Hi Stephen,

I think it is doing what you think. The different # of vertices in the labels are probably a result of small sampling artifacts.

cheers Bruce On Thu, 16 Jul 2009, Stephen Tyree wrote:

Hello,

I'm attempting to convert labels from one subject's cortical surface to locations or nodes on another's cortical surface via spherical registration. My thought was to use mri_label2label, e.g.

mri_label2label --srcsubject Bob --srclabel Bob/label/lh.cortex.label --trgsubject bert --trglabel Bob/label/bobToBert.lh.cortex.label --regmethod surface --hemi lh

My understanding is that this should translate the labels for the nodes on Bob's lh surface to labels/nodes/locations (I'm not really sure which) on bert's lh surface. However, each label file seems to end up with a different number of labels.

Bob/label/lh.cortex.label: 146415 Bob/label/bobToBert.lh.cortex.label: 122917 bert/label/lh.cortex.label: 122108 bert/label/bertToBob.lh.cortex.label: 145629

Can someone explain more precisely what mri_label2label does and what output it produces?

Thanks.

-- Stephen Tyree Neuroimaging Computer Scientist Laureate Institute for Brain Research Tulsa, OK, USA