfaceRAS > volume geometry info is either not contained or not valid. > ...
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