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Hi Freesurfer Developers,

I'm trying to map the vertices of a region (ex. caudal middle frontal)
in one subject
into the space of another subject (MNI) by using mri_label2label.

I am using the freesurfer_dev/bin/mri_label2label.bin from
freesurfer-x86_64-unknown-linux-gnu-dev5-20160513.

For example, I have source Labels (aparc-lh-003_5thCol.label) , which
are all in SurfaceRAS coordinates:
#!ascii label  , from subject FreeSurfer vox2ras=TkReg
8
104996  -35.679  16.281  25.156 1
104997  -36.480  16.439  25.362 2
104998  -37.443  16.702  25.369 3
105705  -41.554  16.840  28.930 4
105716  -40.445  17.153  28.046 5
105720  -39.570  17.200  26.959 6
131017  -29.315  12.915  45.422 7
131030  -31.304  12.514  46.455 8

By running this:
/usr/local/freesurfer/freesurfer_dev/bin/mri_label2label.bin
--srclabel aparc-lh-003_5thCol.label --srcsubject FreeSurfer
--trglabel aparc-lh-003_5thCol_Reg2MNI.label --trgsubject
FreeSurferMNI152 --regmethod surface --hemi lh

I got mapped Labels(aparc-lh-003_5thCol_Reg2MNI.label)
119096  -39.670  37.222  12.833 3.0000000000
117433  -44.642  35.253  14.575 4.0000000000
118250  -43.206  35.844  14.273 5.0000000000
119091  -42.114  36.692  14.044 6.0000000000
120517  -26.436  38.614  21.780 7.0000000000
121236  -25.959  39.757  24.739 8.0000000000
121253  -26.213  39.504  23.711 8.0000000000

Could I ask if there is a way to make sure that every vertex in the
source '.label' file mapped to one vertex in the target subject space?
For example, first two vertex (104996  -35.679  16.281  25.156 1) and
(104997  -36.480  16.439  25.362 2) have no corresponded vertex in the
target subject space.

Best,
Hengda


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